I run 2 Kessil A360w's with 2 2-bulb T5's in my canopy on my 75. The setup is similar to a MH/T5 fixture. The shimmer is excellent, even when running two super bright coral plus bulbs. The T5's definitely take away from the shimmer compared to just the Kessils on their own, but I feel the benefit that the corals get from the T5 outweighs it. I leave the T5's running while I am at work, and the Kessils are on when I wake up and when I get home. The power savings is huge compared to MH.