I've got the reefbrites mounted in a tek light on my tank.
Here's the thread with the installation... looks very slick
http://www.canreef.com/vbulletin/showthread.php?t=67874
I just added some SPS a couple of weeks ago, you can follow the progress (and future growth under the reef-brites) in my build thread here:
http://www.canreef.com/vbulletin/showthread.php?t=65983
Overall I'm very happy with the lights. In hindsight I might not've gotten the 50/50 and instead just picked up an all blue and all white. But it's tough to say without seeing the various combinations firsthand.
I like having the T5's integrated with the light so I can change the colour inexpensively and add spectrums that I wouldn't see with strictly LED's