Emergency lighting provides visibility in an emergency where the main power supply is cut and any normal illumination fails. Emergency lighting operates automatically to provide sufficient illumination to enable occupants to evacuate the premises safely.
Emergency lighting systems are required to be periodically tested and inspected to ensure that in the event of an evacuation due to a loss of mains power, the system can operate correctly.
BS EN 50172:2004 and BS 5266-8:2004 (emergency escape lighting systems) outline the minimum requirements for inspection and testing of emergency lighting systems.
Monthly purge tests should be carried out alongside a full annual inspection and test.
Duty holders have a legal obligation to ensure that their emergency lighting system has been installed and maintained in accordance with BS 5266-1:2016 (Code of Practice for the Emergency Lighting of Premises).