An electric light bulb is a device that produces light when electricity passes through it. The most common type, the incandescent bulb, uses a thin wire called a filament that glows when heated by the electric current. Other types include LED bulbs, which are more energy-efficient and have a longer lifespan, and fluorescent bulbs, which use gas to produce light. Light bulbs are used in homes, offices, and public spaces to illuminate areas and enhance visibility. They come in various shapes, sizes, and brightness levels, allowing users to choose the right bulb for their needs. The invention of the light bulb is often attributed to Thomas Edison, who developed the first practical version in the late 19th century.