The All Pro Series is the most Economical LED combo for general-purpose applications. The durable, injection molded, thermoplastic material resists discoloration due to UV radiation and the energy efficient, low maintenance LED's provide bright illumination. All AP series combos offer universal configurations (single and double face) and have universal-mounting capability (ceiling, wall, end). The LED emergency heads are adjustable, can be side or top-mounted and will provide 17 ft of emergency egress coverage. The nickel cadmium battery requires no maintenance.