Electric light represents the conversion of electrical energy into visible electromagnetic radiation. Modern lighting technology encompasses several methods, including resistance heating, where an electric current passes through a conductive filament, causing it to incandesce; plasma discharge lamps that excite gases to emit light; and semiconductor devices that emit light when current passes through specific materials. The efficiency and lifespan of such sources have been dramatically improved through advancements in material science and solid-state physics, leading to highly efficient illumination systems used globally for both residential and industrial applications.