One must be around 2800 lumen. You need minimum 4500 lm. for your space. With a good reflector and keeping it close to top you can go for vegging but if you use two you can have a bushy plant. Three is optimum to have a forest in there.
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Answers about CFL, HPS, How Much Light
tevfik Reviewed by tevfik on . Lighting advice i understand you need 6700klums for veg and 2700k for flowering, but i'm growing in a closet which height is 4ft and width is 1.5ft. I have one 42wcfl.. my question is would i need two 42wcfls for veg? or is one ok just because its such a small space? Rating: 5