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Don't chase numbers with this lamp. I played enough for them in all respects. Raise to 35-45 unambiguous centimeters. Example, acrapore Pink Floyd grows well and has good color. He is on the lower level with akanas. And there is 250 par. Although under t5 it is placed closer to the light.Had a question for you guys if I should raise the height of my orphek or leave it as is. I have it 10 inches above the water line. BRS reviewed the light and recommends 15" above the water. I tested PAR at my SPS half way down my tank which is 20" tall and the most intense spot on the rock center of the light is about 350-400. Channels 1, 4 at 50% and channels 2,3 at 100%. Based on the video I thought it would be way higher but it looks like my unit doesn't push those real high values. Is there a need to raise it to that recommended height or keep it as is if 300-400 is the goal for SPS at this location?