Thinking I might need the it2080 (32") x2 . To cover the 72" length . As well as the it2080 has 99leds compared to it2060 has 51leds . I want to keep a mixed reef but trying for mostly sps. I was going to supliment with a couple 4' t5's , just because of 30" width.
Thinking the it2060 might not be bright enough ?
Thoughts ???

I am presently running two 2080 on a 72" 180 gallon. I have a mixed reef with SPS and LPS and a mixture of zoas. I like the lights, I have good growth and colour in my corals.

I ran a 2080 over my 3ft 50g. It was almost perfect, so yes, two over a 6ft. would be good.

2 x 32" will give you 100% coverage but like I said it's not necessary unless you are going SPS wall to wall and more importantly, if budget allows.

I have 2x 24" custom led layout Evergrows and I love them. The only thing I don't like is that you cannot sync them and the timers wander