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  1. Happyjoy

    What height HPS over 2x3 sq feet to get good coverage?

    hey everyone i have a quesiton which may sound simple, but i just wanted to make sure im understnading the research ive been doing correctly. as u can see from the qeustion, im a newb in growing, and a complete newb in hps im lighting a 2x3 foot room, with a 400w hps. (no cooltube, temps...