I currently have a 29 gallon reef with 4 36" t-5. I just bought a 250 watt coral vue halide ballast with 20k bulb and lumen bright reflector. The halide is for my new set up that i am working on , a 93 cube. What i am thinking of doing is putting the halide over the 29 and start acclimating the corals to the light. I was thinking of starting the light higher up and lowering it. Just looking for other peoples opinions.