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Illuminating Window-Less Houses With a Plastic Bottle

New submitter DancesWithWolves writes "The BBC reports on Alfredo Moser, who came up with a way of illuminating his house during the day without electricity — using nothing more than plastic bottles filled with water and a tiny bit of bleach. In the last two years his idea has spread throughout the world. It is expected to be in one million homes by early next year.'"

240 comments

  1. Lighting on ships... by killfixx · · Score: 4, Interesting

    I've seen this type of lighting system before on old ships (USS Constitution, etc...).

    Instead of a water they used glass blocks (or similar).

    But, it's great to see a novel way of recycling trash into something beneficial! :)

    Cheers!

    --
    "Helping to keep you two steps ahead of the Thought Police!"
    1. Re:Lighting on ships... by Anonymous Coward · · Score: 0

      Used to be common in brick walls too. Glass blocks about the size of 4 criss crossed bricks as they are in self supporting brick walls but without the offset. Used for bring sunshine inside but not translucent enough for prying eyes. Used to be fairly common in bank and law offices etc.

    2. Re:Lighting on ships... by Anonymous Coward · · Score: 1

      They're called deck prisms, as a prism will spread light around.

    3. Re:Lighting on ships... by smooth+wombat · · Score: 2

      If you're ever in SoHo in New York, look down. See all those marbles embedded in the sidewalk next to stores? Same thing.

      They were doing that long before electricity was used to light the basements of buildings.

      --
      We will bankrupt ourselves in the vain search for absolute security. -- Dwight D. Eisenhower
    4. Re:Lighting on ships... by firex726 · · Score: 1

      They look alot like those geo things that people would fill with costume gems and say they had magical powers.

    5. Re:Lighting on ships... by xaxa · · Score: 1

      If you're ever in SoHo in New York, look down. See all those marbles embedded in the sidewalk next to stores? Same thing.

      They're very common in Britain, generally in the denser (and older) bits of cities. Some searching shows they're called "pavement lights".

        http://www.newageglass.co.uk/glass-block-services/details/in-situ-pavement-lights

    6. Re:Lighting on ships... by pluther · · Score: 1

      Same with Portland (The one in Oregon). They're all over downtown sidewalks.

      --
      If the masses can keep you down, you're not the Ubermensch.
    7. Re:Lighting on ships... by icebike · · Score: 0

      I've seen this type of lighting system before on old ships (USS Constitution, etc...).

      Instead of a water they used glass blocks (or similar).

      But, it's great to see a novel way of recycling trash into something beneficial! :)

      Cheers!

      Commercially available "light pipes" have been available for decades. They are sold all over the world by many different companies.

      The commercial products actually work, can reach deeply embedded rooms, and even basements, and save real electricity.

      This is not novel, and it is certainly NOT beneficial.
      Recycling a soda bottle and ruining your roof is a fools bargain.

      Please think before you gush.

      --
      Sig Battery depleted. Reverting to safe mode.
    8. Re:Lighting on ships... by Anonymous Coward · · Score: 2, Informative

      This is not for the typical US resident, except maybe in an old backyard shed or something. In a modern construction house (or refurb) with a moderate budget there are tons of options to do the same.

      This is something for places where even a few dollars is outside of the budget. But this certainly isn't for just a few pennies.

    9. Re:Lighting on ships... by batkiwi · · Score: 3, Insightful

      http://www.globalenvision.org/2011/08/18/used-soda-bottles-light-world-free

      So people in third world countries should just save up for 15 years to buy a commercial lighting system?

      This isn't about commercial use in wealthy areas, it's about giving light to the various areas in the world with "shack cities", where a few thousand people just shove up tin roofs and live in close proximity.

      It is both novel and beneficial to those people.

      Please think before you spew.

    10. Re:Lighting on ships... by RajivSLK · · Score: 1

      They have them in Victoria, BC as well. However, overtime the ones here have turned purple. The glass formula used for prisms contained magnesium.

      However, I wouldn't say that this is the same thing as a pop bottle skylight at all. Glass blocks cost money and must be installed by a professional. The pop bottle is waste garbage that is free and can be installed easily.

    11. Re:Lighting on ships... by RajivSLK · · Score: 3, Insightful

      You must be the biggest idiot in the world. The pop bottle skylights aren't for you in your single family home in pasadena. They are for people who earn less than $2/day. The free/cheap. The light pipes cost hundreds of dollars.

    12. Re: Lighting on ships... by ceoyoyo · · Score: 2

      I'm not sure I understand the purpose. Having been in huts of several different designs, and a few urban shanties, daytime light doesn't seem to really be a problem. You spend most of the daylight outdoors abyway, and when you're not you use windows or open the door.

      I'm not sure anybody I visited would be too enthusiastic about cutting holes in their nice thatched roof, and certainly not in that status-symbol tin one. Waterproofing the pop bottle skylight would be a bit of a problem.

    13. Re:Lighting on ships... by cusco · · Score: 1

      Turned purple? I had always assumed that they started that color, since I've never seen them any other color.

      --
      "Think about how stupid the average person is. Now, realise that half of them are dumber than that." - George Carlin
    14. Re: Lighting on ships... by Anonymous Coward · · Score: 1

      Waterproofing the pop bottle skylight would be a bit of a problem.

      The guy in TFA says he seals the bottles with resin and gets no leaks.

    15. Re:Lighting on ships... by icebike · · Score: 1

      And what does a new roof cost someone who makes $2 per day?

      --
      Sig Battery depleted. Reverting to safe mode.
    16. Re: Lighting on ships... by nukenerd · · Score: 1

      The guy in TFA says he seals the bottles with resin and gets no leaks.

      He would say that, wouldn't he? Get back to me in 6 months and tell me if there have been no leaks by then. I am struggling right now with leaks in my roof and that's without riddling it with holes for cheap plastic bottles, heavy with water, exposed to temperature extremes, and just glued in place.

    17. Re:Lighting on ships... by Ralph+Wiggam · · Score: 1

      Using lanterns on a gun deck containing kegs of gunpowder would have been problematic.

    18. Re:Lighting on ships... by Anonymous Coward · · Score: 0

      And what does a new roof cost someone who makes $2 per day?

      There is something seriously wrong with you - sociopathic, I guess. These bottles are commonly used in slumhouses made from scavenged metal and other junk.

      THEY ARE NOT FOR YOU.

      And that's fine. The world does not revolve around you.

    19. Re: Lighting on ships... by ChrisMaple · · Score: 2

      Tubes of poly resin are certainly common items in third-world slums. Cost about the same as - the whole rest of the roof.

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    20. Re: Lighting on ships... by iamhassi · · Score: 1

      No no everyone must be wrong this Moser guy invented the obvious in 2002 this has never ever existed before. Bottles have only been around for hundreds of years (wine bottles) there is no way this existed before 2002 /sarcasm

      --
      my karma will be here long after I'm gone
    21. Re:Lighting on ships... by nukenerd · · Score: 1

      And what does a new roof cost someone who makes $2 per day?

      There is something seriously wrong with you - sociopathic, I guess. These bottles are commonly used in slumhouses

      Calm down. I interpret Icebike's comment as referring to the fact that if installing these bottles f#@k up the roof, such as it leaks like a sieve afterwards, which is quite likely IMHO, it is going to cost the owner the work of many, many days work to buy a new roof afterwards. It is irrelevant what the bottles cost.

    22. Re: Lighting on ships... by Anonymous Coward · · Score: 0

      I'm not sure I understand the purpose...you use windows or open the door.

      You really never went to a slum, where most of the houses have NO WINDOWS...

      (and no Linux and no Mac OS)

  2. Need to diffuse the light a bit... by Greg01851 · · Score: 2

    Great idea and implementation... at least where you have the type of roof where it can be used. One modification I would add would be to add something to the water in order to make it just a bit cloudy... this would diffuse the light a bit more. Of course, depending on the plastic, it may cloud up as it ages in any case, or start with cloudy plastic (i.e. plastic milk bottles).

    1. Re:Need to diffuse the light a bit... by Anonymous Coward · · Score: 0

      One modification I would add would be to add something to the water in order to make it just a bit cloudy

      You mean like the bleach mentioned in the summary?
      [...] using nothing more than plastic bottles filled with water and a tiny bit of bleach.

    2. Re:Need to diffuse the light a bit... by Iskender · · Score: 1

      OTOH any unevenness could be a benefit. The light will be somewhat diffuse in any case. If anyone needs intense light, any hotspots can be used for that.

