Ah, didn't notice how deep your tank was. According to the BRS tests the Kessils do a pretty good job at overlapping when spaced at 18". That combined with the 6 T5s should give decent coverage. FWIW the Aquatic life fixture with 4 bulbs and 2 360s provided a ton of PAR on a standard 48" x 24" tank. You could always try the kessils alone and add the hybrid fixture later if needed.Well, the Sunpower is only a 6 bulb fixture, so at 13", maybe I could get 20-24" coverage with it, but that leaves another 12", so it would be all T5 in the back and all LED in the front. So I was hoping to get a little bit of both worlds and blend. But I'm just not sure how well the fixtures would blend if I picked up 3x a360we over 36"? I'm thinking the Kessils at best would give a 18" coverage, which would overlap in the middle.