sounds good. They say that by the veg stage you determine the size that your is going to be by the time its done flowering because it doubles in size from the time you switch to 12/12. So lets say at 3weeks your plant is about 1ft by harvest time it should be around 2ft. I really think thats a good size cause your using CFLs, because the light will be hard to penetrate to the bottom of the plants if they are to tall. I actually think that I'm going to have a problem myself cause I think I let my plants grow to tall but I'll have to wait and see.