    3. Re:Need to diffuse the light a bit... by sdoca · · Score: 1

      The bleach is to keep the water/bottle clear of algae, not to make it cloudy.

    4. Re:Need to diffuse the light a bit... by fustakrakich · · Score: 1

      Most hotspots only provides intense light when they catch on fire, and only for a brief time.

      --
      “He’s not deformed, he’s just drunk!”
    5. Re:Need to diffuse the light a bit... by wooferhound · · Score: 2

      depending on the plastic, it may cloud up as it ages in any case, or start with cloudy plastic (i.e. plastic milk bottles).

      I wonder how long one of these bottles will last out in the Sun and Weather? Aren't these plastic bottles made to biodegrade?

      --
      We are Dead Stars looking back Up at the Sky
    6. Re:Need to diffuse the light a bit... by Jmc23 · · Score: 1, Insightful
      Oh god, your naivety would be so funny if our reality wasn't so sad.

      Like barbaric idiots we still have no laws mandating that anything produced be recyclable or biodegradable. Faced with the facts of how plastic kills wildlife and pollutes the environment, we just happily keep producing more.

      --
      Don't complain about syntax, grammar, or spelling. There is no.hell like input on android.
    7. Re:Need to diffuse the light a bit... by b4dc0d3r · · Score: 1

      I leave plastic out, it becomes brittle and breaks. Are you suggesting it is more durable than it is when exposed to ultraviolet?

      Or did you focus is a single word and use it to post a knee jerk response that, while it may be true, is unrelated?

      And, outside of laws, some companies do sell a green message, and provide products intended to degrade more quickly. Are those not within the scope of discussions?

    8. Re:Need to diffuse the light a bit... by chispito · · Score: 2

      Oh god, your naivety would be so funny if our reality wasn't so sad.

      Like barbaric idiots we still have no laws mandating that anything produced be recyclable or biodegradable. Faced with the facts of how plastic kills wildlife and pollutes the environment, we just happily keep producing more.

      Nobody said the bottles weren't recyclable (recyclable in the traditional sense; this story is about a novel way to recycle bottles).

      --
      The Daddy casts sleep on the Baby. The Baby resists!
    9. Re:Need to diffuse the light a bit... by Dishevel · · Score: 1

      That is what George said we are here for.

      --
      Why is it so hard to only have politicians for a few years, then have them go away?
    10. Re:Need to diffuse the light a bit... by Greg01851 · · Score: 1

      I didn't mention bleach? I did RTFA :)

    11. Re:Need to diffuse the light a bit... by sdoca · · Score: 1

      I wasn't replying to you, but to the AC who replied to you. He obviously didn't RTFA. :)

    12. Re:Need to diffuse the light a bit... by mattack2 · · Score: 1

      Aren't these plastic bottles made to biodegrade?

      Umm, no.. Haven't you seen that plastic bottles make up a large proportion of trash around? They definitely do not biodegrade. That fact is what makes them one of the very few things people have to pay a deposit on (at least in many parts of the U.S. and I presume much of the rest of the world)... to give incentive to return them to get your money back.

    13. Re:Need to diffuse the light a bit... by cusco · · Score: 1

      It breaks because something applies pressure. If someone is walking around on your roof and steps on them there might be a problem, otherwise they're probably fine. I might be wrong, but I think that plastic bottles only get brittle when they're empty. I have encountered a few very old plastic bottles that were still sound, and all of them were still full.

      --
      "Think about how stupid the average person is. Now, realise that half of them are dumber than that." - George Carlin
    14. Re:Need to diffuse the light a bit... by tibit · · Score: 1

      Last time Volvo tried to make their wire harnesses biodegradable, it cost them a lot of goodwill. Just sayin'. Either something is made to last or it's biodegradable. There's no in-between as far as I can see.

      --
      A successful API design takes a mixture of software design and pedagogy.
    15. Re:Need to diffuse the light a bit... by tibit · · Score: 1

      Not recycle. Reuse. It's even better than recycling: the energy cost is much less to reuse than to recycle.

      --
      A successful API design takes a mixture of software design and pedagogy.
    16. Re:Need to diffuse the light a bit... by Anonymous Coward · · Score: 1

      We'll it's not recycling. It's reusing. In any case, when the bottles become unusable after a time, I believe they can be very easily replaced.

      That famous symbol of three arrows bent to form a triangle and usually colored green which nowadays people tend to interpret as only "recycle" when, in fact, the 3 arrows where meant to mean "reduce, reuse, recycle".

      The icon/logo/image, of course, is presented as an ongoing...cycle. but if we were to pick a starting point it should be "reduce". Reducing materials used in products, and their packaging generates less waste throughout the entire cycle from production to use to discard; which, among the 3 is the least costly to the environment. After that, whatever you have after reducing, the more uses you can find for a product (or its parts), the better. Finally, if we don't have any more uses for a thing, then we can recycle it (or its parts).

      It's done this way because recycling, by itself, is the more costly of the 3. It takes more energy (all the kinds of energy involved) to produce something and recycle it, than to reuse it, or simply not use as much "stuff" making it.

      Nitpicking aside, Alfredo's reuse of the bottles is a good thing, and seems to be benefiting a lot of people that can't afford the electricity or would very much need to use that money for other things.

    17. Re:Need to diffuse the light a bit... by RaceProUK · · Score: 1

      That fact is what makes them one of the very few things people have to pay a deposit on (at least in many parts of the U.S. and I presume much of the rest of the world)

      Mainland Europe (well, EU member states anyway) have a bottle deposit scheme. The UK, on the other hand, doesn't. If we only adopt one more EU regulation/practice, it should be this.

      --
      No colour or religion ever stopped the bullet from a gun
    18. Re:Need to diffuse the light a bit... by pinkushun · · Score: 2

      Your optimism is noted but misplaced. PET plastics are recyclable but not biodegradable. The newer Bioplastics are however those are not readily used in production in any country where you would need to make a sun-light.

    19. Re:Need to diffuse the light a bit... by Anonymous Coward · · Score: 0

      Sorry, I RTFA'd when this was posted 3 years ago.

  3. Simple and zero energy cost by StuartHankins · · Score: 4, Insightful

    Elegant and no energy costs. It recycles something we all have handy. Easy to install also. Hard to argue with all those benefits!

    1. Re:Simple and zero energy cost by olsmeister · · Score: 3, Informative

      Wouldn't work here. I'd have an almighty mess after the first 20 degree night.

    2. Re:Simple and zero energy cost by phantomfive · · Score: 2

      Assuming that's 20F, if you live in a house like the ones in the article (with a tin roof), then you have more serious problems than light.....

      --
      "First they came for the slanderers and i said nothing."
    3. Re:Simple and zero energy cost by Anonymous Coward · · Score: 1

      20 degrees is room temperature

    4. Re:Simple and zero energy cost by Anonymous Coward · · Score: 1

      Leave out the bleach and instead of water fill them with alcohol. Then you don't have to worry about a mess until it gets really cold.

    5. Re:Simple and zero energy cost by Anonymous Coward · · Score: 0

      Wouldn't work here. I'd have an almighty mess after the first 20 degree night.

      Why? Yes the water might freeze but as long as there was an air gap and the glue held it should continue working.

    6. Re:Simple and zero energy cost by firex726 · · Score: 1

      Add a bit of salt, alcohol, or anti freeze.

      https://en.wikipedia.org/wiki/Freezing-point_depression

    7. Re:Simple and zero energy cost by Anonymous Coward · · Score: 0

      Water expands when it freezes

    8. Re:Simple and zero energy cost by Iskender · · Score: 1

      Water expands as it freezes, wrecking most any container.

      I like this idea a lot, but it certainly works best in warm climates.

    9. Re:Simple and zero energy cost by Anonymous Coward · · Score: 0

      Keep trying: if I'm sticking this through a roof in Minnesota, it had better withstand -60F. Anti-freeze is good down to -35 - -40F.

    10. Re:Simple and zero energy cost by Anonymous Coward · · Score: 0

      The refractive index of alcohol is even about the same as water -- shouldn't change the light output/distribution.

    11. Re:Simple and zero energy cost by wierd_w · · Score: 1

      isopropanol does not freeze unless you count "Temperatures found at the south pole, or on mars" as being a sensible design concern.

      Freezing and flashpoints of isopropanol + water solutions

      Failing that, you could fill the bottle with clear acrylic or epoxy resin instead of either, and it will NEVER freeze. it's a tad expensive but the resulting bottles wont explode when heated, wont spring leaks, freeze, etc.

