Glad to help. I'm not an expert on SPS but if you have 400+ par in the water several inches below the surface, you should be fine. Just don't bump the intensity to fast. Make sure you acclimate the corals slowly to the light. Especially if you are making adjustments. FWIW, Par meters don't read the bluer light above 400nm as well as they do whiter light below 400nm. As you get more blue, the meterrs accuracy declines. There is compensation built into the par meter for blue light but the bottom line is that good led's are more powerful than the par meter will lead you to believe. Also, most of our corals get the majority of the photo synthetic radiation from 420nm+. The bluer the light, the less visible the intensity is to the human eye and the par meter but that doesn't mean the corals are using that and in fact, you can easily burn the corals if you aren't careful. Thus the need increase intensity slowly. Just because it isn't bright to your eye or even the par meter doesn't mean there isn't a lot of light for the corals.