I vegged the current flower for 30 days under 2000w mh. My current veg is t-5s and they have been in there for about 7 weeks. They were about14-16 inches when I flipped the current flower and the current veg is about the same heigth now, but I have had to do a lot of pinching and bending tops to keep them that short. I use a scrog method and keep the canopy under the screen until I flip the switch and the screen is 14 inches from the medium. If you look back in my journal toward the beginning you can see when I put up the screen up and what they looked like then. Hope that helps. Feel free to ask if there is something else.