I googled it too. ha ha. Was curious. More or less kidding about the black part ha ha. The highest visible light range i saw was in the range of 28k. It was just a quick google. Sound about right?
Hey i got my t5 setup with bulbs from ebay brand new for $40 and its working out for me just fine. Corals are growing as they would under an expensive setup.
..46gal Bowfront Reef..
I have one of these 30" fixtures 4x24w. I don't think the bulbs are the greatest, but they are cheap, and replaceable. No problems with the fixture at all, it has worked well.
http://fishneedit.com/
-You had me at PWM
I've heard several good things about the fishneedit ones as well and a buddy of mine has one over his 40 breeder and it is doing very well.