I know buying CFL bulbs is the new eco-conscious thing to do because they use less energy. One thing to consider is that when throwing these bulbs away is that they need to be disposed of properly. I'm sure not many people know that these bubs contain trace amounts of mercury...yes they stuff we have been trying to remove from water sources for years...think tuna. When disposing of these bulbs they shouldn't be thrown away in the regular trash. The mercury levels can leach into landfills if you throw them in the trash. You can find a recycling program in your area by visiting epa.gov/bulbrecycling.
I'll get off my soap box now. I just wanted all to be aware of this, as it seems to be a dirty little secret.