I have used used black boxes, one didn’t run good par. 180 at a depth of 12-14” below the light (8-10 inches below water). They were old (4-5 years old). So that was an issue.
My next set of black boxes are running better. Not dialed up all the way and I have 350 par where I want.
I ran a 8 bulb t5 at my school tank and loved it! Color was fantastic colors were thriving and some actually bleached because of the power!
I would recommend used t5 over black boxes.
I like the controllability of the black boxes but am leaning towards a used t5 or ReefBreeders for my next light.
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