> OK, I rephrase: I personally have yet to see a "white" LED that wasn't 
> actually pale blue.

That's because you're used to "normal" light bulbs that are very very yellow 
(just try taking a photo indoors with the camera on "outdoor" setting and 
you'll see what I mean).  It's not that LED manufacturers can't make this 
colour, it's just there is no demand for it (backlights for LCDs need a much 
bluer white than normal light bulbs).  If you want to make a yellower colour 
yourself then you can make your own yellow phosphor to put on a blue LED, or 
just place some yellow LEDs around the white ones :-)

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