I have a deep 65g tank and am currently running 2 redsea 50s. I'm hearing they don't pack much punch. I'm new to the hobby and have started a mixed reef. I'm considering adding a 21" AI glow for the additional spectrum range. Any advice or suggestions would be appreciated
You sort of need to know where you start and what you want to prioritize.
According to Red Sea an estimate of par is about 150-ish at 20" tank and light 8" up.
100%
So 28 total inches light face to substrate.
Keep in mind they look dim due to being like 80% blue.
If you shut the white channel off you lose roughly 20% of that par.
Main peak is about 450 with some approx 410/385 but not much.
Well relatively not much since you can't control the blue peak.
Too lazy to find actual wavelength at the moment.
So your first choice is which side of 450 do you want to supplement.
BRS believes an equal spectrum from about 410 to 470 is ideal for overall color rendering
What you probably shouldn't do is add more 450.
Adding to the left will likely increase fluorescence
Adding to the right will add some brightness and push the suppressed flourescent colors
This explains it better..