    12. Re:Simple and zero energy cost by Luckyo · · Score: 1

      Most PET bottles can survive the ice expansion very well. It's the glass bottles that have most problems with it.

      I know of a guy who takes water with him for long sport days by shoving the bottle into the freezer a day before. Ice slowly melts, keeping water cold throughout the hot day and bottle has no problems if it's a PET one.

    13. Re:Simple and zero energy cost by Anonymous Coward · · Score: 0

      Wouldn't work here. I'd have an almighty mess after the first 20 degree night.

      Nope, you're assuming the bottles would burst from the ice expanion. I fill one litre soda bottles with water, freeze then, and take them to work so I can have ice water. Now, if you used glass bottles, yes, you'd have a mess, but plastic soda bottles are surprisingly expandible.

      Also great for ice chests full of beer for a picnic.

    14. Re:Simple and zero energy cost by Anonymous Coward · · Score: 0

      -32 degree wind chill is cold no matter where you are. Unless you use Kelvin, in which case it is undefined.

    15. Re:Simple and zero energy cost by Deadstick · · Score: 1

      I keep a dozen bottles of water in my car, and don't bother to remove them in the fall. I get frozen ones all winter, and they never crack.
      What does happen is that I find them partially collapsed in the spring, and use that as a puzzle for my engineering students.

    16. Re:Simple and zero energy cost by Anonymous Coward · · Score: 0

      Most PET bottles can survive the ice expansion very well.

      Look at the article. Those bottles are in holes in tin roofs. When they expand the roof will cut them open. You also can't fill the bottle fully, because water expands by 10% and will damage even PET if filled to the top, as required for better light capturing in the article.

    17. Re:Simple and zero energy cost by sjames · · Score: 1

      Add salt to the water.

    18. Re:Simple and zero energy cost by The+Grim+Reefer · · Score: 1

      Keep trying: if I'm sticking this through a roof in Minnesota, it had better withstand -60F. Anti-freeze is good down to -35 - -40F.

      I've driven rental cars in Minnesota in the winter and there are plenty on the road. What do you think is put in a cars cooling system? Here's a hint; Antifreeze. The freezing point of Propylene glycol mixed 60/40 with water is -60C (-76F). And it's relatively cheap.

      Isopropyl alcohol freezes at -89C (-128F) And is even cheaper.

    19. Re:Simple and zero energy cost by khellendros1984 · · Score: 1

      True, it's room temperature in most of the world (if a couple degrees cooler than I prefer). To a lot of Slashdot's readers, it's below freezing. The temperature scale in use should have been clear, based on context.

      --
      It is pitch black. You are likely to be eaten by a grue.
    20. Re:Simple and zero energy cost by khellendros1984 · · Score: 2

      Plastic bottles are often stretchy enough to accomodate that. There could be a problem of the bottles are embedded in something like a corrugated metal roof, but if they're in something softer, it may not be a big deal.

      --
      It is pitch black. You are likely to be eaten by a grue.
    21. Re:Simple and zero energy cost by khellendros1984 · · Score: 2

      I'll stick with someone else's answer: If you're relying on plastic-bottle-lights somewhere light Minnesota, you've probably got some more pressing problems to deal with than how to decrease the insulation of your home by putting windows and sunlights all over.

      The fact that you can pick places where the invention won't work doesn't diminish how useful it can be in the places where it does.

      --
      It is pitch black. You are likely to be eaten by a grue.
    22. Re:Simple and zero energy cost by iggymanz · · Score: 1

      a few years from now hilarity ensues while the residents squatting in mold, mildew and filth bemoan the fact they were suckered to cut holes in the roof assuming they could obtain sealer and more bottle indefinitely. wait for it!

    23. Re:Simple and zero energy cost by AmiMoJo · · Score: 2

      Somehow I find myself surprised that this is the second comment in the thread, rather than the first. Do we really need "won't work for me" posts on every story? Did anyone claim it was universally applicable and utterly flawless?

      --
      const int one = 65536; (Silvermoon, Texture.cs)
      SJW, n: "Someone I don't like, and by the way I'm a fuckwit" - AC
    24. Re:Simple and zero energy cost by NatasRevol · · Score: 1

      Plus something to keep you warm if it gets below 20F.

      --
      There are two types of people in the world: Those who crave closure
    25. Re:Simple and zero energy cost by Baloroth · · Score: 1

      The sealant around the bottle holding it to the roof wouldn't reliably hold for very long with repeated freeze/melt cycles. You'd want to fill them with an alcohol/water or pure alcohol mix instead (plus, you wouldn't need the bleach with alcohol).

      --
      "None can love freedom heartily, but good men; the rest love not freedom, but license." --John Milton
    26. Re:Simple and zero energy cost by Luckyo · · Score: 1

      You again forget the target countries and communities. Temperatures rarely if ever enter freezing there. This is like trying to argue that every house, including those near polar areas and at equator should have powerful heating and AC. It's simply complete ignorance of real world scenarios.

      Even if they had a freak freeze, the ice would not expand enough to do damage, as temperature would simply not fall that much below zero. Essentially as long as the bottle holds, they're golden.

    27. Re:Simple and zero energy cost by Spiridios · · Score: 1

      Wouldn't work here. I'd have an almighty mess after the first 20 degree night.

      Have you ever actually frozen a soda bottle? They survive just fine through many freeze-thaw cycles even while being exposed to UV. My mom used a wall of water-filled soda bottles as a way of regulating the temperature near some of her plants. They sat outside for years of winters before we got rid of them all. We also used some as ice-blocks for the cooler when picnicking - just made sure there was an air-gap for the water to expand into when freezing. I once tried filling a PET shampoo bottle with water (same plastic as soda bottles) and then freezing it to expand the plastic. I'd then top it off again so the next time it would freeze-expand bigger. The bottle got to about 150% normal size before I just gave up.

    28. Re:Simple and zero energy cost by ballpoint · · Score: 1

      Ah, Minnesota in wintertime. Once I was driving from Minneapolis towards a turkey farm town where the then mainframe resided in a room with wall-to-wall (walls included) deep puke green carpet and the car windows were freezing on the inside. Truely a memorable business trip.

      --
      Flourescent (adj): smelling like ground wheat.
    29. Re:Simple and zero energy cost by Russ1642 · · Score: 1

      My best guess is that the freezing stretches the plastic a bit, especially the parts designed for structure such as the creases. Now the bottle has a higher volume and when the ice melts the plastic doesn't go back to its original shape but rather simply collapses.

    30. Re:Simple and zero energy cost by icebike · · Score: 0

      Elegant and no energy costs. It recycles something we all have handy. Easy to install also. Hard to argue with all those benefits!

      And ruins your roof in the bargain. Such a deal!. What a great recycling project.
      Save a bottle, and replace your roof.

      Why not just Do it the right way.

      --
      Sig Battery depleted. Reverting to safe mode.
    31. Re:Simple and zero energy cost by ColdWetDog · · Score: 4, Funny

      Something tells me that bottles full of alcohol on a roof would not remain bottles full of alcohol for very long.

      --
      Faster! Faster! Faster would be better!
    32. Re:Simple and zero energy cost by omnichad · · Score: 1

      Most people heat the inside of their homes.

    33. Re:Simple and zero energy cost by omnichad · · Score: 1

      And compresses the air in the air gap. As long as the air gap stays below the seal line, it's fine.

    34. Re:Simple and zero energy cost by TheCarp · · Score: 1

      However bleach has dye in it that absorbs UV light and gives off visible light....to make your whites brighter!

      --
      "I opened my eyes, and everything went dark again"
    35. Re:Simple and zero energy cost by losfromla · · Score: 2

      if you had bothered to rtfa you'd realize that this is a solution for people who are $20 a month above homelessness, not the kind in the market for commercial $3000 a pop solar tubes. Not everyone lives in opulence.

      --
      Only I can judge you.
    36. Re:Simple and zero energy cost by icebike · · Score: 1

      Dude: Even those people, especially those people can not afford to start chopping hole in their roof and putting all of their possessions at risk due to the leaks this will cause.

      --
      Sig Battery depleted. Reverting to safe mode.
    37. Re:Simple and zero energy cost by Deadstick · · Score: 3, Interesting

      My best guess is that the freezing stretches the plastic a bit, especially the parts designed for structure such as the creases. Now the bottle has a higher volume and when the ice melts the plastic doesn't go back to its original shape but rather simply collapses.

