If you are talking about cloning. I guess that would work the cuttings dont do very much photosynthesis at that time. But you're you to get very leggy plants if your vegging them in a window. (is that what you mean)

and CFL's are not the best lighting for vegg. MH are but they cost a lot

my theory is: the more variables you can measure and control the better.
harris7 Reviewed by harris7 on . Is it really important to use CFL's? Hello People, friends, fellow pot dudes, ok....i have been having a discussion with someone who is experienced with growing. He was saying that when i have a clone set up....i can leave the plants on the window sill and wait till the closet is ready for them (cycles). He said that the light shud be fine. (Im from the united kingdom-so the lighting isnt as good as u guys in the states) I have disputed the fact that it will strecth and not be a thick/sturdy as if compared to using Cfl's. He Rating: 5