12x12ft Room To Grow In!!SUGGESTIONS!?

do what stinkbud does. its a hydro sticky. u could go longer with your aero/nft setup tho./ like diagonal!

DaGambler said:

...and his only real limitation after that would be high electrical consumption.

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And the heat factor. Why not invest a little more and get the 6" air-cooled reflector. If you're running 3-4 you are going to be dealing with some heat and this will cut down the heat pretty good.