I agree with tomahawk, cfls seem to go up exponentially in price with higher wattage. I personally used mostly 23 watt and a couple of 46 watt throughout my grow (
https://www.rollitup.org/grow-journals/254132-diesel-ryder-cfl-grow.html ). One thing about cfls is that you want them as close as possible to the plant with out touching the plant (within 2-3 inches). This does become a pain when I had to start adjusting my lights everday, but my yield was better than most people who use cfls. Looking back on it, it would have been cheaper to go with a low wattage Hps. I thought I was saving money, but I must of spent $100 on sockets, y-adapaters, cfls, wood to mount the sockets, and string to hold them up. just my 2 cents.