Normally lighting runs from the electric grid, but when the power goes off emergency lighting uses a battery as a backup power source. Also known as backup cells, the batteries can power an emergency light for at least four hours.
There are a few different types of emergency lights which are suitable for different applications, but two of the most common are maintained and non-maintained.
1. Maintained Emergency Lights
A maintained system works just like a standard light fitting would, however when the power goes off the light is still in operation.
2. Non-maintained Emergency Lights
These are not standard light fittings but instead when the power goes off in a building, non-maintained emergency lights switch on. It’s important to consider the position and number of units you require to meet emergency lighting installation regulations.