These devices are used indoors (ta 50oC) in places where emergency luminaires are needed. The luminaire GR-270/SC is suitable for corridors lighting and the GR-271/SC for open area lighting. Each device must be permanently connected to mains power supply. In normal operation the capacitor is charging. In case of a mains power supply failure the device will light the illumination led automatically in emergency mode. When the mains power supply is restored the device turns to normal operation.