I have a 48" 8 x 54watt T5 Tek Light.
Ive never used it for anything but over my frag tank, but I like the light alot.
My only complaint about it, if there was one (And this could have been changed since I purchased mine, as I have one of the first ones released)
The way the lights are wired, you have 2 switches and they turn on the first 4 bulbs, and then the last 4 bulbs.
I personally would have preferred a staggered wiring, so I could split up the actinics and have them come on first and cover the entire tank, then a few hrs later have the whites come on.
Just my opinion, still a great light.