      No, what's happening is that the light plastic screw-on cap is a bit less rigid than the bottle neck. Freezing raises the air pressure at the top, and a little bit of air manages to squeeze out of the interface. When the ice thaws, the pressure differential becomes negative, and the cap is pressed firmly onto the neck, preventing air getting back in.

      I tested this by putting a hose clamp around a cap, and the effect went away.

    38. Re: Simple and zero energy cost by ceoyoyo · · Score: 1

      That's why you keep your cows and sheep indoors and/or light a fire. Seriously.

    39. Re:Simple and zero energy cost by cusco · · Score: 2

      Just because they're poor doesn't mean that they're incompetent. I can think of three ways to install this correctly off the top of my head, and I'm sure that anyone who works with the local building materials could do the same.

      --
      "Think about how stupid the average person is. Now, realise that half of them are dumber than that." - George Carlin
    40. Re: Simple and zero energy cost by VortexCortex · · Score: 1

      That's why you keep your cows and sheep indoors and/or light a fire. Seriously.

      Hmm, cow cuddling or barbecue? Either way the sheep are screwed.

    41. Re:Simple and zero energy cost by tibit · · Score: 1

      We're talking about people living in tin shacks. Let's stay real. It's a great solution and I'd think it has no downsides for its intended audience. Never mind that it's nothing new, it has been around, out there, for more than a year, and I don't think anyone is complaining yet.

      --
      A successful API design takes a mixture of software design and pedagogy.
    42. Re:Simple and zero energy cost by kcelery · · Score: 1

      The bleach is for killing off the green algae so that the bottle would not turn green after a few week.

    43. Re:Simple and zero energy cost by ChrisMaple · · Score: 0

      Just because they're poor doesn't mean that they're incompetent.

      Well, actually, it does.

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    44. Re:Simple and zero energy cost by cusco · · Score: 2

      Oh, another libertardian.

      --
      "Think about how stupid the average person is. Now, realise that half of them are dumber than that." - George Carlin
    45. Re:Simple and zero energy cost by RaceProUK · · Score: 1

      Then half-fill the bottle. Problem solved.

      --
      No colour or religion ever stopped the bullet from a gun
    46. Re:Simple and zero energy cost by mpe · · Score: 1

      Have you ever actually frozen a soda bottle? They survive just fine through many freeze-thaw cycles even while being exposed to UV. My mom used a wall of water-filled soda bottles as a way of regulating the temperature near some of her plants. They sat outside for years of winters before we got rid of them all.

      In some places such bottles are reused. Since regular bottling lines both wash and pressure test every bottle it dosn't matter if you feed them old, new or mixed old&new bottles.

      I once tried filling a PET shampoo bottle with water (same plastic as soda bottles) and then freezing it to expand the plastic. I'd then top it off again so the next time it would freeze-expand bigger. The bottle got to about 150% normal size before I just gave up.

      Different grade of plastic, quite likely more plasticiser. Not designed to contain a fluid under pressure.

    47. Re:Simple and zero energy cost by mpe · · Score: 1

      Keep trying: if I'm sticking this through a roof in Minnesota, it had better withstand -60F. Anti-freeze is good down to -35 - -40F.

      You'd probably be better off if the water did freeze. Unless the water plus whatever can't undergo convection. Ice is a fairly poor conductor of heat.

    48. Re:Simple and zero energy cost by mrchaotica · · Score: 1

      If you're in Minnesota, you shouldn't be able to use this idea anyway because the insulation in your roof should be thicker than the height of the bottle!

      --

      "[Regarding the 'cloud,'] ownership was what made America different than Russia." -- Woz

    49. Re:Simple and zero energy cost by uninformedLuddite · · Score: 1

      Is Kelvin cuddly?

      --
      The new right fascists are bilingual. They speak English and Bullshit.
    50. Re:Simple and zero energy cost by uninformedLuddite · · Score: 1

      Have you been told today?

      --
      The new right fascists are bilingual. They speak English and Bullshit.
    51. Re:Simple and zero energy cost by Anonymous Coward · · Score: 0

      Where these people live, it NEVER freezes.

  4. firefly by Anonymous Coward · · Score: 1

    I prefer filling my bottles with fireflies and shaking them.

  5. Not in my house. by Anonymous Coward · · Score: 0

    This would be ideal for making sure the rats and squirrels in my attic have plenty of light to work with.

  6. Re:Weird... by malakai · · Score: 1

    I remember reading about this a long time ago. Also, there was a short film about it on WIMP. Neat story, but definitely not new news.

  7. aliteroflight.org did it first by seanvaandering · · Score: 0
    1. Re:aliteroflight.org did it first by Anonymous Coward · · Score: 1

      its the same guy, genius

    2. Re:aliteroflight.org did it first by Anonymous Coward · · Score: 1

      You should take your own advice and read the "About Us" page.

    3. Re:aliteroflight.org did it first by Anonymous Coward · · Score: 1

      Yes, they are spreading Alfred Moser's idea. Then again, this isn't a competition of who did it first.

    4. Re:aliteroflight.org did it first by Anonymous Coward · · Score: 0

      Reading comprehension fail. That site includes a note of thanks to Moser for the technology.

    5. Re:aliteroflight.org did it first by Anonymous Coward · · Score: 0

      No they didn't. In fact, if you read the info on the link you give they actually say "What do you get with sunshine and an old plastic bottle filled with water and chlorine? Thanks to Alfred Moser and a group of MIT students, you get a 55-watt solar bulb that refracts sunlight! " Liter of Light started in 2011? Moser came up with the idea in 2002.

      So, maybe instead of trying to demonstrate your superior knowledge, how about reading before posting?

    6. Re:aliteroflight.org did it first by Anubis+IV · · Score: 4, Informative

      Moser actually came up with the idea back in 2002 in Brazil. The "last two years" mentioned in the summary is a reference to efforts to spread the idea around the world, of which the site you mentioned is one such example. That site started about two years ago, and if you check the About page, you'll see that they credit him as the originator of the idea and mention that they are working to spread the idea in the Philippines.

    7. Re:aliteroflight.org did it first by wagnerrp · · Score: 1

      Moser didn't come up with shit. He just built a modern iteration of technology that has been around for thousands of years.

    8. Re:aliteroflight.org did it first by vux984 · · Score: 2

      Moser didn't come up with shit. He just built a modern iteration of technology that has been around for thousands of years.

      He came up with a modern iteration that can be widely and immediately deployed in the poorest parts of the world using freely available ubiquitous components and readily available installation skillsets?

      I'm curious where you've set the bar before you give someone credit for coming up with something.

    9. Re:aliteroflight.org did it first by wagnerrp · · Score: 1

      He took a simple concept, and used some simple tools to accomplish it. Call it what it is, a MacGuyverism, a hack. Applaud it for creativity, but not for being an invention.

    10. Re:aliteroflight.org did it first by uninformedLuddite · · Score: 1

      Bet you wish you posted that AC

      --
      The new right fascists are bilingual. They speak English and Bullshit.
  8. Re:Dear god, how many times can you post this? by Anonymous Coward · · Score: 0, Troll

    You sound like an idle rich compassionless bitch.

  9. Glass bottles by Anonymous Coward · · Score: 1

    Those flimsy plastic water/coke bottles *will* leak eventually, and ruin whatever flooring/furniture/equipment happens to be underneath them.

    Makes more sense to use glass bottles, IMO.

    That said, we did the exact same thing when I was a kid (decades ago) to bring some light into an old and very cluttered toolshed, which had no source of power. Seemed pretty obvious to us at the time.

    Of course, we considered it a poor-mans skylight, and didn't pretend to have some magic elegant new idea. I guess if something goes viral on facebook it means you invented it.

    1. Re:Glass bottles by phantomfive · · Score: 1

      Those flimsy plastic water/coke bottles *will* leak eventually, and ruin whatever flooring/furniture/equipment happens to be underneath them.

      You mean, dirt? Did you look at the pictures of the places they are installing them?

      --
      "First they came for the slanderers and i said nothing."
    2. Re:Glass bottles by lxs · · Score: 3, Insightful

      It's a rudimentary light pipe really. Clever but not much use unless you're directly underneath a flimsy roof. That said, I'd like to see more real light tube installations in multistory buildings. Sunlight beats both LED and fluorescent in energy efficiency and light quality.

    3. Re:Glass bottles by Russ1642 · · Score: 1

      If they leak they could ruin valuable antique furniture, hardwood floors, or even short their computers!

