I used to have these lights on my reef back in 2009. The model I had was the KR92. They were and still are one of the more powerful led units in the market, easily outperformed TMC in terms of PAR output. The fans at the time were not silent and they were not dimable back then.
I went to Weston Marine Life, the guy there was a real hobbyist, not just a business man.
Still now I think there are other units on the market that I prefer.