I want to chime in on this topic with a different perspective then most would have. I am an electrician, I install lights, leds, drivers etc. all the time. I also go the wholesalers to put together lighting packages for different jobs. I know the cost of these fixtures and I cant justify paying upwards of 900$ (CND) for a Radion Pro fixture. Regardless of the LED brand, Driver brand, dimming vs no dimming the cost of parts in these fixtures is a fraction of the price you pay for these things.
Now I understand you pay for the development and the fancy cases etc but really? Its not worth it IMO, I would rather buy the chinese ebay fixtures and save the money, if I have to double them up im still further ahead. I just purchased 3 fixtures for tank for 500$. One AI SOL would cost me $399.99 I would need 3, one Radion (basic model) would cost $660 and again I need 3.
So lets work it out.
3 "No Names"--$500
3 AI Sol-------$1199.97
3 Radions-----$1980
Now even if I need to replace a full unit, or change out the drivers or a few LED's im still looking at less cost for the same effect. Maybe my corals wont grow as fast or become as bright but im a firm believer in the fact that this hobby should affordable for everyone. Not just the people who can dump $2000+ into lights without a flinch.
Just my 2 cents but until the cost comes down I think if someone finds a fixture in the price range that works for them, go for it they will all do the same thing, provide light for corals, just at different rates.