@Marty Fleskes my tank is 22 deep, 18 wide. I have the ic orbit pros, 2 lights. Lights are 7 inches above water and so far, the corals on the bottom are doing good--2 types of gps, just added 2 sps's on highest rock (acro & stylophora) and they still have great PE. Duncan halfway down growing already, 2 micro's, half down, seem okay. Torch, almost to bottom is very happy and this is with egg crate covers which eat up some light. Also have a sedosa montipora and reverse sunset about half way down and they have good PE. Just got my brs netting/cover kits to replace the egg crate. So far so good. I don't hve the lights up all the way. Can post here my settings if you are interested. Still debating lowering lights to 5 inches but will give it some more time and get the clear net covers on first before making changes. And give the 2 sps's time to see how they do. I love the ease of programming, though it took a bit to figure it out. The light hub is a bit flaky but the company is sending me another so great customer service. And the ability to control up to 3 powerheads with the loop system also makes it nice. I have 2 and both are only about 30%. Price was my main reason for choosing current along with the loop controller and the fact that the lights have ramp up and down which I wanted. The cheaper black boxes are either on or off. We also wanted brackets, not hanging. Eventually maybe I'll add a canopy and we'll have to mount them. And maybe eventually I'll need to add a 3rd light which I can do with the brackets or in a canopy. I figure I'll see how it goes for 6-8 months or so