There are three main aspects of emergency escape lighting:
The above distinctions serve to emphasise the role of emergency escape lighting in fire safety and how it is adapted and applied, on a case by case basis, according to the specific use and occupancy levels of a particular building and / or areas within it.
In detail, as noted in the HM Government publication Fire safety risk assessment: offices and shops (p 100), an emergency escape lighting system should normally cover the following: