Bradyglo steel-framed exit signs are highly durable, easy to install, require no power source and are UL certified for LED lighting as an acceptable charging source. 50 ft viewing distance - an economical choice to meet minimum compliance. Compliant to NFPA Life Safety Code 101 and UL 924 Listed for use where LED, metal halide, mercury vapor or fluorescent lighting is present. Highly durable - constructed using a steel face plate with aluminium photo luminescent letters. Single sided with a wall mount configuration.