A closer look inside the lighting component. The coin-size yellow disk is the LED light "engine," a semiconductor which produces light. LEDs produce blue light so there is a yellow phosphor which covers it to produce a white light. The color of LED lights can be adjusted depending on what sort of phosphor is used.
October 7, 2011 9:44 AM PDT
Photo by: Martin LaMonica/CNET
| Caption by: Martin LaMonica
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