I have a light fixture that made to use 6 bulbs, but I'm trying to cut down on energy cost by using only 3 of the 6 bulbs. The fixture has 2 switches, but I only use one. What I would like to know is what 3, 54 bulb lights would be recommended? I really don't like the aquarium to be to dark, which the blue seems to do, but I still would like to stimulate coral and plant growth, so I don't want the aquarium to be too dark, or too light. I hope someone could suggest a happy medium for me. Thank you. Ps. I forgot to add that my tank is a 75 gallon, and I would have to use soft corals that don't require a lot of light.