I just put a single 48" sunblaster t5ho & ati coral plus on my tank. the fixtures are real slimline but you have to come up with your own mounting options as they only come with some clips for hanging or screwing to bottom of something.
EDIT
Actually there are multi hanger brackets for these, can connect all together and have 1 plug or imagine the sun up sun down options you have with multiple cords....
Also if 1 goes bad, pretty easy to swap out.
