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Nichia is also a manufacturer of phosphors, and is credited with the idea of making white light by blending blue from the LED with a broad-range phosphor, similar to the way that fluorescent lighting works. The phosphor is Ce3+:YAG (cerium doped yttrium aluminum garnet). The yellow color of this phosphor contributes the red and green portions of the spectrum, resulting in white light when combined with the blue LED.
PTM Published on: 2011-11-02