1. What is an indicator lamp?
A device, that monitors the working or position status of circuits and electrical equipment by lamp. Indicator lamp is usually used to reflect the working state of the circuit (electric or non-electric), the working state of the electrical equipment (operation, shutdown or test) and the position state (closed or disconnected), etc.
2. What color is the indicator lamp?
Indicator lamp used commonly colors are red, green, yellow, blue, white. Yellow means standby, green means normal operation, red means emergency stop.