High bright and white light emitting diodes(LEDs) were fabricated. White LEDS are the fovrth color made for commercial use following blue, green and red. White LEDS typically have the efficacy of I O ImlW and the color temperature of 3000K-1 OOOOK. This new technology was achieved by combining blue InGaN LED and YAG phosphor. Compared with incandescent lamps, advantages such as wide color variation, Iife beyond I OOOOhr, no burn-out, reduced sensitivity to variation and little heat generation are expected.
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