I agree with the earlier posts that your plant looks stretched (doesn't have enough light), but it does look healthy... Just go to Home Depot and get the biggest CFL they have, my local HD has 42w cfls (200w equivalent), but I know some HDs have the 300w equivalent bulbs (I think they are 68 actual watts and run about $15 bucks). That one bulb will get you going, keep it about 2 inches away from the top with a fan blowing over it to gently take the heat away.
As for the color temperature, the "red" lights, ussually advertised as "soft white" are better for vegging (similar spectrum to Metal Halide bulbs) and the "blue" lights, often advertised as "daylight" are better for flowering (similar spectrum to High Pressure Sodium bulbs). If you are only going to buy one, I would suggest the "daylight" bulb.
Most importantly, you can't be expecting too much if you are just going to use a few CFLs for lighting (you'll be lucky to pull a half ounce of decent herb, but it will probably be "fluffy" and light compared to commercially grown weed). You are going to need to transplant your baby into a bigger pot before it gets rootbound, I would say a week from now at the latest.
Good luck with your endevor, I did my first grow using only the 26W cfls (100w equivalents). I had about 10 of them around my plant that was about 18" when I enduced flowering, and it grew to about 30" before it chopped her down.
Good luck with your first attempt big guy, if you need any help just let me know.