What to do when a compact fluorescent lightbulb (CFL) breaks or burns out
Compact fluorescent lightbulbs (CFLs) contain small traces of mercury. Mercury is also commonly found in thermometers, thermostats, and button cell batteries.
A CFL that has burned out needs to be recycled to prevent the release of mercury into the environment. CFLs should not be discarded in the trash.
If a CFL breaks, care must be exercised in the clean-up process to minimize exposure to mercury.