Build a Better Bulb for a $10 Million Prize
nytimes.com
nytimes.com
This place has ruined my ability to read 4 letter words.
Maybe it's not the right kind of white light. I know that LEDs have pretty low spread (they only cover 10's of nm in wavelength) and in order to assemble a good white light you have to have the right number and intensity of LEDs to produce the consumer-friendly color.
I remember reading an article about this somewhere, it was a little over my head but a pretty interesting read if someone has the link available.