Emergency lighting requirements (BS 5266)
Most commercial and multi-occupancy buildings need emergency lighting — lighting that switches on automatically if the mains power fails, so people can see to escape safely. BS 5266 is the UK standard for it. What you need is driven by your fire risk assessment, and the system is tested briefly each month and with a full discharge test once a year.
What emergency lighting is for
Emergency lighting illuminates escape routes and exits when the normal supply fails — for example in a power cut or a fire. It runs from batteries (built into the fittings or a central system) so it keeps working when the mains is gone. Exit signs and 'escape route' luminaires are the parts most people recognise.
Where it applies
Most commercial premises, shared areas of multi-occupancy buildings, and many HMOs need it. As with fire detection, the specific requirement comes from the fire risk assessment, which identifies the escape routes and the areas that must stay lit.
Testing and maintenance
BS 5266 expects a short monthly function test (a brief check that each fitting works on battery) and a full annual test, where the system runs on battery for its rated duration — usually three hours — to prove it would last a real evacuation. The results are recorded in a log book.
Does my premises legally need emergency lighting?
Most commercial and multi-occupancy buildings do, but it's the fire risk assessment that confirms what's required for your specific premises. We install and maintain to whatever the assessment specifies.
How often does emergency lighting need testing?
A brief function test monthly and a full duration test (typically three hours) annually, with results recorded. Maintenance contracts usually cover both.
Can emergency lighting be added to existing fittings?
Often yes — emergency versions of standard fittings, or dedicated emergency luminaires and exit signs, can be added to most premises without a full relight.