Yes easy , but I’m unsure if you’d need 2 or 3 over a 90g does your tank have bracing bars or not if yes then I would hang 1 light per section .. too reduce any shadowing !
Thank you yes it has a middle bracing I don’t have the tank yet it’s one I’m going to be looking at the tank had two of the sb 16 leds in a custom canopy running off an reefkeeper elite controller