FORT MYERS, Fla. - Sales of compact fluorescent light bulbs, also known as CFL's have doubled in the last year. They're great energy savers, but do you know what to do with them when they burn out or break?

Consumer Reports says because these bulbs contain a small amount of mercury, you have to take extra care.

Consumer Report's Jim Nanni not only consults on testing of compact fluorescent lights at consumer reports, he also uses them in his own home.

"Used appropriately, CFLs are a great way to save money and energy. there are some important safety guidelines that consumers should follow in their use," says Nanni.

Recently he captured on camera a rare occurrence that has alarmed some CFL users, a bulb failing dramatically. "This bulb was flashing and making loud noises. from a distance or behind a shade it might appear like the bulb was on fire. But that wasn't the case. It was the bulb coming to the end of its life," Nanni explains.

Underwriters Laboratories investigates products, including CFL's for safety. UL listed CFL's are not a fire hazard, according to the organization. If your CFL has a dramatic end, Nanni explains what to do.

"Turn off the power to the bulb. Let it cool, and then remove it by grasping from the base and not the glass part of the bulb. Another concern consumers have is what to do with a broken CFL. They should follow the guidelines of the environmental protection agency because CFL's do contain mercury," Nanni said.

If a CFL breaks, open the windows and leave the room for at least 15 minutes. On hard floors, do not use a vacuum or broom to clean up the broken bulb. Instead, wear disposable rubber gloves and scoop up the pieces with stiff paper or cardboard. Wipe the area clean with damp paper towels.

Nanni continued to explain the how to clean up after a broken CFL. "To remove a broken c-f-l from a rug, use sticky tape to pick up the broken pieces and powder," said Nanni. Then, you should place all debris and cleaning materials in two sealed plastic bags.

Used compact fluorescents that are not broken should be recycled properly because of the mercury in them.

Check with your local sanitation company or click on the link in the related content section of this page. The link is just under the picture of the CFL.