The Ready-Lite CX2000 Series LED Exit Signs operate with universal two-wire AC input voltage and universal two-wire DC input voltage. The faceplate(s) and the back plate snap together and are made of Die-Cast aluminum. The light source is light emitting diodes, that provide illumination in normal and emergency operation and are mounted inside the exit on a plastic frame/reflector. An LED-sensitive diffuser is mounted behind the legend to provide the 6" high by 3/4" stroke letters with even illumination. The Self-powered model stays illuminated during emergency operation for at least 90 minutes (red) and at least 60 minutes (green) upon AC failure. The Self-powered model includes self-testing and self-diagnostic functions.