i have just set up my 120(finally)and i am going to use 2-250(10k bulbs or 20K)halides and 4 atnic t5 geissman bulbs(54watts each).its a standard 120(48"x24"x24").currently i have mostly soft corals(zoas,kenya and different mushrooms),but also some lps(duncans,sun coral) and a clam.but at sometime in the future i would like to go to some sps.