Description (Features) Standard E26/E27 lamp base Bulb will intelligently switch to battery lighting when power is off It still can be switched on and off in the emergency mode. The built-in li-ion battery will last for 4+ hours! Battery lighting mode can be activated by fingers touch, it can be used as a torch light. Specifications: Model C413 Input Voltage 95-265V 50/60Hz Dimension 60*110mm Lighting Source