The EXP-EMG-EXT-12W-1LX Explosion-proof Emergency Exit Sign (photo) is designed to provide failsafe operation and a pathway to safety in the event of unexpected power failures. The sign is approved for use in Class 1, Div. 1 and Class 2, Div. 1 and 2 areas, and complies with all hazardous location regulations for emergency explosion-proof lighting. It will run for 90 min when the main power sources are shut down unexpectedly. The unit features an LED-powered exit sign and a high-performance nickel-cadmium battery. — Larson Electronics LLC, Kemp, Tex.