An LED light bulb uses light-emitting diodes (LEDs) to produce light. They work by passing an electrical current through a semiconductor, causing the release of light and producing energy-efficient, long-lasting, and versatile lighting. Their energy efficiency makes them more environmentally friendly than alternatives, using significantly less energy while producing the same amount of light. The lifespan of an LED bulb is another reason why they’re so popular, typically lasting tens of thousands of hours, significantly more than alternative options.