Emergi-Lite® SR series LED "SORTIE" exit sign with power pack series. The exit housing and the faceplate(s) shall be constructed of steel. The exit sign shall have a maximum depth of 2-1/2 in. The faceplate(s) shall come standard with knockout chevrons. The light source shall be light emitting diodes (LED). Red LED technology shall be ALINGAP. The LED lamps shall provide illumination in normal and emergency operation and shall be mounted inside the exit housing, not on the face. An LED-sensitive diffuser shall be mounted behind the legend to provide the 6 in high by 3/4 in stroke letters with even illumination. Pre-assembled for ease of installation Metal housing with baked enamel finish - will not yellow Easy access to wiring entry Exit Sign with long life, ALINGAP LED light source Energy efficient, consumes less than 3W in stand-by mode