Most people know that a pop and flash before a standard light bulb goes dark means it has burned out. But you might not be familiar with the slightly more dramatic burnout of a compact fluorescent light bulb (CFL).
CFLs operate differently from incandescent bulbs, using about 75 percent less energy. They also burn out differently.
As a CFL approaches the end of its life, expect the light to dim. When it does burn out, you’ll likely hear a more dramatic pop than with a traditional bulb, and you could smell a distinct odor. The bulb might even produce smoke, while the base of the bulb might turn black. None of these things should cause concern. In fact, popping and smoke means the bulb’s end-of-life mechanism worked correctly.
To ensure you’re using CFLs safely, take two precautions. Before you buy, check the packaging for the mark of an independent safety testing laboratory, such as Underwriters Laboratories. That label means the bulbs have been tested repeatedly for safety hazards. After the bulb has burned out, don’t toss it in the trash. Instead, take old bulbs to your local department store or other retailers that accept the bulbs for recycling.