Emergi-Lite® ESC-Series Combination of unit equipment and pictogram exit sign. The unit shall be made of solid steel sheet metal and be suitable for universal mounting: wall, end or ceiling. The legend housing shall have a maximum depth of 2-1/8 inch. The legend face plates shall be constructed of robust clear polycarbonate panels with an opaque border coloured factory-white. Each face plate shall come standard with two legend films for pictogram and direction selection. The light source shall be white light-emitting diodes (LED) and shall provide even illumination in normal and emergency operation. The power pack shall include one circuit board with test switch and pilot light for battery charger and legend LED driver. The unit shall include one 6 V, maintenance-free, sealed lead-calcium battery and shall provide minimum 30 minutes of emergency lighting upon AC power failure. The emergency heads shall require no tools to adjust and aim.