A pilot lamp is an electric lamp that indicates the operating status of electrical equipment. Also called confirmation indicator light. Lights up when voltage is applied to the electrical circuit. When installed on the switch frame, the operating status of electrical equipment and the position of the switch in dark places can be checked at a glance. Products are classified into simultaneous lighting that lights when the switch is on, constant lighting that always lights even when the switch is off, and asynchronous lighting that lights only in the off state. The light source is an LED or neon sphere, and the illumination color is basically a single color such as red, green, yellow, milky white, etc., but there are also multi-colored light emission types that allows multiple forms of information to be transmitted to a worker with one pilot lamp, and you can choose the luminance and size. Shapes include a waterproof mold frame type that is resistant to high and low operating temperatures, and a single-action neon bracket type.