I assume you have the lights on the RS brackets at 8 inches above surface water. You can run any of the 3 Red Sea programs (15k, 20k, or 23k)at full intensity and par will be just fine for your corals as long as lps and softies are at lower half of tank and sps upper half. I personally prefer 20k program as it’s a nice blend of whites and blues. Have the 90’s for years and never customized pre settings except for on/off time.