I have a 2x2x4 120gallon tank. I currently have a Kessil ap700. In the middle on top of my rocks 6" below surface is 250 par. 6" from bottom is around 150 par and around 100 par on the bottom. I have a lot of shadowing. I have about 60 corals, most all lps. I was looking at adding the 36" T5 hybrid that BRS sells. I am not sure how much that will raise my par. I don't want to kill what I have but. Not sure if this will help increase growth. I am interested in all comments.