I had my reef club's par meter (Apogee MQ500) last week and captured PAR numbers for the Mars Aqua 165w hanging over my frag tank.
All measurements taken at 5" below water line.
So, over the past year I've been changing LEDs and lenses to find a good spectrum, light dispersment, limited shimmer and most importantly less "disco" effect, on my 165w wifi black box. I think I've found a combination. I decided to keep the 120° lenses and mixed 90° beaded and not beaded...