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Looks like a good part list!
So are you planning on 12 or 24 LEDs? I think if you do 12 over a 40 gallon, you'll have a lot of spot lighting issues, but this will mean much much more shimmer.
If you do 24, sure it won't be as bright but you'll get a better spread.
With 24 LEDs at 650ma at 22 inches, you'll probably be into the med/med-high range. (i'm basing this off my old set up, 24 epistars [which are less efficient than the crees, but ran at 700ma] and at about 24 inches off the substrate, I was hitting about 40umols of par at the substrate.)
if you're not going to do co2, i would suggest lifting the light up higher.
So are you planning on 12 or 24 LEDs? I think if you do 12 over a 40 gallon, you'll have a lot of spot lighting issues, but this will mean much much more shimmer.
If you do 24, sure it won't be as bright but you'll get a better spread.
With 24 LEDs at 650ma at 22 inches, you'll probably be into the med/med-high range. (i'm basing this off my old set up, 24 epistars [which are less efficient than the crees, but ran at 700ma] and at about 24 inches off the substrate, I was hitting about 40umols of par at the substrate.)
if you're not going to do co2, i would suggest lifting the light up higher.
