Well these are far from Radions. This is their posted PAR depth levels, and I have two strips side by side. I have about 21" from the lights to my sandbed. So, yeah, I'm figure with these lights to max them out now to try and get the best PAR I can. I didnt invest a lot into this 40gal bow front reef, my next tank will have better lighting. But, I feel this strips have been sufficient. Thats an older full tank shot with lights on.