... 4v. 3,long life >60000hours 4,high efficiency,energy saving. energy saving led lamp e27The product is a kind of lamplight ... :1. Put the switch to the AC power and load the holder, now the holder switch is on ... is off.2. Push the switch to DC power and load the holder, with the emergency function, the ... the holder switch is on, the lighting is off and meantime it is in charge position, the indicator lights ...