I've had Chinese black box lights, Nanobox mini, and now AI Prime 16 HD.
I like the Prime HD. I wish the app was better. I don't have disco issues, but I run them 9" above the water and run red/green at only 5%.
That said, I think Kessil's are the best and I've always viewed Radeons as overkill and too expensive for what you gain.
However, Kessil a360we's are $350 a pop plus you need a $100 WIRED (? right) controller.
So for my purposes, I'd have needed to spend $800 for 2 Kessil's + controller where I spent ~$550 for 2 AI Prime's that have built in control via a mobile app over wifi.
I'm too cheap with these things -- so I couldn't justify the extra $250 even though I do think the Kessil is a superior light. I just don't think its that much more superior to justify the significant cost bump.
I feel like BRS shill in saying this but I do think that the most cost effective light setup for a capable of growing anything mixed reef is the t5 + AI Prime setup.
That is 180 par in the corners 18" depth with the lights 9" above the water -- unless you are planning to grow acros on the sand bed, its plenty of par. Kessils would be capable of bumping it a notch, but the bigger thing is that the dense array light provides the most natural looking spectrum -- no chance of disco lighting.