I'm really pleased with the Radion Pro---and while I don't know the Kessil rig, I can say after the recent disaster and the need to come up from a weeklong blackout, it was so nice just to plug in the laptop, insert the USB from the light, and tell it, with one or two clicks,'acclimation', set lighting down to half, which will now ramp up over a week's time to the original setting, and let my corals recover without a hassle. This is day 2 of the program and I can see the change it's making, just a tad brighter, and the response from the stressed corals is good.