Compact fluorescent light bulbs (CFLs) reduce greenhouse gasses and can lower your energy bill. In fact, the Federal Energy Independence and Security Act's goal is to switch completely to energy-efficient light bulbs by 2014. But, because most CFLs contain mercury, which is considered toxic, hazardous waste, they cannot be thrown in the garbage like regular incandescent bulbs. Mercury poisoning has detrimental effects on a child's development, and is linked to sensory impairment. Be sure to check CFL labels for mercury levels and disposal requirements. The Doctors demonstrate the proper way to dispose of a CFL bulb, and reveal other light dangers.