I would also check the library forum under lighting.
This the same thread that TG has linked up above. I inadvertantly irritated Sanjay Joshi and he wound up replying to the thread to correct my misconceptions. This is for pg 26 where he posts some links for his newer tests and theri results. Try about half way down, the first series of links don't work for some reason....
http://reefcentral.com/forums/showth...agen umber=26
Nick