fyi get rid of those pure actinic's and change the out for a 22k bulbs (GE aqua blue plus, blue +, aqua science blue) and you can keep easier SPS. the output of a pure actinic is only half of most 22k bulbs.
i know i have said it before and i know you like the blue, it just won't be as purple but still blue
Your fixture can keep SPS
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