The Emergency Light is a combination of an exit sign and four portable lights. Usually, it is installed in public hallways or entrances of apartments and functions as an ordinary exit sign. However, in an emergency situation with sudden blackout, people can pull out the edge of Emergency Light and it becomes three portable lights which can brighten up the escape routes ahead. Each portable light has a powerful battery and flash light which lasts for several hours, enough to secure time to escape from a building.