An Emergency lighting discharge test is carried out to verify that the emergency lighting duration within a building complies with current standards.
Emergency lighting should operate for a minimum of 3 hours, this is dependent upon the premises use and planning conditions. This enables the safe evacuation of persons within a building in a power failure condition.
The batteries that provide the standby lighting are generally incorporated into the light fittings. Within larger buildings, it isn’t uncommon to have a central battery bank to operate the emergency lighting in the event of the building losing power.