    4. Re:Glass bottles by gstoddart · · Score: 2

      Clever but not much use unless you're directly underneath a flimsy roof.

      Yeah, but given the sheer number of people around the world who do live directly underneath a flimsy roof ... this is the kind of thing which can be an improvement to probably millions of people for the cost of some plastic bottles and bleach.

      Am I going to poke holes in the shingled and insulated roof of my townhouse to put in plastic bottles? Nope. Are there a huge amount of people in the world for which this would provide cheap lighting? Absolutely.

      That said, I'd like to see more real light tube installations in multistory buildings.

      Indeed, who of us hasn't sat in a part of an office which doesn't afford any natural light at all?

      --
      Lost at C:>. Found at C.
    5. Re:Glass bottles by CanHasDIY · · Score: 1

      Those flimsy plastic water/coke bottles *will* leak eventually, and ruin whatever flooring/furniture/equipment happens to be underneath them.

      You mean, dirt? Did you look at the pictures of the places they are installing them?

      Right, because in poor, third-world countries, everyone has the exact same stuff in their homes, and in the exact same places.

      tl:dr, it's a legitimate concern.

      --
      An enigma, wrapped in a riddle, shrouded in bacon and cheese
    6. Re:Glass bottles by cliffjumper222 · · Score: 1

      I have a Solar Tube in my house in California and it works excellently. Better looking but more expensive than this DIY version.

    7. Re:Glass bottles by Lehk228 · · Score: 1

      it's a deck prism

      --
      Snowden and Manning are heroes.
    8. Re:Glass bottles by lxs · · Score: 5, Funny

      That's what I hate about shanty towns. No food or running water but every shack has a hardwood floor and is filled with antique furniture. This morning there was a guy outside my office begging for a few coins so I told him: "I will buy you some drugs but I won't give you money. You'll only spend it on a Louis XV side table." You have to be tough with these people or they'll never learn.

    9. Re:Glass bottles by Anonymous Coward · · Score: 0

      That's what I hate about shanty towns. No food or running water but every shack has a hardwood floor and is filled with antique furniture. This morning there was a guy outside my office begging for a few coins so I told him: "I will buy you some drugs but I won't give you money. You'll only spend it on a Louis XV side table." You have to be tough with these people or they'll never learn.

      I lived in a favela (shanty town) in Brazil. While antiques were quite rare, it seemed like every family had a large TV - most of which were protected from rain with a plastic sheet (many roofs in the shacks leaked).

    10. Re:Glass bottles by cusco · · Score: 1

      We have one in our kitchen. Everyone who has stayed with us at some point asks where to turn off the kitchen light. We tell them to just wait until the sun goes down and it will turn off.

      --
      "Think about how stupid the average person is. Now, realise that half of them are dumber than that." - George Carlin
    11. Re:Glass bottles by ChrisMaple · · Score: 1

      Cute. I have skylights. They're a risk for breakage and leakage, they're expensive, they make the room intolerably hot in the summer and colder in the winter. In short, they suck.

      --
      Contribute to civilization: ari.aynrand.org/donate
    12. Re:Glass bottles by cusco · · Score: 1

      Should have sprung the extra money for Velux skylights. There are some things that it just aren't worth saving money on, windows, skylights, doors, plumbing hardware, roofing, for a start.

      --
      "Think about how stupid the average person is. Now, realise that half of them are dumber than that." - George Carlin
  10. Secure, too... by Urban+Garlic · · Score: 4, Funny

    They're completely unhackable!.

    Soon they'll be mandatory in Enterprise deployments.

    --
    2*3*3*3*3*11*251
    1. Re:Secure, too... by Anubis+IV · · Score: 1

      They're only "unhackable" inasmuch as they aren't computerized or connected to any computer networks. But you can easily hack these to cause blackouts. Paint their exterior surfaces, for instance. Or unscrew the lid and let nature take its course over the next few weeks/months. Or punch a hole through it, which not only leaves them with reduced light, but also causes water damage to the interior of the room. And, if we're going down the tech route, surely we've already solved the problem of unscrambling refracted images by now, so all of these could very well act as windows for the people with the right software.

    2. Re:Secure, too... by UnderCoverPenguin · · Score: 2

      Soon they'll be mandatory in Enterprise deployments.

        Would be nice, but, at least in my current office, they are being ignored. The space above the ceiling is illuminated by "deck prisms" in the roof, but all the ceiling panels are opaque, so our work space does not get any of that - except when a facilities tech opens a panel to get at something above the ceiling.

      --
      Don't try to out wierd me, three-eyes. I get stranger things than you, free with my breakfast cereal. --Zaphod Beeblebr
    3. Re:Secure, too... by Anonymous Coward · · Score: 0

      Your boss is Captain Bligh!

  11. An even more elegant solution by Anonymous Coward · · Score: 0, Informative

    If it's already sunny and you need light but have no electricity.. Get windows or go outside.

    This "elegant" solution which involves drilling holes big enough in your ceiling to glue in a plastic bottle isn't so elegant at night.

    NEVER leaks, he claims, having done it for the first time 2 years ago.

    1. Re:An even more elegant solution by Anonymous Coward · · Score: 0

      Pay more attention. This is intended for use in tropical climates and places with so much poverty people are living in tin shacks. You think they have money for windows? You think they want to do everything outside in the hot sun?

    2. Re:An even more elegant solution by Iskender · · Score: 2

      If it's already sunny and you need light but have no electricity.. Get windows or go outside.

      People using this have no money for glass, probably nothing for any other kind of windows, either. This will give a lot more than no light when it rains, too. People living in slums do not necessarily have the communal space you assume they have - if they can do things at home, chances are that's the place to do it.

      Even if those things were to leak after three years, always, it would still be worth it for three years of work.

      And what's with the night part? Do you think starlight will keep people from sleeping?

    3. Re:An even more elegant solution by wonkey_monkey · · Score: 2

      NEVER leaks, he claims, having done it for the first time 2 years ago.

      Only 9 years out.

      --
      systemd is Roko's Basilisk.
    4. Re:An even more elegant solution by Russ1642 · · Score: 1

      Are you some kind of marketer hired to promote windows or something? Get a life.

    5. Re:An even more elegant solution by Score+Whore · · Score: 1

      Well, they could cut the tops and bottoms off their 1 liter bottles, then slice down the side and unroll. Bam. Nice little 8x8 plastic window.

    6. Re:An even more elegant solution by cusco · · Score: 1

      Nope, because the go opaque, get brittle and fall to pieces in fairly short order. For some reason that doesn't seem to happen to bottles that are full.

      --
      "Think about how stupid the average person is. Now, realise that half of them are dumber than that." - George Carlin
    7. Re:An even more elegant solution by tibit · · Score: 1

      Of course such a window will let an 8x8 light beam into your place, and effectively brightly illuminate about the same surface area of the floor. So instead of a dim shack illuminated by the diffuse light seeping in through the cracks, you now have a blindingly bright rectangle on the floor. You'll see less than if you had the light seeping in - had you actually given it a thought, you'd know. Small windows suck, for a reason, and especially if they are in your roof.

      The bottle acts as a simple optical system to diffuse the light. It's pretty neat.

      --
      A successful API design takes a mixture of software design and pedagogy.
    8. Re:An even more elegant solution by Score+Whore · · Score: 1

      Oh how right you are. Of course I'm an idiot, because no one has ever made a window with multiple panes. Not to mention the insanity of putting windows in one's walls. That's just crazy talk.

      Sorry. Sometimes the sarcasm just gets away from me.

    9. Re:An even more elegant solution by tibit · · Score: 2

      Ah, must have never been in a slum, then. For some reason or another, the few slums I've been in are often arranged around straight or almost straight paths, paralleled together, with the shacks sharing one or more walls, or at least being built very close to each other. The population densities there probably beat a lot of western mid-rise residential neighborhoods (8-12 stories). Three of the walls are thus usually out of commission, any windows there wouldn't let much light in, unless the neighbor's shack was ablaze :/ The front wall faces an often narrow "street". There'll be "stuff" hanging in said street, say tarps to keep the scorching sunlight out, or laundry, produce and occasional meat drying, etc. Thus, not much light is reaching the front wall either. Really the roof is the only option, and some discarded metal and bottles are about as affordable as they get. The caulking is a bit more of an expense, but presumably one could scavenge something from trash leaving the construction sites. Remember that opened caulking containers have a finite shelf life, and slum kids are professional scavengers, for lack of a better term.

