i run mine about 15' from the water line and use the program i got from RC ReefBreeders site. Mine peaks at 85% (blue) 65% (white) for 3 hours using 3 IT 2060 on my 220gallon tank then ramps back down. I am getting awesome growth from mid tank and up . i have zero algae growth in the DT, i also run bio-pellets and UV sterilizer