The 55 Line was designed with the design and build contractor in mind. The Philips Chloride 55 Lie Exit has a specification grade die cast housing that offers features for the design and build contractor. This dual voltage unit comes with universal mounting capability and concealed directional chevron indicators (knockouts). The 55 Line LED Exit offers higher visibility and excellent uniform letter illumination (diffused, no visible LEDS). The 55 Line Exit will dramatically reduce operating cost due to its low energy consumption and no maintenance requirements because of the long projected lamp life. UL listed to Standard 924: NFPA 101 (Life Safety Code), NEC and OSHA Standards and UL damp location listing available.