I have a 4' reefbreeder led light and I upgraded to a 180 tank. There is 12" on each side with the light centered. Will I need additional lighting? Light hangs 11" or so from the water. Thoughts
Depends on how you want to aquascape and what you want to keep. For SPS, yes you will need to extend the lights, for LPS and/or softies, you would probably be fine.