Look at the AI prime or the AI Hydra52. A little less money than the Radion but a little less control of the light. Most LED lights have a coverage area of 24" x 24" so I don't think 1 will be enough to cover your tank with any brand.
My ocean. 90g (yup, won it!), 40g, 28g, & 10g Systems PADI Advanced Open Water Tank Thread:
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