How Often Should Emergency Lighting Be Tested In The UK?
The short answer: emergency lighting needs a brief functional test every month and a full-duration test once a year, in line with BS 5266-1. But there's more to it than just ticking boxes, the type of test, who carries it out, and how results are recorded all matter.
At Electrical Testing London, our engineers carry out emergency lighting testing across London and the South East for landlords, businesses, and property managers who need to stay compliant without the guesswork. This guide breaks down exactly what's required, when, and why it matters for your property.
What UK rules say about emergency lighting tests
Two main pieces of regulation govern emergency lighting testing in the UK. The first is BS 5266-1, the British Standard that sets out the technical requirements for how emergency lighting systems should be installed, maintained, and tested. The second is the Regulatory Reform (Fire Safety) Order 2005, which places a legal duty on the "responsible person" for a building to maintain fire safety measures in proper working order. Together, these form the foundation of what you're legally expected to do.
BS 5266-1: the technical standard
BS 5266-1 is the document that answers the question of how often should emergency lighting be tested in practical terms. It specifies that you must carry out a short functional test every month to check each luminaire activates correctly, and a full rated-duration test once a year to confirm the system can sustain power for the required period, typically one hour or three hours depending on the system type. These are minimum requirements, not optional recommendations.
Failing to follow BS 5266-1 can be used as evidence of non-compliance during a fire safety audit or enforcement inspection.
The Regulatory Reform (Fire Safety) Order 2005
The Fire Safety Order applies to virtually all non-domestic premises in England and Wales, including offices, shops, warehouses, HMOs, and communal areas of residential blocks. Under this Order, the responsible person, which could be you as the employer, building owner, or managing agent, must ensure that fire safety equipment, including emergency lighting, is maintained in efficient working order. Local fire authorities have the power to inspect premises and issue enforcement notices or prohibition orders where testing records are missing or inadequate.
How often to test emergency lighting
The rules on how often should emergency lighting be tested break down into two distinct testing intervals. BS 5266-1 sets out a mandatory schedule of monthly checks and an annual test, and both serve different purposes in confirming your system is ready when it counts.
Monthly functional test
Every month, you need to carry out a short functional test on each emergency luminaire. This involves simulating a power failure and confirming that every light activates correctly. The test should be long enough to verify activation but not so long that it fully discharges the battery, so typically around one to two minutes is sufficient for this check.
Never skip monthly tests on the assumption that the annual test covers everything. Both are required under BS 5266-1 and each serves a distinct purpose.
Annual full-duration test
Once a year, you must run a full rated-duration discharge test. This means allowing each luminaire to operate entirely on its battery for its full rated period, which is either one hour or three hours depending on your system classification. This test reveals battery degradation that a monthly check would not catch, and it confirms the system can sustain power long enough to support a safe evacuation.
How to carry out monthly and annual tests
Knowing how often should emergency lighting be tested is only part of the job. You also need to know how to run each test correctly so the results are meaningful and defensible if your premises face a fire safety inspection.
Running a monthly check
To carry out a monthly functional test, isolate the mains supply to each emergency luminaire using the dedicated test key or switch, and confirm every light activates. Hold the supply off for one to two minutes, then restore power and check that all luminaires return to their normal charging state. Record the date, time, and the result for each fitting.
If any luminaire fails to activate or does not return to charge, treat it as a fault requiring immediate investigation.
Running the annual full-duration test
For the annual test, you must disconnect the mains supply and allow each luminaire to run on battery power alone for its full rated duration, either one hour or three hours depending on your system classification. Check that every fitting remains illuminated throughout the entire period. Once mains power is restored, allow the full recharge period before recording the final result, as some batteries can take up to 24 hours to recover fully.
Who can test, and what records you must keep
Understanding how often should emergency lighting be tested is only useful if the right person carries out the work and documents it properly. UK regulations do not require a fully qualified electrician for monthly checks, but they do require someone competent enough to follow a defined procedure and identify faults.
Who is qualified to test
For monthly functional tests, a responsible person within your organisation can carry them out, provided they understand the test procedure and know how to spot a failing luminaire. The annual full-duration test, however, should be carried out by a qualified engineer with specific knowledge of emergency lighting systems, as the results need to be accurate and defensible under the Fire Safety Order.
Appointing an unqualified person to sign off an annual test can undermine your compliance position entirely if an inspection follows.
What records BS 5266-1 requires
Every test must be logged in a dedicated emergency lighting logbook, which should remain on the premises at all times. Your records need to include the date of each test, the duration, which luminaires were checked, any faults found, and the remedial action taken. Fire safety inspectors expect to see a complete, unbroken record going back at least three years.
Common faults and what to do after a failed test
Even with a regular schedule in place, faults appear. Knowing what to look for helps you act quickly rather than waiting until an inspection reveals a problem. Failed tests are not just a compliance issue, they indicate a real gap in your building's fire safety provision.
Most common faults found during testing
The faults that come up most often during monthly and annual emergency lighting tests include batteries that no longer hold charge, luminaires that fail to activate when mains power is cut, and indicator lamps showing a permanent fault state. Corroded contacts, failed drivers, and wiring faults are also typical findings, particularly in older installations that have not had consistent maintenance.
A luminaire that passes a one-minute monthly check can still fail a full-duration annual test if the battery is degrading.
Steps to take after a failed test
When a fitting fails, log the fault immediately in your emergency lighting logbook and arrange remedial work before the next test cycle. Do not simply replace the record with a pass entry once repairs are done without noting the original failure. Understanding how often should emergency lighting be tested is only effective if failed results are treated as actions, not inconveniences.
A quick recap
The question of how often should emergency lighting be tested has a clear answer under UK law: every month for a short functional check, and every year for a full-duration battery test. Both are required under BS 5266-1, and both serve a purpose that the other cannot replace. Monthly tests confirm activation. Annual tests confirm endurance.
Your records matter as much as the tests themselves. A logbook with unbroken entries protects you during fire safety inspections and demonstrates that you take your responsibilities seriously as the responsible person under the Fire Safety Order. Without documentation, a test may as well not have happened in the eyes of an enforcement officer.
Faults need action, not just a note. If a luminaire fails, arrange remedial work promptly and log everything. If you want qualified engineers to handle your testing and keep your property fully compliant, request an emergency lighting test quote from Electrical Testing London today.
