Morris Products 73156 MR-16 Emergency Lighting Units, Remote Capable Style, White Two 5W 6 VDC MR16 halogen lamps 6 VDC maintenance-free lead battery provides 4 hours of emergency operating time using 2 lamps, 2 hours using 3 lamps, or 1.5 hours using 4 lamps Plastic enclosure suitable for indoor locations Can connect up to two additional lamps for greater illumination UL listed for quality assurance