      The way those lights are meant to be installed is. 1. A bottle is caulked into a piece of metal that is shaped to match the grooves/waves in the roof. The metal has a circular hole cut out with a diameter a couple cm smaller than the diameter of the bottle. Radial slots are cut along the circumference of the hole. The resulting tabs are then bent up at right angle. Those tabs are then caulked to the bottle, and caulked over. 2. A roughly bottle-diameter hole is cut into the roof, and the assembly from #1 is caulked onto the roof. The assembly #1 is the replaceable assembly, and it can be "reverted" to a bottle-less version by using a variant without, you know, the bottle installed in it.

      --
      A successful API design takes a mixture of software design and pedagogy.
  12. Prior Art by tuo42 · · Score: 1

    Read about this and aliteroflight.org couple of months ago. A very similar idea has been used for years, sadly I cannot find an english version of this Wikipedia-article about the "Schusterkugel" (which translates to "shoemaker sphere") http://de.wikipedia.org/wiki/Schusterkugel regards tuo

    1. Re:Prior Art by Anonymous Coward · · Score: 0

      We've been using this in Brazil for decades as well.

    2. Re:Prior Art by TheNinjaroach · · Score: 2

      Please read this comment regarding aliteroflight.org - or at least check their "About" page first.

      --
      I went to eat some animal crackers and the box said, "Do not eat if seal is broken." I opened the box and sure enough..
  13. Why? by chris200x9 · · Score: 0

    Why not get a skylight? I mean aside from price.

    1. Re:Why? by wonkey_monkey · · Score: 1

      Why not swim to the moon? I mean, aside from the lack of water.

      --
      systemd is Roko's Basilisk.
    2. Re:Why? by Anonymous Coward · · Score: 0

      Price is reason enough. Some people don't seem to be able to wrap their heads on just how dirt poor many parts of the world are.

    3. Re:Why? by Anonymous Coward · · Score: 1

      Too bad the polyester resin he used to seal them up isn't free. A quick search on google, the cheapest small can of it was over $10usd. That's a lot of money in places where a good monthly wage is $60usd. You know, the kind of places that need to use old bottles as skylights.

    4. Re:Why? by PPH · · Score: 2

      Ah yes. The "let them eat cake" solution.

      --
      Have gnu, will travel.
    5. Re:Why? by tibit · · Score: 1

      The places that sell it near the slums where it's actually used may not even have any online presence.

      --
      A successful API design takes a mixture of software design and pedagogy.
  14. Old old story by Anonymous Coward · · Score: 0

    Alfredo Moser came up with this idea in 2002.
    http://en.wikipedia.org/wiki/Liter_of_Light
    And was covered widely in 2011 and maybe before
    http://www.theguardian.com/environment/2011/dec/23/sunlight-bulbs-plastic-bottles-light

    1. Re:Old old story by Luckyo · · Score: 2

      So, who do you think this particular article is talking about?

  15. Re:Weird... by Anonymous Coward · · Score: 0

    I read about this on SlashCOCK and let me tell you how much I made from home...

  16. Vandalism-prone by Anonymous Coward · · Score: 2, Funny

    "I just heard someone on the roof. Why is it yellow in here?"

  17. Re:Weird... by Russ1642 · · Score: 1

    This is as old as clear plastic bottles.

  18. So the solution . . . by dmatos · · Score: 4, Insightful

    to illuminating a house with no windows is . . . to add windows? Wow.

    I mean, some kudos are deserved for finding an inexpensive (almost free) way to add windows, and using windows whose shape provides some refractory scattering of the incoming light. Still though, his solution to no windows was literally TO ADD WINDOWS.

    --

    It may look like I'm doing nothing, but I'm actively waiting for my problems to go away.
    --Scott Adams
    1. Re:So the solution . . . by tocsy · · Score: 3, Informative

      The important part is really that his idea doesn't use electricity and recycles widely available waste to provide the lighting. It also provides more light than a window the same size would, so I imagine it doesn't create as large of a structural problem.

      I worked with a non-profit called Long Way Home a few years ago who I believe was doing this, along with using plastic bottles and used tires for to build a structurally sound, environmentally friendly school in Guatemala. Unfortunately I couldn't find a picture of the plastic bottle lights in use but if you're interested, check out their website - they could use the exposure.

    2. Re:So the solution . . . by Luckyo · · Score: 2, Interesting

      Brilliant observation. Now kindly find us a near-free way to add windows that do not jeopardise the structural integrity of standard slum shack, while also providing shelter from winds and rain.

    3. Re:So the solution . . . by Anonymous Coward · · Score: 0

      But those are Real Trash windows !

    4. Re:So the solution . . . by Anonymous Coward · · Score: 0

      and it doesn't cost an ARM

    5. Re:So the solution . . . by Anonymous Coward · · Score: 0

      You really think these installations wouldn't leak? Sure, not right away, but in less than a year, I bet they will.

    6. Re:So the solution . . . by Luckyo · · Score: 2

      Has it ever occurred to you to look at the buildings they are installed in, and note the quality of roofing. I'd wager 10:1 that other parts of the roof, ones with older roofing will leak much, much sooner than the new part with bottle insert will.

    7. Re:So the solution . . . by Anonymous Coward · · Score: 0

      Not a window. A skylight.

  19. Re:Weird... by Iskender · · Score: 1

    What the fuck is this doing on slashdot?

    Ohhh... right. dice bought the place... nevermind.

    Yeah, after Dice bought Slashdot there have been stories on nothing but smart hardware hacks such as this one. No Slashdot user has ever been known to like a hardware hack.

    Old news, I'll give you that. But it's still a nice hack.

  20. The lamps work best with a black cap by adibe · · Score: 1

    From the article: "The lamps work best with a black cap - a film case can also be used". - Could somebody plaese explain why?
    How does the color of the cap impact the lighting proprieties?

    1. Re:The lamps work best with a black cap by cdrudge · · Score: 1

      My initial guess would be that a colored cap would tint or otherwise reflect whatever shade the cap was into the room. Black would reflect none. A white cap also probably would work reflecting nearly the full spectrum, but perhaps there is an issue with the light having different color temperature due to the reflection.

    2. Re:The lamps work best with a black cap by adibe · · Score: 1

      Nice insight! Thanks for clearing that up!

    3. Re: The lamps work best with a black cap by Anonymous Coward · · Score: 0

      It simple terms: You a big dummy.

    4. Re:The lamps work best with a black cap by HornWumpus · · Score: 2

      The carbon black typically used to color plastic black is also a pretty good UV protectant. Could be the caps break down in the sun before the PET.

      --
      John McAfee 'It was like that time I hired that Bangkok prostitute; to do my taxes, while I fucked my accountant'
    5. Re:The lamps work best with a black cap by MeepMeep · · Score: 1

      IIRC, the problem with the original soda cap plastic is that it degrades quickly in sunlight (UV) so it would eventually fail. I guess the film canister is made of a material resistant to UV.

  21. Light pipes by Anonymous Coward · · Score: 0

    Very cheap version of these:

    http://en.wikipedia.org/wiki/Light_tube

  22. Not perfect... by CohibaVancouver · · Score: 3, Funny

    This is Slashdot, where perfect is the enemy of good.

    Because there are edge use-cases where this won't work, it's completely unsuitable for ALL applications.

    Or, to put it another way, because it won't work in some guy's shed in Anchorage, poor people in Africa, Asia and South America should continue to toil in the dark until a proper solution involving LEDs and / or light pipes is made available.

    Now, instead let's discuss how 2014 will definitely be the year of Linux on the desktop.

    1. Re:Not perfect... by Anonymous Coward · · Score: 0

      walmart installs skylights in many stores, they are white plastic and let them rest about half their lighting. i believe the light bubbles are made from recycled walmart bags.

  23. UV breakdown? by dave3138 · · Score: 2

    Plastic bottles aren't exactly UV-stable...

    1. Re:UV breakdown? by crunchygranola · · Score: 1

      Right you are. Of the two plastics widely used in these drink bottles HDPE has a UV resistance rating of "poor" and PET has a resistance of "fair". Unless the bottles are treated with some sort of UV protection layer before installation in a few years (or less for HDPE) the bottle you cemented into your roof will start splitting, dumping the bleach filled water on your furniture, and leaving holes in your roof.

      In Third World Countries, that may not be a serious problem. People in the First World will probably find this an unacceptable drawback.

