If you use ENOUGH cfl's than you can get a few oz every two months. By the time you do this, you could have just grown under that 400 for the same time and got twice as much. Used the cfl's to clone and veg, and had another crop in 60 days after you pick your first crop. All your choice though...
Forwhat420 Reviewed by Forwhat420 on . College Newbie... First Grow. I have a bunch of CFL's and a 400 metal halide lamp but only a very small space (big enough for 3-4 mature plants at most). I am also wondering about the energy consumption of the MH lamp, I'm not really looking for a spike in the electric bill. So here are my 2 questions. Will a MH lamp be too hot for a space in one of those behind the stairs closets? And, Will a MH lamp use much more energy then the CFL's? Rating: 5