What's the Difference Between LED and Incandescent? Light-emitting diode (LED) and incandescent mild bulbs produce mild using different applied sciences. A conventional incandescent bulb produces light by passing electricity by a tungsten filament surrounded by inert gases to heat the filament to roughly 4,000 levels Fahrenheit. An LED consists of two adjoined pieces of semiconductor materials. Energizing an LED causes motion of electrons across the diode, which emits photons or gentle. Incandescent bulbs are cheap and produce good gentle, however they don’t last long. The excessive temperatures passing by means of the filament trigger it to interrupt down over time. As well as, they're inefficient