i made two little "islands" for different zoas in the tank and i was going to place some leds over the tank. i was thinking possibly 6 leds, 3 for each island. a blue, white and royal blue for each of the islands. i was going to place 2 uv leds for "night lights" because my gf doesnt want a blue hugh in the room. i have noticed that with my other tank my zoas a doing great about 12" - 18" from the leds so i was going to place these leds about 15" above the tank.