... can still light up 6-7 hours. (the bulb auto working itself, when the electricity is cut)With a built-in handhelder, also,it ... lampUse in Home, hotel, conference, office,etc.Instruction:1.When power is cut, automatically be converted to DC power supply, lamp ... Intelligent control protection circuit,safe and reliable. (the bulb auto working itself, when the electricity is cut)also,it can be use as a ...