What percentage intensity was he set at? I'm at 75% with diffusers.So I just got back from lfs. Their 15 blues are mounted 24" above the tank. Tank is 12" deep. He was getting 200 par directly below the light and 170 between 2. That seemed high for that height as mine will only be 8" above the water but its what his par meter read.
They were not set at 100%.
I do like the look of the blues and have only seen gen 4 versions at the other lfs.