I have three 160's on my 22g and I just bought two AP700's for my 90g shallow that I'm putting together now. There's absolutely nothing wrong with these lights, but I find that people tend to "play" around with settings and that's where everything goes wrong. LED's are a different beast when it comes to reef lighting. I think Kessil removed the "tinkering" aspect with these lights by giving you the spectrum that corals need and you just set the color to your liking (visually) and intensity is based on the coral's demand, sps, lps, softies, etc...
Yes, there are shading issues with single point light sources, but those can be addressed by adding more fixtures, supplementing w/T5's or placing corals between fixtures. Also, shading happens in nature, but in our glass boxes, the conditions aren't always optimal, which causes other issues.
After having these lights for over 2 years, I've concluded that color settings under 50% work best (in my tank) and the PUR % goes up the more blue the lights are set.
The last factor is intensity, people set it based on visual brightness, which never works out in their favor. Start low and slowly, very slowly turn up intensity, only a couple percent a month. Anything faster than that will result in shock and then it's a long recovery or white-out.
Don't fear, Kessil's are great lights, but with anything, you have to understand how they work in order to be successful. Just because someone has MH's, doesn't mean they're going to be successful at keeping corals. Which brings up another point, we keep water, not corals.
Sorry for the long rant, but I constantly read users bash a product without either owning it or blame it for their misunderstanding or misuse of the product.
Okay, that's all for me.
