So you guys are trying to tell me that as far as what the kessils offer compared to ecotech and aqua illumination is comparable and similar? Forget the features and wifi capabilities. Kessil has the shimmer yes, makes corals pop nicely yes, intense, and popular but I don't think for a second that I would ever consider choosing kessil over a radion. Radion is significantly a better light, better spectrum, more par, forget that graph it may be biased coming from the source. But be that as it may I believe that radions and hydras do a much bettee job growing coral compared to kessils. Not knocking kessils down but it is what it is. You have blue and white leds, a single source of light. You have shadowing effects. I've had kessil I know. But do as you may. I think those who have hydras and radions will agree that's why so many people sell their kessils "wanting to try something different" for $399 for a kessil that sits at 90watts and xr15 for 95 watts eh not big of a difference but you get those other colors, you get the controllable features through reef link, not to mention better color blending through the new optic lenses. You won't be disappointed with neither lights. But truth be told those who have had both will surely agree.