All I am saying is if you are running 8 radions now and you switch to 3 mitras it will seem dim. When I had it over my tank at 100% its has the same coverage as 2 ai sol units and that is it. If you have a lot of lps with some sps in the tank then ya three will probably suffice but if you are heavy into sps then just prepared for the extra cost in case you feel that coverage is less then optimal. I know I wasn't happy with the light coverage with only 6 ai units on the 300 and even with 9 it still didn't meet my expectations. Again different people different strokes, this is merely my opinion. You can always start with 3 and throw some radions back on if the coverage isn't great.
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