Almost a year ago I upgraded my ViparSpectra black box LEDs to the custom SB Reef Light boards. Since then I have seen slow but consistent growth in most of my corals. Anyway a friend of mine loaned me his BioTek Marine BTM3000 PAR sensor and decided I'd share my results. This is my initial run on my 75g with a center brace. The lights are on 2% white and 50% blues. I have removed some lens caps and I will include a picture of the lights so you can see which lens caps I've removed. The lights are about 10" above the water.