I got a Kessil A360W with the gooseneck and the 90 degree adapter. My new tank is a 93gal cube that measures 30"x30"x25.5"deep. Will one of these lights be enough or should I have two. I have a mixed reef currently and want to make sure everything will be happy in the new tank.
By concentrating all the LED's most makers get a somewhat inflated maximum PAR reading....it only covers a small area in the center where all the LED's overlap their coverage.
A similar reading on a strip LED light will imply that coverage, evenly, for the whole length of the light.
So, by the numbers I think you're set with one light. The question is about shadows and coverage, and that depends quite a bit on your plans for the rocks, etc.
I would start with the one you have and upgrade if you feel the need....you just have to be willing to possibly make the adjustments to coral placement if you make changes later on.
Don't attempt reef lighting without a light meter by the way - there's no reason to go without a light meter!!.
A $free lux meter app (like "Galactica Luxmeter" for IOS, for one example of many) is the place to get started since it's $free. But upgrading to a $15 handheld LX-1010B lux meter from eBay or
amazon, etc is smart....better readings and safer to use around saltwater!
Most corals will be happy at or around 20,000 lux...maybe up to 40,000 lux being the safest zone. But technically even stony corals can live and thrive from around 10,000 lux up to 80,000 lux.....there
