Slashdot Mirror
Questions Arising On Mercury In Compact Fluorescents
Patchw0rk F0g sends in an article from MSNBC on how some environmentalists are having second thoughts on compact fluorescent bulbs. Their relative energy efficiency is unquestioned. The problem is the mercury — enough in one bulb to contaminate 1,000 gallons of water, even in newer low-mercury bulbs. The EPA has an 11-step cleanup process to follow when you break a CFL in your home. The specialized recycling facilities that are needed are thin on the ground — about one per county in California, one of seven states where it is illegal to dispose of CFLs in the general waste stream.
This was on the BBC some months ago.
They were relatively reassuring about the health implications:
Something to be aware of, but not hugely worrying.
If you are in an office or school, look overhead and determine what type of lighting you have. There are a lot of places where it is fluorescent lighting in the long tube format.
Said tubes also contain mercury. But few, if any people, seem to consider these as part of the mercury contamination controversy.
If these tubes aren't a problem because they are disposed of properly, couldn't the CFLs be put into the same disposal chain?
And if the tubes ARE a problem because of improper disposal, shouldn't they also be mentioned along with the CFLs?
Mercury is NEVER EVER Nontoxic.
It cannot be made nontoxic (despite what the amalgum "alchemists" of dentistry will tell you.)
The ADA will lie to their graves about Mercury's toxicities in the body from the mouth and lungs the lungs. HCL acid, AKA "stomach acid", does a great job of dissolving swallowed Mercury fillings and their residues readily dispersing the Mercury into the bloodstream.
Definitions of harmless vary.
Mercury vapor is heavier than air, it will not just float away.
Please read the MSDS for Mercury..., any questions?: http://www.jtbaker.com/msds/englishhtml/M1599.htm
Gallium OTOH is a much more expensive and LESS toxic alternative in some devices, but not all.
500kg of mercury is less than 10 gallons and that's the same as 100,000,000 CF bulbs.
If you eat 11oz of Yellowfin each week, you'll consume the same amount of mercury as eating 1 CF lightbulb each year, or 4oz of swordfish each week.
All it takes is 1 company not to do this, and the rest of those who do are screwed. When you buy a "bulb" every 6 months, you'll ask me what kind I buy when I tell you that I've bought one in my entire life.
Additionally, a lot of people are looking at LEDs like regular lights. They are not. They can be flexible, shock resistant, and sealed tight. They are ideal for putting light in places where we've never been able to put bulbs before. In floors. In counters. In sinks. In walkways. In door frames. As desk surfaces. You can make your slightly raised door sills out of a low-brightness LED so that they are visible to people going through. These aren't things you will ever want to replace. While very energy efficient, I think that large-scale LED production will significantly change how we light things, and those changes will necessitate "bulbs" that never burn out.
Of course, there will still be LED "bulbs" shaped like light bulbs, which fit into a standard socket. And I'm sure that some brilliant company will do as you say, and program in death. But the strips of "TruSun Dimmable"(tm) LEDs you have installed around the perimeter of your room when you re-do the ceiling won't have this "feature". They will be there for your grandkids to see.
Velociraptor = Distiraptor / Timeraptor
> A lens can diffuse the beam, and they currently exist in red, green, and blue forms that could
> be combined into the proper color temperature.
That won't work. There is a good reason white LEDs aren't just tri-color LEDs without seperate leads. See the slashdot story from this weekend about the artist exploiting the monochromatic light of LEDs to produce interesting effects when illuminating paintings. If you mix primary colors to get yellow paint, paint something with it and shine a yellow LED on it you see black. Oops! Guess that is why white LEDs use a deep blue or UV LED with a fluorescent coating inside the package. A LASER diode would of course be an even more extremely monochromatic light source than a normal LED, plus the unexpected problems of illuminating ordinary scenes with coherent light.
Democrat delenda est
If your electricity comes from coal, the power saved by a CFB prevents a greater amount of heavy metals (including mercury) from being dumped into the air, water and ground downwind of the coal plant. I like eating fish, how about you? This argument won me over, I hope it was not a lie designed to sell me a bunch of expensive light bulbs.
The service life of CFBs and regular bulbs makes me suspicious. CFBs do not last much longer than incandescent bulbs used to. I've had 2 of 12 burn out over a year or so despite the 5 year promise on the box. Incandescent bulbs used to be that good and halogen incandescent bulbs still last longer than CFBs. Ask yourself when the last time you changed your car headlights was.
Friends don't help friends install M$ junk.
I agree with Twitter. Quote: "If your electricity comes from coal, the power saved by a CFB prevents a greater amount of heavy metals (including mercury) from being dumped into the air, water and ground downwind of the coal plant."
This is not the first time a Slashdot article has misled us about mercury in compact fluorescent light bulbs. See this comment from a year ago: Misleading article. Quote from the second link in that comment: "China is also the world's largest emitter of mercury..." China's coal-fired plants emit TONS of mercury, and the mercury travels everywhere.
Is someone at Slashdot paid to post these articles, to sell LED or other lights? Or is it just ignorance?