This emergency light fixture is designed to meet US Standard UL 924 Emergency Lighting and Exit Sign Regulations, with a housing made of high-impact resistant, flame retardant thermoplastic material that continues to operate during emergencies such as fire or earthquakes. The unit is UL-listed for safe operation and features a built-in Nickel cadmium backup battery that provides 90 minutes of emergency operation during power outages. With its flexible installation options and compatibility with both 120V and 277V circuits, this emergency light fixture is suitable for use in apartments, commercial buildings, industrial facilities, and more.