In case of Panic caused by Fire, Earthquake or any other hazards , the people in the promises usually does not focus, and can’t even remember the way out because they realizes that their time to escape too short, so they start taking action with less or no thinking.
In order to give a hand to the people under this situation inside the building helping them to find the way to escape , Exit signs and Emergency lights are used, referring to the exits and enables them to see their way and get out of the building peacefully.