One thing I would add is a separate channel for a few (3 x 3w blue leds) moonlights to view the tank at night. If you're customizing, then for the front row of LEDs, I would use 90 degrees lenses so there's less light hitting your front panel and growing algae & more light directed downwards towards your sandbed. 120 degree lenses could be used over the other emitters for better spread, but the more light hitting your front panel, the more frequently you'll have to clean the glass.
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