Wattage Lumen

RobNYC

Member
After reading every book i can get a hold of, and watching High Times ready set grow. I still don't know how strong of a light ill need for my grow. I'm growing outdoors right now, but I want to grow 12 plants in a a roughly 6 by 6 area indoors. is there a rule of thumb for the amount of wattage or lumen my plants require? In trying to save on electricity.
 
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