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Sleeping In Rooms With Even a Little Light Can Increase Risk of Depression, Study Finds (iflscience.com)

Japanese researchers have found that even the slightest slither of light when trying to sleep could be linked to a heightened risk of depression, according to a new study published in The American Journal of Epidemiology. IFLScience reports: The reason behind this link is unclear, but the researchers believe it might be to do with the human circadian rhythm, the 24-hour cycle that tells us when to sleep and wake up, among other things, that is "programmed" by environmental factors. In the case of humans and many other creatures, light influences how much of the sleep-inducing hormone melatonin is pumped into our bodies, meaning we feel awake when the Sun rises and get sleepy when the Sun sets. This system works like a charm when there's only sunlight, moonlight, and a campfire to think about. However, the modern world is beaming with almost constant exposure to artificial light. Light at night (LAN) in a bedroom -- even a flash of a digital clock or streetlight creeping in from a crack in the curtains -- could screw with our natural sleep/wake cycle. The team behind the recent study assessed the sleep of almost 900 elderly people with no signs of depression. They found that people who slept in a room with 5 lux of light or more at night showed a "significantly higher depression risk" than those who slept in a completely dark room. For perspective, a household room with its lights on is around 80 lux and 10 lux is a single candle from 0.3 meters (1 foot) away.

20 of 177 comments (clear)

  1. Full Moon is ~0.1 Lux by pavon · · Score: 5, Interesting

    For comparison in the other direction.

    1. Re:Full Moon is ~0.1 Lux by PopeRatzo · · Score: 4, Interesting

      That means dim status LEDs are probably okay

      They're not OK. Really, it's worth the effort to try to cover them up as much as possible. Cultivate the best sleep you can and darkness is really good for sleep.

      --
      You are welcome on my lawn.
    2. Re:Full Moon is ~0.1 Lux by ShanghaiBill · · Score: 4, Informative

      That means dim status LEDs are probably okay

      They're not OK. Really, it's worth the effort to try to cover them up as much as possible.

      It depends on the color. Red LEDs are best. Blue are the worst.

      Also, the best material to darken windows is aluminum foil. Put it on with furnace tape. Use small fragments of furnace tape to cover any pinholes.

      My bedroom has a red LED digital clock, angled so I have to lift my head to see it. Otherwise, it is pitch black even in the middle of the day.

      Sleeping well is a wise investment. It will help you be healthy and productive.

    3. Re:Full Moon is ~0.1 Lux by dcollins117 · · Score: 4, Funny

      Also, the best material to darken windows is aluminum foil. Put it on with furnace tape. Use small fragments of furnace tape to cover any pinholes.

      It's also the best material to completely cover your head. Just use the same instructions.

    4. Re:Full Moon is ~0.1 Lux by Nidi62 · · Score: 5, Funny

      For comparison in the other direction.

      We need a unit that Slashdot readers can understand. How much lux does a burning Library of Congress put out from one furlong?

      --
      The only thing necessary for evil to triumph is for it to be pitted against a slightly greater evil
    5. Re:Full Moon is ~0.1 Lux by AmiMoJo · · Score: 2

      A slightly easier option is IKEA "black-out" curtains and blinds. I also recommend a wake-up light for the mornings, that gently increases light levels before your alarm goes off.

      --
      const int one = 65536; (Silvermoon, Texture.cs)
      SJW, n: "Someone I don't like, and by the way I'm a fuckwit" - AC
    6. Re:Full Moon is ~0.1 Lux by ImprovOmega · · Score: 3, Interesting

      For comparison in the other direction.

      We need a unit that Slashdot readers can understand. How much lux does a burning Library of Congress put out from one furlong?

      Well, if we extrapolate from a burning candle flame taking up one square inch visible and outputting 12.5 lumens at the source, then take one of the library of congress buildings, say the Thomas Jefferson building which is roughly 500ft on a side and around 60ft tall... Then we assume that the 500*60 = 30,000 sq ft side is completely engulfed, which would be 4,320,000 square inches * 12.5 lumens/sq in. = 54,000,000 lumens at the source. Multiply by three buildings and we get a total output of 162,000,000 lumens,

      Now convert to lux via assumption that you are one furlong (660 ft) away, lux = 10.76391 * lumens / (4 * pi * r^2) = ~318 lux.

      TLDR: So a burning LoC puts out roughly 318 lux at one furlong.

    7. Re:Full Moon is ~0.1 Lux by TheFakeTimCook · · Score: 2

      German opera playing very softly puts me to sleep quick.

      For me, it's Vogon Poetry!

  2. cover those LEDs by PopeRatzo · · Score: 5, Informative

    Listen you guys, I'm telling you this because I love you all:

    If you have a computer or router or modem in your bedroom, cover the LEDs. It makes a huge difference. Get it nice and dark in there and you'll get the best sleep of your life. Turn the computer off, and if you've got one of those goofy gaming mice where the LED lights don't turn off when the computer goes down, cover it with a dark cloth.

