Depends on how large your plants are going to be. If you are vegging for no longer than 6 weeks then 2 - 600's would be best. If you are vegging tree style then the extra penatration you get from the 1000 would be beneficial. Let us know how things go and good luck!

TGT
Tom Green Thumb Reviewed by Tom Green Thumb on . 600w or 1000w - whats better I'm realizing how important lighting is to growth and/or potency So, I'm getting ideas but can't seem to make up my mind 2 600's or 1000 watts. Rating: 5