just got me a secret jardin darkroom 120 its 4x4. now next is the lighting and venting any suggestions. will a 400 watt be sufficent? and as far as yield should i do 4 plants in there or would it be better to do one in a scrog? thanks for any help
400w can work in a 4x4 area all depends how much space your plants will cover, a 400w is generaly good for a 2x2 so if you run 4 plant, one per sq ft it's doable, but i would go with a 600w or even 1000w if you can keep the temp good.