The RUN BISON LED Emergency Light is is the perfect solution for those on the lookout for a compact, energy-saving emergency light. The 2-head LED emergency light is used the High quality LEDs and battery back up make this unit virtually maintenance free. So the LED emergency lights are more efficient, you won ft. t be needing to change out the batteries in them as often either. Never replace the bulbs during the entire lifespan of the unit.With a universal back plate for quick hook-up, dual primary 120 or 277-VAC operation, and UL Listing for damp locations. The Emergency lights are connected to electrical grid, the grid powers a battery inside the light and keeping it charged at all times. Once a power issue occurs in the building, the emergency lights will activate. Color: White. Material: Acrylonitrile Butadiene Styrene (ABS).