That tank only needs a couple of good lights based on our past experience. Of course it depends what you are putting in it. But for a mixed reef, two LEDs like a couple of AI hydra 26 or 32s would work. Or a couple of radions. Or a couple of kessils.
Red Sea also makes their own line of lights, the ReefLED50 (50 watt) and ReefLED90 (90 watt). According to Red Sea's MyReefer Wizard, they recommend two of the ReefLED90s.