2015-06-08

Utility Substation in U.S. Transformed into Lighting Art

Against the night sky in Redmond, Washington, U.S, an electrical transmission tower stands out in a surprisingly beautiful way. Thirteen rings of LED light encircle the tower, illustrating the sequence of the Kelvin scale, which expresses the color temperature of light: red at the bottom, moving through orange, yellow, warm white, then cool white and, finally, blue at the top.
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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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