Compact fluorescent light bulbs contain mercury, a dangerous neurotoxin. The amount of mercury is large enough that the U.S. Environmental Protection Agency has published instructions on how to safely clean up a broken CFL bulb.
Russell Longcore writes at BestArticle.com:
If you break a CFL bulb, you’ll likely find that the proper cleanup could be very costly. And you’ll likely find that there is NO COVERAGE in your property insurance policy. Most policies have environmental cleanup exclusions. Even if your home is damaged by a tornado, hurricane or fire, the broken bulbs could cause you to incur thousands of dollars in environmental cleanup costs that your insurance policy will EXCLUDE.
If you have to clean up after even one broken CFL bulb, the cleanup costs will probably exceed a lifetime of the promised energy savings from using these dangerous contraptions.