http://www.richsoil.com/CFL-fluorescent-light-bulbs.jsp
First off, CFL bulbs contain mercury. If you use them, and one wears out, you have to dispose of them at a recycling center that takes them. These recycling centers tend to be in cities. So if you live out in the country, you may have to drive some distance to dispose of your dead bulbs, wasting a lot of gas money in order to save pennies on your electric. If you put one in the trash, eventually it will break and the mercury will get into a landfill. If you drop one at home and break it, you're supposed to leave the house at once and leave all the windows open to let the mercury gas dissipate, and then clean it up and take it to a recycling center that takes mercury!
http://www.freedomisknowledge.com/ed/warningcompactfluorescentebulb.html This website describes just how poisonous CFL bulbs are. Scary!
If you have a room where you just turn the light on for a few minutes, like the bathroom or a closet, a CFL bulb is not the best choice. They use a lot of energy right when you turn them on. Also, turning them on and off all the time shortens their life quite a bit. A regular light bulb is the best bet here - or maybe an LED one, although those bulbs are so expensive still. And rather dim.
And, of course, there's this stupid law that is requiring regular light bulbs to be pulled off store shelves gradually. I urge you to complain to your congressman/woman about it.
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