Ran across this article this morning...veeery interesting implications for LED lights. The end of 'cold' white/blue LED light and the beginning of better rendering 'warm' LED light...stay tuned.
http://technology.newscientist.com/article/dn13266-crystal-coat-warms-up-led-light.html
http://technology.newscientist.com/article/dn13266-crystal-coat-warms-up-led-light.html