I don't know your answer, but definitely an interesting find.
From my personal experience, I prefer that the moonlight shine down into the water. You need the distance to get adequate dispersion of the light to see the fish. I have an Ario in my 55g Cichlid tank that, in a good moment, I *might* see a fish swim near to. Otherwise, it's a blue light in the water...
In you circumstance, I believe that this would work for you...maybe with enough LEDs like this one, you will have a good lighting sequence!
75g FW Planted Community; 55g African Cichlid
29g Biocube SW Reef;12g AP Mantis Shrimp/Brittle Star
2 Cats, 2 Dogs, 5 Turtles