i have a 48" sattelite with 2 moonlights if you have the actinics and the daylights on the moonlights are pretty much a moot point you can only use them when the others are off and its dark in the room i like to cut off the lights in the room with the moonlights on and just watch the tank with a drink and just relax no tv no noise just the moonlights and the sound of the water moving.