High impact polycarbonate Combination Emergency Light / Exit Sign utilizes the most energy efficient LED technology. The emergency lamps are lit by two high intensity tungsten lamps. Includes an automatically rechargeable Lead Calcium battery suitable for use in Damp Locations. This exit sign includes built in surge protection for spikes in voltage caused by lightening and static build up on components. This universal SINGLE or DOUBLE sided sign can be mounted on a ceiling or back wall. Includes universal directional arrow snap-outs and a mounting canopy. UL Listed.