2009-05-11

San Ramon Considers Replacing Parking Lot Lights and Street Lights with LEDs

The City Council of San Ramon, U.S. will consider another application for federal economic stimulus money for a $215,600 grant to replace city parking lot lights and street lights with energy efficient LED ones. According to a city staff report, installing the energy efficient lights could reduce city energy costs by 50 percent. LED street lights also last 50,000 to 80,000 hours longer than traditional lights.
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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 MORE

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