WE bought PFO Solaris LEDs at IMAC. H series, 4' length. We put them on the tank on the 28th of last month. I previously had compact fluor., so, acclimation is a slow process, so not to bleach anything. We started at 50% power, and have increased in 10% increments. Now up to 73% on the day whites, and 38% 0n the day blues. Corals that had been receding are coming back. it will be a few weeks yet til at full power.