I'll put this out there and by quick since you already have so much feed back. I have 6 AI Prime HDs, 4 over my Red Sea Reefer 350 and 1 over my IM Nuvo 20, and another 1 over my 10g frag. I absolutely love the AI lights and wouldn't have chose a different option. I find that they put out good PAR, color up all corals (SPS and zoas), and are extremely easy to use. I fun mine at about 70% and am getting 200+ Par 8 inches below the water, and 80-100 Par at the very bottom of the tank.