Currently I run a 20in 28 watt 50/50 corallife...Tank is doing fine, but growth is slow. I currently ran across a 20in 2x40w Satellite Dual(by current USA) with Dual Actinic (420nm/460nm) and Dual Daylight (6,700K/10,000K) bulbs and fixtures come with a fan and two switches for dawn/dusk...