My main tank has a kessil a350 purchased in 2012, an a360we and a brand new a360x - the x replaced an a360 purchased in either 2013 or 2014 that has been giving me issues. I can no longer change the spectrum and it blinks when first turned on. Still it's been repurposed to use as a coral qt light. I'll still use it until it completely burns out. The kessils are old but they are still growing corals. I have added 2 black boxes over the years to decrease shadowing, as well as repurposed an old dual T5 fixture for additional light.
Originally I bought that a350 as a test as led's were largely unproven. The 250w metal halide which was lighting the other side of my tank is now in use on my 90g (36x24 footprint). It's got a couple of led strips for additional light.
I have a cheapo T5 fixture over my frag tank, and a micmol led over my name - just wanted to try something different then a black box and it's a softy only tank.