Compact fluorescent lamps (CFLs) are energy-efficient light bulbs that use a gas-filled tube to produce light. They consume less electricity than traditional incandescent bulbs, making them a popular choice for reducing energy costs and environmental impact. CFLs typically last longer, often up to 10,000 hours, compared to the 1,000 hours of incandescent bulbs. These bulbs come in various shapes and sizes, allowing them to fit into most light fixtures. While they provide a similar light quality to incandescent bulbs, CFLs may take a moment to reach their full brightness. Proper disposal is important, as they contain a small amount of mercury.