An LED bulb is a type of light source that uses light-emitting diodes to produce illumination. Unlike traditional incandescent bulbs, which generate light by heating a filament, LED bulbs are more energy-efficient and have a longer lifespan. They consume less electricity and can last up to 25,000 hours or more, making them a popular choice for both residential and commercial lighting. LED bulbs are available in various shapes, sizes, and color temperatures, allowing users to select the right lighting for their needs. They are also environmentally friendly, as they do not contain harmful substances like mercury, which is found in some other types of bulbs.