Do CFLs contain mercury?
Here are a few facts to keep in mind about compact fluorescent lightbulbs (CFL’s) and mercury: 1) The single largest source of mercury emissions are power plants, so switching to CFL’s, which contain a small amount of mercury, will lower mercury released to the environment through reduced electric demand, especially if that electricity is generated through coal-fired power plants. 2) A CFL only has about 5 miligrams of mercury – about 5 times less than a small battery (like a watch battery). 3) Many recycling programs will recycle CFLs, and 10 years from now when they burn out even more programs will take them. For more information, take a look at this U.S. Environmental Protection Agency-based fact sheet (PDF) or a recent answer to the mercury/CFL question by Grist’s “Ask Umbra.
CFLs contain a very small amount of mercury sealed within the glass tubing – an average of 4 milligrams – about the amount that would cover the tip of a ballpoint pen. By comparison, older thermometers contain about 500 milligrams of mercury – an amount equal to the mercury in 125 CFLs. Mercury is an essential part of CFLs; it allows the bulb to be an efficient light source. No mercury is released when the bulbs are intact (not broken) or in use. Most makers of light bulbs have reduced mercury in their fluorescent lighting products. Thanks to technology advances and a commitment from members of the National Electrical Manufacturers Association, the average mercury content in CFLs has dropped at least 20 percent in the past year. Some manufacturers have even made further reductions, dropping mercury content to 1.4 – 2.5 milligrams per light bulb. Because CFLs contain mercury, they should be disposed of properly. Follow proper clean-up recommendations if a CFL breaks in your home.
Here are a few facts to keep in mind about compact fluorescent lightbulbs (CFL’s) and mercury: 1) The single largest source of mercury emissions are power plants, so switching to CFL’s, which contain a small amount of mercury, will lower mercury released to the environment through reduced electric demand, especially if that electricity is generated through coal-fired power plants. 2) A CFL only has about 5 miligrams of mercury – about 5 times less than a small battery (like a watch battery). 3) Many recycling programs will recycle CFLs, and 10 years from now when they burn out even more programs will take them. For more information, take a look at this U.S.