      --
      Second class citizen of the New Gilded Age
    2. Re: UV breakdown? by Anonymous Coward · · Score: 0

      So wait... You mean I might have to save another couple of bottles to replace the ones in my roof sometime in the next 1 or 3 years?

  24. Re:Weird... by cusco · · Score: 2

    Actually it's probably as old as clear glass bottles, there are mining shacks that used empty whiskey bottles for windows since they didn't have window glass (likely because they drank all the profits before winter came).

    --
    "Think about how stupid the average person is. Now, realise that half of them are dumber than that." - George Carlin
  25. This is a window. by Anonymous Coward · · Score: 0

    A window allows light to shine in but holds wind out as the etymology of the word suggests. This is a window. It's just not made from glass, nor is conventional.

  26. Solatube. by wcrowe · · Score: 1

    It's a poor man's Solatube. However, in a hail-prevalent area like mine, I would go to the expense of a Solatube than plastic bottles.

    --
    Proverbs 21:19
    1. Re:Solatube. by new+death+barbie · · Score: 1

      What kind of hail do you have that would damage the small end of a plastic bottle?
      I'm trying to imagine how much force it would take to damage one.

      --

      It's supposed to be completely automatic, but actually you have to press this button.

    2. Re:Solatube. by Lumpy · · Score: 1

      solartubes are horrible heat leaks. they are the worst thing in the world to install in any home that has insulation. What I am waiting for is 3" diameter acrylic rod that will do this for me and not have the ungodly heat losses that the solatube junk does. I had all 3 taken out of my home because of the losses they have.

      --
      Do not look at laser with remaining good eye.
    3. Re:Solatube. by Bucc5062 · · Score: 1

      According to their web site, that is not completely true

      The Solatube 160 DSe provides the ultimate in energy-efficient daylighting. Delivering natural light to spaces up to 200 sq. ft., it is designed to minimize heat loss in extremely cold climates and heat gain in extremely warm climates. As a result, this product has earned an Energy Star rating.

      Everything I see about them is that they are no worse then a window/skylight and perhaps better on heat exchange. The residential model seem more for small areas and I have a @ 800sqft room I'd love to light up so it may be cost prohibative, but a pretty good product overall.

      --
      Life is a great ride, the vehicle doesn't matter
    4. Re:Solatube. by Lumpy · · Score: 1

      No worse than a skylight that is slightly better than a Hole in the ceiling. It still makes them horrible for any home that has to use HVAC and be efficient.

      --
      Do not look at laser with remaining good eye.
    5. Re:Solatube. by Man+Eating+Duck · · Score: 1

      It's a poor man's Solatube. However, in a hail-prevalent area like mine, I would go to the expense of a Solatube than plastic bottles.

      Since you're probably not a poor man living in a shanty town, you have likely gone to the expense of electric lighting. This trick is not intended for you.

      --
      Are you a grammar Nazi? I'm trying to improve my English; please correct my errors! :)
    6. Re:Solatube. by cusco · · Score: 1

      The Solatube is pretty much identical in efficiency to a standard skylight. The Solatube's interior bubble was cold to the touch the first winter, so I insulated the tube. Within a couple of hours it had warmed up to the same temperature as the ceiling that it was mounted in. And "slightly better than a Hole in the ceiling"? I don't know what kind of crap you've dealt with in the past, but our Velux skylight is rated to the same energy efficiency as our Kolbe and Kolbe windows.

      --
      "Think about how stupid the average person is. Now, realise that half of them are dumber than that." - George Carlin
    7. Re:Solatube. by Lumpy · · Score: 1

      "The Solatube is pretty much identical in efficiency to a standard skylight."

      Which is horrible. Again, normal homes have a R-30 to R-45 insulation rating for the ceiling. the absolute best skylights on the market, 4 pane super duper space age ones are R-9 Most are R-3 to R-5 for the high end ones. And open hole is R-0

      So my point stands, they are barely more efficient than a hole in the ceiling.

      --
      Do not look at laser with remaining good eye.
  27. Related video by tanveer1979 · · Score: 1

    Saw this some time back
    http://www.youtube.com/watch?v=buMyJPQLS9U

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  28. Doesn't work by Anonymous Coward · · Score: 0

    I just bored big holes to the living room of my neighbor. The bottles are all dark as is my left eye.

  29. Good idea for third world countries, BUT by Anonymous Coward · · Score: 0

    1. It's not a "light bulb". It's just a cheap version of a "solartube". Again, good for poor people, but not a freaking light bulb.

    2. Flawed analysis to make themselves feel good. They talk about the CO2 footprint of their "bulb" then compare it to a 50W incandescent running for 14 hours a day. First, where are they getting 14 hours a day of SUNLIGHT everyday, all year. Second, why not compare to a CFL or LED bulb? Third, it only works during the day, when light is already available.

    Don't get me wrong. It's clever. It's a good way for people who are very very poor to improve their life quality. But that's all it is. They spin the concept to make it sound like people in western countries should start sticking evian bottles through their roofs and poof, no more global warming.

    Instead of building stuff out of trash, why doesn't someone fire up a kick starter project to design a manufacture a low cost, long lasting purpose built equivalent.

    1. Re:Good idea for third world countries, BUT by Lumpy · · Score: 1

      "First, where are they getting 14 hours a day of SUNLIGHT everyday,"

      Nome, Alaska

      --
      Do not look at laser with remaining good eye.
    2. Re:Good idea for third world countries, BUT by ccool · · Score: 1

      You'll get a lot of sunlight in the summer, but nothing in the winter (Everyday, all year long)

    3. Re:Good idea for third world countries, BUT by Lumpy · · Score: 1

      Actually you get light in the winter, It's a funky green light and very low intensity, but it's there.

      --
      Do not look at laser with remaining good eye.
  30. Re:Weird... by Joce640k · · Score: 1

    I remember reading about this a long time ago.

    Is that why the summary says: "In the last two years..."?

    --
    No sig today...
  31. Yearly Slashdot post on this... by Lumpy · · Score: 2

    Honestly it seems that every year for the past 4 years slashdot herolds this.

    Then HAD will do it in about 2 days.

    --
    Do not look at laser with remaining good eye.
  32. This was news LAST YEAR by Anonymous Coward · · Score: 0

    Slashdot is run by out of touch idiots.
    First you start with aricles on stuff that Gizmag featured days before, now this.

    Why don't those worthless savages just build NORMAL houses?

  33. Old Idea, new twist, perhaps by Anonymous Coward · · Score: 0

    I have seen this before, but not quite made with recycled bottles.
    http://en.wikipedia.org/wiki/Deck_prism

    They're called Deck Prisms, and were used on sailing ships, embedded in the decks to spread light below, but flat and therefore flush with the deck itself.

    Nice to see a new and different use for old bottles.
    If they were mounted bottom up, and flush, would they work as well?
    What about glass bottles?
    Could there be a direct comparison to the solid glass versions of the olden days?

  34. Re:Dear god, how many times can you post this? by Anonymous Coward · · Score: 0

    Nothing new to offer except derision.

    ... said the Democrat, deriding Republicans as one-trick ponies.

  35. Windowsless - you mean Linux run? by Anonymous Coward · · Score: 0

    N/t

  36. The Milli Vanilli of plastic bottle light by Anonymous Coward · · Score: 0

    see http://tech.slashdot.org/comments.pl?sid=4085769&cid=44555053

  37. Deck prisms. by westlake · · Score: 1

    I've seen this type of lighting system before on old ships (USS Constitution, etc...).

    Deck prisms have been used for centuries.

    DeckPrisms.com sells reproductions for decorative use and restoration. Marine supply houses sell them with frames. Fixed Portholes and Deck Prisms

  38. OK, you're dirt poor; I get that... by Anonymous Coward · · Score: 0

    OK, you're dirt poor. I get that; but why in the ceiling? Even a shack can sustain some hole-drilling in the walls. Drill a nice pattern of holes in one spot on THE WALL. Put the bottles there. You don't get a fabulous picture window, but you get light and it won't leak so easily. Yes. These WILL leak. It's just a matter of time. Shacks have cups and buckets on the floor all the time even when they aren't trying to put in cheapo skylights.

    1. Re:OK, you're dirt poor; I get that... by Anonymous Coward · · Score: 0

      RTFA. You seal the gap with resin. No leaks.

  39. Wow... by mjr167 · · Score: 1

    And here I was hoping for some fun chemistry. Instead we get "no electricity? Use the sun!" What if I have no sun you insensitive clod!

