48x18x24, 30x30x24 or 36x24x24 dimensions? I'm running an 8bulb ATI sunpower on a 32x24 tank with a single reefbrite and I really like the coverage and colors it gives. Granted there's not as much control over the color you would get with LEDs but the setup was cheap (about $350 after buying 10 new bulbs) and so far the corals have been responding well to it. Not sure if it's still availabe but there was a 4ft ATI for sale not too long ago on here