Just watched part of the BRS video featuring my LED fixture, the ReefBreeders Photon V2+. BRS just recently started selling the fixture. I went with this light when I rebooted because of past experience with ReefBreeders, great quality, great customer service, etc. I also knew I would be mounting the fixture inside my canopy and went with the 50" based on Logan's recommendation. My flasher wrasse likes to go airborne, and I plan to add another wrasse or two later on, so the canopy stays...no doubt there.
The video goes on to discuss par (I don't speak par), light spread, recommended mounting height, etc. Very informative. What I learned was that at 100%, I would fry every acro I have because my light is mounted 8 inches off the water. Well, because it's in a canopy. They tested starting at 6 inches and found the optimal height for the 48" fixture to be 16 inches off the water line. Obviously, I can't do that. Am I pleased with the light? Yes. Am I getting good growth and color? Yes. I can't imagine running that light at 100% and I'm sure I never will. I'm currently running the blues at about 50% during the max period, violet at 40%, white at 35%, and red and green at about 15%. I plan to bump up to 55% and maybe 60% on the blues, but I'm doing that very slowly. Hopefully, I'll remember to follow up on this 6 months from now!