    Also, get yourself the dimmest possible night light and put it in your bathroom (and in the hallway to the bathroom if necessary). When you get up to whiz, don't turn on the bright bathroom light. You want to stay as close to sleeping as you can without peeing in your pajamas.

    Those circadian rhythms don't play. If you mess with them, you will start to feel like shit. If you become in harmony with the cycles of light and dark, you will find happiness, or at least you'll feel good.

    Seriously. I'm not fucking around. I even want the haters and losers to take this advice. Cultivate your sleep. Sleep is your friend.

    --
    You are welcome on my lawn.
    1. Re:cover those LEDs by arglebargle_xiv · · Score: 2

      Just use Liquid Electrical Tape (black rubber in liquid form). Fabulous stuff.

  3. risk of depression vs risk of eaten by a grue by Joe_Dragon · · Score: 5, Funny

    risk of depression vs risk of eaten by a grue

    1. Re: risk of depression vs risk of eaten by a grue by hackertourist · · Score: 2

      A can of Mace, a forty-five
      is all I'd need to stay alive
      but no weapon lies within my sight

      (Bill Watterson, A Nauseous Nocturne)

  4. Re:Light Leaks Through Forehead! by Narcocide · · Score: 2

    I recommend against full-contact sports.

  5. Re:Now justify US prisons and treatment of POW's by Anonymous Coward · · Score: 4, Informative

    Okay. Let's have the pedantic reason why they aren't the same. You know you want to.

    Prison: for storage of felony-convicted incarcerations, usually at least 1+ years
    - states and the feds have prisons

    Jail: for = 1 year low-risk felony sentences, misdemeanor-convicted incarcerations, and innocent people awaiting (sometimes multiple *years*) for due process in court.
    - cities and counties have jails

    Ask any former inmate which they were in--it's about like asking whether someone is from New Zealand or Australia.

  6. Re:My wife needs every light out by Bruce+Perens · · Score: 5, Insightful

    Grow a fucking dick and walk yourself to bed with a little light: small torch, phone screen, anything that suits *you*. If it happens to wake up your wife, tell the stupid bitch to shut the fuck up and go back to sleep.

    Hey, I've been married to a wonderful woman for 30 years. She's smart, beautiful, sexy, and she absolutely adores me and would do anything for me. Do you know how I got that?

    By not being an immature man-child like you.

  7. Nope by aepervius · · Score: 2

    But when you cover your eye, most probably you don't cover the bridge nose arch properly, up and down. This is the same trick people use to "magically" see stuff when having a blindfold, either stage magician, or scammer (which is why when james randy tested those pretend people seeing with blindfold, he made sure to properly cover above the bridge nose arch and below so they could not peak either above or below). In your case the bit of light filtering is enough. But your forehead is utterly opaque, trust me on that one ;).

    --
    C. Sagan : A demon haunted world:
    http://www.amazon.com/gp/product/0345409469/
    visit randi.org
  8. Re:can't take pich black hotel rooms by arglebargle_xiv · · Score: 2

    Same. Pitch black rooms drive me crazy, I need a minimum of some light, maximum I can sleep in direct sunlight. The only thing that upsets my ability to sleep is complete darkness.

  9. Sleep by tquasar · · Score: 3, Informative

    Darkness, darkness, be my pillow. I was a shift worker for years and had to try to sleep during the day. I warned my family I would be in a bad mood and to please forgive me. I put heavy dark curtains and pull down shades on the two windows. That helped but I could hear my sons playing and cars driving by so I wore earplugs. That helped. During the summer the room would get warm and I installed a window air conditioner. More noise. I slept for four hours then woke up. I still wear a sleep mask and sometime use earplugs at night. It;s one-thirty AM now .

  10. Re:Recommendations by Mal-2 · · Score: 2

    The adhesive on gaffer tape will dry out and leave a horrible mess in a matter of months to a couple years. Gaffer tape is intended for temporary rigging only, and you will get undesirable results attempting to use it long-term for anything. It's not even good for covering up gaps in the covers of black instrument cases. In the short term it works fine, but in the long term it makes the problem considerably worse by falling off and leaving a crumbly white patch where it used to be. Exposure to heat greatly accelerates this process -- if you were to use gaffer tape to patch torn upholstery in a car that gets parked outdoors, you could expect it to fail in as little as a few weeks.

    --
    How is the Riemann zeta function like Trump rallies? Both have an endless number of trivial zeros.
  11. Re:blackout by Farmer+Tim · · Score: 5, Funny

    I don't understand how people can sleep in those bedrooms with large windows without curtains at least not in summer time.

    You can find out easily enough with a telescope...

    --
    Blank until /. makes another boneheaded UI decision.