The U.S. ban on 40W and 60W incandescent bulbs put into effect by the U.S. Congress January 1st is an effort to promote more energy efficient lighting, such as CFLs and LEDs.
For three decades, white LEDs have depended on rare earth materials such as yttrium aluminum garnet (YAG) layered onto a blue LED chip (Figure 1). Seoul Viosys Co., Ltd. (KOSDAQ: 092190) today announced that it has broken that dependence. It h... READ
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