I have a 90 gal standard tanK with a canopy. Any advise on kessil a350 or 350w. I will be useing 2 of them. I have approx 10" of space above the water.
Definitely need wide imo. I'm running two 360w with 4 bulb t5 added on my 90. Mine are 7" above the water. Higher than 80% intensity starts to burn my sps that are up near top of tank. Wouldn't recommend the narrow beam unless you're hanging 20" above or more, or want some good shadows for some lps and chalices.