I think Kessils make coral look better than any other light. I have a hybrid T5 system I built for my 400 that has 5 Kessil 360we lights down the center, 16 4' T5 bulbs and Reefbrites on the outer edge. The 2 Kessils I have available were purchased to build a hybrid Led for my 90 gallon quarantine. I was going to strip the center set of bulbs out of a 6 or 8 bulb powermodule and bore to 4 1/4" holes in the fixture and drop in the Kessil lights.
When I was looking for Powermodule I found a 8 bulb Hybrid Powermodule and purchased it instead.
I still think the Kessil light has better shimmer and makes coral look better than any other LED, just was easier to go with Hybrid in my 90 gallon quarantine that is in the garage.
If I could find a 8 bulb 24" dimmable powermodule I would still build this fixture because the down fall to the Ati Hybrid is I cannot program with Apex.
Anyway Kessil 360we are a great light.