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Compact Fluorescent Lightbulbs

Compact fluorescent light bulbs (CFLs) are likely somewhere in your home. These common bulbs save money on your energy bill, but they contain a small amount of mercury. If ingested or inhaled, mercury can be hazardous to your health. See IPC tips below for safe handling and disposal.

What is a compact fluorescent light bulb?

A CFL is an energy-saving light bulb that fits into a standard light socket. A CFL lasts up to 10 times longer and uses less energy than regular light bulbs.

What is mercury?

Mercury is a naturally occurring metal that exists as a liquid, solid and gas. It can be highly toxic if inhaled or ingested. Mercury can be found in:

  • Thermometers with a silver liquid (Thermometers with red or blue liquid do not contain mercury.)
  • Fluorescent light bulbs
  • Thermostats and barometers
  • Manual blood-pressure devices
  • Some gas meters, mostly those installed before 1961

How much mercury is contained in a CFL?

A CFL bulb has five milligrams of mercury, which is less than 0.0002 ounces. For comparison, a mercury thermometer contains about 100 times more mercury than a CFL. The mercury in a CFL can be an invisible vapor or a bead the size of the period at the end of this sentence. If CFLs are intact and used properly, the mercury is not released.

Why should I be concerned about mercury?

Inhaling mercury vapors is the main cause of mercury poisoning, as the mercury is absorbed by the lungs. Mercury poisoning can cause nausea, vomiting, diarrhea, weakness, headache, increased blood pressure, skin rashes, metallic taste and difficulty breathing.

Should I use incandescent bulbs that don’t contain mercury instead of CFLs in order to be safe?

The risk of exposure to mercury from the occasional broken CFL bulb is very small. Using CFLs greatly reduces the amount of mercury in the air by reducing the amount of electricity that power companies need to light a standard bulb.

How should I dispose of a CFL?

Do not put CFLs in your household trash since they contain mercury. CFLs should be sealed in a plastic bag and taken to a recycling site near you. To find a recycling center near you that accepts CFLs, visit

How should I clean up a broken CFL?

  • Open a window and leave the room (restrict access) for at least 15 minutes.
  • Remove all broken pieces and materials you can. Do not use a vacuum cleaner.
    • Do not use your bare hands to pick up pieces and materials. Wear disposable rubber gloves, if available.
    • Carefully scoop up the fragments and powder with stiff paper or cardboard.
    • Wipe the area clean with a damp paper towel or disposable wet wipe.
    • Sticky tape, such as duct tape, can be used to pick up small pieces and powder.
  • Place all pieces and materials in a plastic bag and seal it.
    • Some states permit you to put used or broken CFLs in the garbage. The bulb must be sealed in two plastic bags and put into the outside trash, if no other disposal or recycling options are available.
    • Wash your hands after disposing of the bag.
  • The first time you vacuum the area where the bulb broke, remove the vacuum bag after cleaning the area or empty and wipe the canister.
    • Put the bag and/or vacuum debris, as well as the cleaning materials, in two sealed plastic bags in the outdoor trash or protected outdoor location for normal disposal.
    • Simply being nearby when a CFL bulb breaks is not expected to cause any problems or symptoms. If you have questions, call the IPC at 1-800-222-1222.


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