@iiSNEEXx, that light is likely best for a 3x3, thats the advantage of these bar lights is that they evenly cover the entire 4x4.. so you can pack it in real tight. You could probably do a full tent like this - the ones on the sides of the tent just might not be getting optimum light. If you got $ to update light I'd recommend it. But getting a full grow under your belt with what you got also is a good idea. Good luck!
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