We have a 37 gallon tank and have 130 watts of light using CF they are 50/50 bulbs 10K, actinic, the tank has been set up for about a month. We have about 60 lbs of live rock and 40 lbs of live sand, 4 dams, clarky, coral beauty, royal gramma, green serpent, fire shrimp and a scooter blenny...