This Turkish Delight Finally Gets the LED Out | Seventh Generation
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This Turkish Delight Finally Gets the LED Out

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4 comments
Author: the Inkslinger

If you think compact fluorescent light (CFL) bulbs give your energy budget a big bang for its buck, wait until you see what light emitting diode (LED) lighting can do. Except that the operative word there has always been “wait” because that’s all we’ve been doing: so far scientists have only been able to create ultra-efficient LEDs that shed light in certain colors. It’s possible to coax nice rich white light from this technology but only by sacrificing most of its energy savings. In fact, the closest anyone has come to an Earth-saving LED you’d actually want to use in your home is one that produces a cold bluish glow and makes anyone standing under it look like a casting reject from the latest George Romero zombie epic.

Now comes the word we’ve been waiting for. And it may mean we won’t have to wait much longer.

According to New Scientist, Turkish researchers have found that if they coat blue LEDs with a layer of metallic nanocrystals, they get a light that’s right and a bulb that may change the world. Consider: a regular incandescent bulb emits somewhere around 15 lumens of light per watt of electricity used. A CFL does a lot better, producing about 67 lumens per watt. But these new LEDs? Would you believe 300 lumens per watt? That’s the equivalent of a conventional 100-watt bulb for just 6 measly watts.

Following John Muir’s astute observation that everything in the universe is hitched to everything else, we can see that the use of such hyper-efficient technology would make it a lot more feasible to use renewable energy at home and abroad. Sources like solar, wind, water, etc. typically don’t produce a ton of power. But if we’re combining LED bulbs with other available energy-conserving technologies, they wouldn’t have to.

The development calls forth rapturous visions of a day perhaps not too far off when we can light up our homes and our cities and everything in between like a Christmas tree on steroids with nothing in the way of carbon emissions or energy bills or even new bulbs. LEDs typically last for somewhere in the neighborhood of 100,000 hours. That’s over 11 years of non-stop use. Put an LED bulb in your living room lamp and your great-great grandchildren may be the ones to change it.

Clearly, this is a potentially huge development on the energy front. But the operative word there is “potentially” because this story naturally has some fine print. Namely, that the crucial nanocrystals aren’t yet easy to produce. It takes a bit of work to make one of these LEDs glow, and that’s not what we need to put them in every fixture on the planet. But the first step has been taken. And that always means the future isn’t far behind.

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Comments

nwad picture
nwad
04/27/08
So I don't get this. Only 2% of theses bulbs are getting recycled. Our local, state, and fed regulators are doing nothing to address it. But it is now federally mandated that only cfls will be manufactured in the future. When these traces of Hg hit our ground water, we're in for a nasty surprise. When mercury is in your water, its toxicty expands exponentially as its chemistry changes. We broke a bulb in our kitchen. I freaked out as my son has autism and can't detox heavy metals (alzheimers, parkinsons, autism, and add/adhd are linked to the increase of Hg in our environment)and called the posicon control hotline. They told me to vauum or sweep it up and that it's such a small amount that it would be harmless. NO amount of Hg is harmless and vacuuming/sweeping is the worst thing to do. It turns it into mercury vapor and contaminates your vacuum and house. Wear rubber gloves. Wipe it into a contained spot and dab/push it up with a rag. Throw all rags, gloves and the clothes you are wearing away. Take a shower. If its on carpet, its best to remove the carpet. I've heard you can test for traces of it with sulfur powder, but I haven't been able to find it anywear?
cmbroth picture
cmbroth
04/24/08
I wouldn't worry so much about that CFL in the street as much as the 23 bulbs at a time that my local businesses put in their dumpster. If it worries you as much as it seems, go talk to all your local businesses and make sure they aren't throwing away those long tubes that contain much more mercury than your household CFL.
joaks77 picture
joaks77
04/12/08
Although a broken bulb needs to be cleaned properly there are two other factors involved with the mercury story. The first is that the amount of mercury in a bulb is about the same amount that you save by not burning as much coal for electricity. So if you throw the bulb away instead of recycling you have not added or saved mercury from the environment. Second, there are very low mercury and possibly mercury-free bulbs available.
jt772 picture
jt772
04/12/08
I am so sick of reading these "glowing" recommendations of CFLs without addressing the fact that these lightbulbs contain mercury! In Maine, it is now illegal (against building code) to put one of these in a child's room. Yes, they save energy, but think about what mass use of these bulbs will do to the environment. I saw a broken one of the side of the street right near a sewer drain. I felt so bad knowing that no doubt all the mercury was washed down the drain and right into the streams and lakes. So sad. I feel like its the Emperor's New Clothes when it comes to CFLs