First off, I am providing my data that I have collected since there isn't much of this information floating around about the Kessils, you would know if you have done half the research I have about them. I am not bashing Kessils, they have done well with many of my Zoas and Lps. I am just saying if the intensity isn't there on a extremely shallow tank, why would you expect sps to thrive in a standard depth tank.
Secondly this is not my first rodeo I have kept many nice acros in a previous tank under 250 watt radiums. This is my first attempt at leds. I have kept all sps directly under the Kessils with no shadowing in the highest intensity hotspot. I am in no way attempting to fully light and grow corals everywhere within the total footprint of the tank, nor had the expectation to with two Kessils.
My apex and testing logs will show that my parameters are within the correct range and do stay much more constant than many successful sps tanks. Flow is strong and randomized and pests have been dipped for initially with Bayer and any test dips have shown clean corals.
Just because I ask questions and make observations and mistakes does not indicate that I "don't know what I am doing." In fact I have probably been doing this a lot longer than you.
And yes, uv does inhibit photosynthesis, hence corals attempt to limit this effect to their zooxanthellae crop by creating the pigments that drive the myriad of coloration we desire so.
http://www.sciencedirect.com/science/article/pii/S0098847209001580
Apogee provides correction data for led lights to calibrate your readings with however, but the conversion rates are nominal and base reading are more than accurate to get useable data for coral placement.
Don't be a dick to people who ask questions and provide data and experiences so that others can benefit... Even if it isn't beneficial to you, it may help others.