Video narration
Does every bulb make light by getting hot? An old incandescent bulb heats a wire until it glows. An LED works differently: electrical current enters a semiconductor p-n junction, where two sides meet. There, electrons fill empty spaces called holes and release energy as light. The material sets the color. LEDs produce less heat, though not zero. So the answer is no: an LED shines by releasing energy in a semiconductor, not by heating a wire.