Okay in my planning/research process to convert a 75 f/w to marine I was talking to someone at a lfs. The consensus was that I should blow my wad so to speak on lighting....in effect to get the absolute best lighting I can afford and not to bother with compacts and light hoods per se. He told me that setting one like the orbit over a glass top changes the light spectrum??? I prefer to go with something like the orbit with 384w in a 48" length for this 75 gallon tank. I plan to keep live rock, soft corals and maybe some lps no spl corals. The methodolgy was that I could always upgrade my tank but that lighting is expensive and to get the best up front......thoughts anyone? *PEACE!*