An exit sign is a device in a public facility (such as a building, airplane or boat) that displays where the emergency exit is.
Early exit signs were generally either made of metal and lit by a nearby incandescent light bulb or were a glass cover that fit directly over a single-bulb light fixture. The inherent flaws with these designs were that, in a fire, the power to the light often failed. In addition, the fixtures were small and dim, making them hard to spot in a fire where smoke often reduced visibility.
Modern Exit Signs use much less power. LED, fluorescent, and new incandescent signs only require 3-12 volts to be fully lit, depending on the sign.Battery backup systems are the standard way of complying with new building code requiring that exit signs be permanently lit.
The EXIT SIGNS are very important. That is why you have to know where they are ahead of time because you will never know when an emergency will occur. When we enter a building like the mall for example, we do not expect that something bad will happen. In addition, avoid the rush of people when there are emergency situations because stampede will likely to follow. You would want to avoid being part of that pack as much as possible.
It is the responsibility of the building owners to provide Exit Sign for everyone who is occupying and using the building. This is to ensure that everyone can get out of there in case of a tragedy.
The following are important in for the safety in a large building :
1. more than one exit in all levels of the building. At least two exits are necessary so that the people will have another option if the other becomes impassable. The exits should be in opposing directions so that the other exit will not be affected if the first exit catches fire.
2. should be visible. People should easily spot the signs.
3. exit sign must can direct the people to where the emergency door.
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