the star polyps are growing pretty good with the leds. im not sure the tank looks bright enough for viewing though. corals are growing good, its just not pleasing to the eye. i did score a great deal on 2 helfrichi firefish $100 for the pair. they are doing great and stay out in the open all the time. i think im going to add another 24 leds to the heatsink and see how that turns out. i am very pleased with the pm comtroller i used for the light .