I built a 36" DIY from LEDGroupBuy (Milad is awesome to work with), I then added a 36" T5 to it and want to add another, I couldn't be happier with my current set up. Another poster said it best earlier with don't try and flood your tank with par, I kept trying to dial it up, thinking more is better, but in the end, my tank looks much better running around 60%. The only complaint I have on my set up is the shimmer is just "so so", I am very envious of the Kessil 360's that i have seen in person, that shimmer is fantastic.