They're great lights but with the depth of your tank you may be limited with what you can keep coral-wise. You can certainly keep softies and most LPS with that type of lighting. Probably not SPS (unless you kept them up really high and even then you might not get any good color out of them) and I don't think you could keep any clams in there as most need metal halide lighting. Theres certainly a wide range of other corals you could happily keep in there though, neat tank!
