I would also like to know this.I have a 55 gallon tank with 2 60w set to setting 4 but tweaked it way down to 2%/1%/1% for daytime. They are extremely bright and without a par meter I’m afraid to fry my tank. No reefs yet. But I have 6 fish and they all seem to love it. Also have a sand sifting sea star and I can’t tell how she feels about it yet.Does anyone have the 60 watt one? Trying to figure out what a good setting for A,B,C. under the settings i would be under the mixed category for different kinds of montipora, Zoa's.
Not sure what I would have to set it to in order to keep any reefs or anemone. Some help would be nice.