Tony, what interface is that with the spectral graph? It's been a while since I've had an AI light, but for me, the biggest issue always was your settings were numbers rather than a spectrum. Looks frekin' slick.

I have a 15k kessil 150W running 15'' off my surface. That dang thing must be putting out a ton of par because my anemones have been hiding from it and even though kessil rates the spread as only 18'' I'm getting easily 24''. I run the light 12PM-8PM every day.