Exit sign seems to a simple thing that we usually find in most indoor public places such as offices, markets, hotels, hospitals and other places with big numbers of people are around. Most of these people even do not notice this sign. However, this ignorance will turn to be a special attention when emergency situation is all around. And, this sign will also mean nothing if it does not apply automatic light to support the work.
Government has noticed and instructed all business, commercial, service and other types of building that involves a lot of people within to apply these emergency lights on exit sign for safety. This is to avoid panic and chaotic during the power blackouts the places. We understand that in panic situation, injuries and damages could badly occur, even more when the eye sight is so limited or blinded at all. Learning from previous cases that once happened to several buildings with out well-prepared procedure by the time the power blackout strikes, people surely do not want to get another terrible trouble just by forgetting this little thing.
The whole procedure of installation and application of this emergency lighting is as a matter of fact just simple. Common people could easily do this. Nevertheless, contacting local service will seem to be a better idea. Besides they could work professionally, they also know much on where to best place the emergency lights and best locate precise position. It is best to employ them by the time of the building is under construction, so all related cablings and supporting components of the installation could be well managed and hidden as necessary, and the signs do not bulge too much when they are not in use. They are, somehow, supposed to play the most important role when needed as guidance to finding way out, or at least as a temporary shelter and the source of light when surrounding is dark while waiting for better situation.
Then, since government assigns the implementation of these emergency lights, most buildings have come up with stylish model of the sign. The more elegant and fancier the sign could be, the more prestigious the building would seem. Even more, we could find several emergency lights in only one place. They seem to have some other functions I believe; however, this will always be mainly functioned as it is supposed to be.