Indicator light (Pilot lamp)
An indicator light is an electric light that indicates whether a device that consumes power and operates is energized, operated, or stopped. It is a display device that shows the surroundings that it is in a certain state by lighting up. The indicator light is also called a pilot lamp. Indicator lights are not just on, but the colors they display have meaning, and the meaning of colors is determined in the power receiving equipment of buildings, production equipment in factories, and machine tools.