Topaz's Self-Testing Emergency Lights feature a high impact, flame retardant thermoplastic housing, lamp heads that track and swivel for full range adjustability, and battery backup for 90 minutes of illumination in the event of a power outage, to meet all required NFPA, UL, NEC and OSHA standards. In addition, this self-testing, self-diagnostic model verifies battery connection and charge board, performs monthly self-checks, and red and green indicator lights illuminate to identify five potential faults, so safety is never compromised. At Topaz, we know you place a high priority on the safety of the offices, warehouses, retail, and public spaces that you build.