Is 8x55w pc + 2x36w pc + 1x36w fl enough to maintain SPS in my 4x2x2 tank? I plan to put all SPS to the top of my rockwork so that they can receive more light. I do not wanna get MH b'cos of the heat and i am not prepared to buy a chiller. Any ideas how to keep SPS at a low cost or is there no other ways except MHs?