LED safety light 1.5h IP42 (GRL-21). These types of lights are used in areas where safety lighting is necessary. Each light must be permanently connected to the power supply voltage. During normal operation, the power and charge indicator LEDs light up, indicating the batteries are charging. In the event of a power supply interruption, the power and charge indicators turn off and the light automatically switches to backup mode, turning on the lamps. When the power supply voltage is restored, it returns to normal operation.