Craig McCluskey wrote:
> 
> No, white LEDs have three diodes, one red, one green, and one blue.

Many of them I've seen are internally blue, with a white (phosphor?)
coating. My flashlight has a 1W white Luxeon Star emitter, claimed
to put out 45 lumens. The phosphor seems to cut efficiency.

I have seen household lamps that have multiple emitters blended to
approximate white light, but they all seem to lose efficiency to
resistors because they don't have enough LEDs to use 120V.

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