Light automatically turns ON when power failure goes out. Emergency and Power Failure Lights with led or fluorescent lamp with lead acid battery, plastic housing, light for escalators, aisles, stairewells and corridors A power failure light is an automatic device that is intended to reduce the risk of injury during a power outage situation. A power failure light monitors the power flow and turns on automatically when the device detects a power outage situation. The device recharges automatically when the power is on and runs off the internal batteries when then power is off. The internal batteries in this device are usually, rechargeable sealed lead acid battery , which is capable of providing light for 4 hours, but varies by manufacturer of the Power Failure Light.
