Fluorescent light is a type of artificial lighting that uses a gas-filled tube to produce light. When electricity passes through the gas, it emits ultraviolet (UV) light, which then excites a phosphor coating on the inside of the tube, causing it to glow. This process is more energy-efficient than traditional incandescent bulbs, making fluorescent lights a popular choice for homes and businesses. These lights come in various shapes and sizes, including compact fluorescent lamps (CFLs) and long tubes commonly used in offices and schools. Fluorescent lights are known for their bright, white light and longer lifespan compared to incandescent bulbs, but they may contain small amounts of mercury, requiring careful disposal.