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The battle between CFL and LED bulbs may finally be over thanks to researchers at Cambridge University who have developed a $3 LED bulb that lasts for 60 years. The bulb, which is smaller than a penny, is 12 times more efficient than tungsten bulbs and three times more efficient than fluorescent bulbs.
Cambridge’s new 100,000 hour, mercury-free LED bulb uses a man-made semiconductor called gallium nitride that is grown on a cheap silicon wafer. Previously, gallium nitride has only been grown on pricey sapphire wafers.
According to researchers working on the project, the first low-cost LED bulbs could be in stores as early as 2011.
Photo Credit: Graham Turner
Ariel Schwartz was formerly the editor of CleanTechnica and is a contributor at Fast Company, Inhabitat, Triple Pundit, SF Weekly, and NBC Bay Area Online. A graduate of Vassar College, she has previously worked in publishing, organic farming, documentary film, and newspaper journalism. Her interests include permaculture, hiking, skiing, music, relocalization, and cob (the building material). She currently resides in San Francisco, CA.