Incandescent lighting is a type of electric light that produces illumination by heating a metal filament, usually made of tungsten, until it glows. This process occurs within a glass bulb that is often filled with an inert gas to prevent the filament from burning out quickly. Incandescent bulbs are known for their warm light and ability to render colors accurately. Despite their popularity, incandescent bulbs are less energy-efficient compared to other lighting options, such as LED or CFL bulbs. They convert only about 10% of the energy they consume into visible light, with the rest lost as heat. As a result, many countries are phasing out incandescent lighting in favor of more energy-efficient alternatives.