I would love to have a halide/t5 hybrid lol but whew my room would be a oven lol. I'm just more so concerned about coverage. I know they say a 18"x18" for sps with the xr15,so I think if I can get at least 250-300 at the top of my main island where I plan to keep my acro's I should be fine I suppose. The other edges of the tank is where everything else shall go.