Best thing for a moon light I have ever found is an 8” (15-watt) black light. I saw this in action at a late night visit to a fellow reefers place and was very impressed.
Honestly, I find the LEDs provide too much of a spotlight effect, whereas the black light appears much more diffuse and natural over the tank.
I promptly went out and bought the above noted light at an automotive supply store (pricess auto) for about $9
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