Seconding this. IIRC my tank (Nuvo 200) is the same height and depth as yours, just 72" vs 59". I have 4x G6 XR30s over it. Granted, it's probably slightly overkill because I'm doing a mixed reef, but wouldn't be if it was SPS dominant.
Also as a heads up - whatever light you choose, check out the recommended + maximum light spread. I ended up opting for G6 XR30s instead of G5 because G5 was 24" x 24" recommended, while G6 was 30"x 30" recommended.
Alternately, I'd suggest checking out ReeFi lights as well as Kessil (AP9x or a360x for mixed, A500x for SPS