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 produce good buds. A short bushy plant is what you want to see because cfl's can't provide enough light for a plant that is over 2 feet tall. A lot of people use the 18/6 for veg but if u want to see better results go with 24. You can switch to 12/12 just 16 days after germination and have a crop in 68 days. Good luck and smoke the bud!I'd go with 18/6 and only use 6500K for veg like frmfboi said