HA HA.... Go big man.... Atleast 1 1000hps... I run 1 1000watt hps and 1 400MH and I dont even have 4'X8' and definately not 8' high more like 6'5".... Yes there will be cooling issues but i mean after your first room it will pay off the extra equipment it took to keep it cool.... For the extra dough It was so worth it to me.... Mine are nothing special but look at my room


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