When growing with cfl's it is best to keep the lights on 24 hours during the veg state. Then go straight to 12/12. I have seen this many times and it works great. Because cfl's don't put out a lot of light it is ideal to use side lighting so that the lower buds get the light they need to...
Not sure how old this post is but if your vegging for 8 weeks thats a long time, with cfl's you should only be vegging for about 16 days. You can have a crop in 68 days. Sex them about two weeks after you switch to 12 12. Your plants shouldn't get much taller then 2 feet because cfls don't...