No Joke, Bulb Change Is Challenge for U.S. - New York Times: "Manufacturers are putting a lot of stock in light-emitting diodes — or L.E.D.’s. They operate with chips made of nontoxic materials and last for about 50,000 hours, compared with 1,000 hours for an incandescent and 6,000 for a compact fluorescent. A tiny L.E.D. can shed as much light as a cumbersome bulb, which makes them easier to integrate into a home’s d�cor. And, they are extremely energy efficient."
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