John Platt, August 07, 2009
By now, you've probably replaced most (if not all) of the light bulbs in your house with energy-efficient CFL bulbs. But there's a newer technology on the market that will use even less energy, last longer, and offer even greater environmental benefits.
LEDs (light-emitting diodes) use signifantly less energy than even CFL bulbs, and promise to be useful in a huge variety of applications. But so far, getting good white light from LEDs has been a challenge. Nexxus Lighting has solved that problem by coating their new LEDs with quantum dots, a nanoscale semiconductor material, that glows white when energized.
Sold under the name Array Lighting, these new bulbs contain no mercury or lead (a problem with CFLs), work in all current light fixtures, are made with recyclable materials, and can last up to 50,000 hours each.
Of course, innovation like this comes with a price: these bulbs cost in the neighborhood of $100 each. And you can't just order them online from the manufacturer (grrrr), you need to find a dealer in your state. (For me, the closest dealer is 156 miles away, which isn't a very green solution.)
Still, this is cutting-edge stuff, and we'll not only see more bulbs like this in the future, but they'll be available in every Home Depot and Wal-Mart in the world. Until then, we can look at the Array Lighting web site and dream...