    1. Re:Wow... by Quirkz · · Score: 1

      If you have no sun, use your dotter.

  40. Re:Let the EPA continue by CanHasDIY · · Score: 2

    And this will be coming to the USA also, because they will have to jack up utility rates, just to
    please the enviro-nuts in the USA.

    I hate to break this to ya, Chief, but the jacking of utility rates has far less to do with "enviro-nuts" than it does greedy utility company executives.

    --
    An enigma, wrapped in a riddle, shrouded in bacon and cheese
  41. Adding Phosphor? by CanHasDIY · · Score: 1

    http://en.wikipedia.org/wiki/Phosphor#Glow-in-the-dark_toys

    Just a thought; might help diffuse light in the daytime, as well as providing some light after dark.

    Whether or not the materials to make such a modification are readily available in third-world countries I cannot speculate on.

    --
    An enigma, wrapped in a riddle, shrouded in bacon and cheese
  42. Re:Dear god, how many times can you post this? by tbuddy · · Score: 2

    Are you saying that because we've seen this for the last two years that this is somehow not news?

  43. Very cool idea, but by TheDarkener · · Score: 1

    What happens when night falls?

    --
    It is pitch black. You are likely to be eaten by a grue.
    1. Re:Very cool idea, but by losfromla · · Score: 1

      they sleep, or do stuff in the dark. The stuff you hear your parents doing when they think you're asleep in the basement.

      --
      Only I can judge you.
    2. Re:Very cool idea, but by TheDarkener · · Score: 1

      You mean they post lame comments on Internet forums to try and prop up their self-image?

      --
      It is pitch black. You are likely to be eaten by a grue.
    3. Re:Very cool idea, but by losfromla · · Score: 2

      son? I knew we'd meet here eventually..

      --
      Only I can judge you.
    4. Re:Very cool idea, but by PPH · · Score: 1

      You ever accidentally see your parents having sex?
      Well, that's the last time I visit that web site.

      --Larry the Cable Guy

      --
      Have gnu, will travel.
  44. Moonlight by Skiron · · Score: 1

    It's a great idea, costing almost nothing to implement and light up dingy shacks and such. But I wondered if you get some sort of decent light on a nice dark full moon night? Nobody seems to have mentioned that

  45. Re:Weird... by wagnerrp · · Score: 1

    Nope. Older than that. Even Cretans (from ancient Crete) used them.

  46. Welcome to 2010! by YoungManKlaus · · Score: 1

    I remember seeing a ted-talk or something like that about this exact topic around that time.

  47. well, hail.... by Sooner+Boomer · · Score: 1

    What kind of hail do you have that would damage the small end of a plastic bottle? I'm trying to imagine how much force it would take to damage one.

    Here in Central Oklahoma (you know, the place with EF 5 tornados...), hail the size of ping pong or golf balls is common at least once a year (frequently more often), and hailstones up to 3" is not unheard of. These will go completely through a commonly-decked roof.

    --
    Chaos maximizes locally around me.
  48. Narrowing by tepples · · Score: 1

    In an article about a particular invention, I see nothing wrong with discussing what's the best area or way to apply the invention.

  49. I decided this was an abolutely brilliant idea by idontgno · · Score: 1

    and installed several in my ceiling.

    My mom got mad I was cutting holes in her kitchen floor. Apparently, she WANTS my only light source to be glowing LCD screens and blue LED power indicators.

    --
    Welcome to the Panopticon. Used to be a prison, now it's your home.
  50. Illuminating ... With a Plastic Bottle. And a dri by mnemotronic · · Score: 2

    The BBC article goes all breathless about this great low-tech approach for poor third-world countries without mentioning the fact that the user has drilled a bunch of holes in their roof. Combine that with a rainy climate like the Philippines (mentioned in the article) and you've got a problem. The solution, apparently, is polyester resin. Excellent choice, and so widely available in third-world slums. No slam intended to the unfortunate residents who are also blessed with power tools.

    --
    The Russians have won. They have made the world a cesspool of distrust, greed, fear and hate.
  51. Also known as a "light pipe" by msobkow · · Score: 1

    Using a bottle in this fashion is basically implementing a short "light pipe." The technology has been around a long time, but the water-filled-pop-bottle is the cheapest implementation I've heard of.

    --
    I do not fail; I succeed at finding out what does not work.
    1. Re:Also known as a "light pipe" by Anonymous Coward · · Score: 0

      Except it doesn't meet building code, and therefore is illegal to install in the US.

      There are plenty of approved light-pipe implementations that only cost about $5,000 per room to install, though, so it's not a big deal.

  52. Re:Dear god, how many times can you post this? by godrik · · Score: 1

    I have been reading slashdot for years. And apparently I missed that particular news in th epast. Sometimes, repetition is a good thing. Also once a year does not seem like an unreasonnable rate for such a news.

  53. Re:Illuminating ... With a Plastic Bottle. And a d by RJFerret · · Score: 2

    Tools only require power in lazy post-industrial societies. Hand tools are inexpensive, effective and less costly to operate. I've cut steel roofing with hand snips in seconds.

    Polyester resin is kind of a staple product. In post-industrial societies, it's sold for recreation in craft stores. But in less developed places, it's needed for boat building and all sorts of fabrication. Before 3D printers with their costly supplies, we made molds and used resin for pennies.

    I imagine they are chosing it over tar or pitch due to availability as much as any other factor.

  54. Re:Weird... by Ocker3 · · Score: 2

    http://www.youtube.com/watch?v=_zMAWztZ6TI This guy in Brazil thought it up in 2002 during a blackout, I'm pretty sure that's more than 2 years ago. This story keeps getting recycled as writers and editors forget that they've already covered it before.

  55. 40 to 60Watt ?? by Anonymous Coward · · Score: 0

    received from sun: 150 to 300W/m^2 (https://en.wikipedia.org/wiki/Solar_energy)
    bottle ca. 0.01m^2
    maximum power is 3W
    What is wrong here?

    1. Re:40 to 60Watt ?? by ChrisMaple · · Score: 1

      3W / 5% efficiency = 60W equivalent (incandescent). Additionally, the figures you cite are average (including cloud cover, nighttime) and include all solar energy reaching the ground, not just light. There are a host of other factors that should be considered; much more careful analysis should be done.

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  56. Re:Dear god, how many times can you post this? by ChrisMaple · · Score: 1

    Evidently the idea that the root of "news" is "new", is news to you.

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    Contribute to civilization: ari.aynrand.org/donate
  57. Re:Let the EPA continue by ChrisMaple · · Score: 1

    Electricity companies are very heavily regulated and closely watched by the government, mostly because fools like you are always whining. Try looking at their profit margins and executive compensation before making ignorant and inflammatory posts.

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  58. Re:...and on the shelfs for decades by RaceProUK · · Score: 1

    That must be so comforting to the people of Africa who live on $10 a year.

    --
    No colour or religion ever stopped the bullet from a gun
  59. Re: Let the EPA continue by Anonymous Coward · · Score: 0

    Wait... you mean energy companies don't have the world's highest profit margins? I somehow think that you're full of shit, mostly because of widely-published news.

  60. Re:Let the EPA continue by CanHasDIY · · Score: 1

    Yea, you obviously don't get your power from the same privately-owned (but "publicly" operated) utility company as I do.

    These assholes find any and every reason to raise rates, government regulations be damned. Last year, they informed the public that they intended to jack rates almost 10% because we didn't get enough rain. No bullshit.

    --
    An enigma, wrapped in a riddle, shrouded in bacon and cheese
  61. UV rays eat plastic by Anonymous Coward · · Score: 0

    This wouldn't last one summer in my city. You would need to replace the bottles constantly, eventually opening up leaks.

  62. Re:Illuminating ... With a Plastic Bottle. And a d by mpe · · Score: 1

    Polyester resin is kind of a staple product. In post-industrial societies, it's sold for recreation in craft stores. But in less developed places, it's needed for boat building and all sorts of fabrication. Before 3D printers with their costly supplies, we made molds and used resin for pennies.
    I imagine they are chosing it over tar or pitch due to availability as much as any other factor.


    Or more likely that it won't melt in hot weather. Since 2kg lumps dropping from the ceiling tend to be hazardous.

  63. Re:Dear god, how many times can you post this? by Anonymous Coward · · Score: 0

    Sorry, can you repeat that? I couldn't hear what you were saying over the partisan whining of someone stupid enough to think there is a quantifiable difference between Democrat and Republican politicians.