How Often Should Emergency Lighting Be Tested? The Complete Guide for UK Businesses
If you manage or operate a commercial premises in the UK, emergency lighting is not optional - and neither is testing it. Under BS 5266-1:2016, the British Standard governing emergency lighting, all commercial premises are required to carry out regular testing of their emergency lighting systems and maintain a written log of those tests. Failure to do so is not just a compliance issue - it is a liability risk and, in the event of an incident, potentially a criminal one.
This guide explains the full emergency lighting testing schedule, what each test involves, who is responsible for carrying it out, and what the consequences of non-compliance look like in practice. If you operate a business across Surrey or West Sussex and need your emergency lighting tested and certified, MS Electrical Solutions can help.
What is Emergency Lighting and Why Does it Need Testing?
Emergency lighting is any lighting system designed to operate automatically when the main power supply fails. Its purpose is to ensure that occupants of a building can safely evacuate in the event of a power cut, fire or other emergency - providing sufficient illumination along escape routes, at exit doors, in stairwells and at fire-fighting equipment points.
Unlike standard lighting, emergency lighting units contain their own battery backup, which charges continuously from the mains supply and activates automatically when power is lost. Over time, these batteries degrade. Lamps fail. Charging circuits develop faults. Without regular testing, a system that appears operational may fail entirely when it is needed most.
This is why the testing schedule exists - and why it is a legal requirement, not a recommendation.
The Emergency Lighting Testing Schedule Under BS 5266
BS 5266-1 specifies three levels of testing, each at a different frequency. All three are required - they are not alternatives to each other.
Monthly test - function test
The monthly function test is a short duration test - typically a quarter of the system's rated duration, so around 15 minutes for a one-hour rated system. The purpose is to confirm that each emergency luminaire activates correctly when the mains supply is interrupted and that no lamps have failed since the last test.
During a monthly test:
The mains supply to the emergency lighting circuit is interrupted
All emergency luminaires are visually checked to confirm they have activated
Any failed lamps or units that do not activate are recorded and replaced
The mains supply is restored and units are allowed to recharge fully
The test and its outcome are logged in the emergency lighting logbook
The monthly test can be carried out by a competent person within the business, it does not require a qualified electrician, provided the person understands the system and records the test correctly. However, many businesses choose to include monthly testing in a planned maintenance contract with their electrical contractor to ensure it is never overlooked.
Six-monthly test
A six-monthly test follows the same principle as the monthly function test but is carried out separately, at the six-month point in the year. Some premises carry out this test in addition to their monthly tests as part of a structured maintenance programme. The six-monthly test should be recorded separately in the logbook.
It is worth noting that the annual test - described below - does not replace the six-monthly test. Both are required under BS 5266.
Annual test - full duration test
The annual full duration test is the most rigorous and the one most commonly missed or deferred by businesses. It requires the emergency lighting system to run on battery power for its full rated duration - either one hour or three hours depending on the system category without interruption.
For a three-hour rated system, this means the batteries must sustain full operation for three continuous hours. At the end of the test, all luminaires are checked, any failures recorded, and the system is allowed to recharge fully which can take up to 24 hours. During the recharge period, the premises should be considered as having reduced emergency lighting provision.
The annual test should always be carried out by or under the supervision of a competent electrician. The results must be formally documented and a certificate issued. This is the document that building inspectors, insurers and local authorities will request as evidence of compliance.
Who is Responsible for Emergency Lighting Testing?
The legal responsibility for emergency lighting testing sits with the "responsible person" typically the building owner, employer or facilities manager, depending on the type of premises. Under the Regulatory Reform (Fire Safety) Order 2005, the responsible person has a duty to ensure that fire safety systems, including emergency lighting, are maintained and tested at the intervals specified by the relevant British Standard.
In practice, this means:
The responsible person must ensure tests are carried out at the correct frequency
Tests must be logged in an emergency lighting logbook - this is a legal requirement
The logbook must be available for inspection by the fire authority or building inspector on request
Any failures identified during testing must be rectified promptly and the remedial work recorded
Annual full duration test certificates must be retained as evidence of compliance
While the responsible person does not need to be an electrician, the annual test should involve a competent engineer. For most businesses, the most practical approach is to appoint an accredited electrical contractor to carry out the annual test, produce the certificate and advise on any remedial work required. Monthly and six-monthly tests can then be assigned internally, with the contractor reviewing the logbook at each annual visit.
Which Premises Require Emergency Lighting in the UK?
Emergency lighting is required in all non-domestic premises where people could be at risk in the event of a power failure. This includes, but is not limited to:
Offices and business premises
Retail units and shopping centres
Restaurants, cafes, bars and hospitality venues
Hotels and accommodation
Schools, colleges and educational buildings
Healthcare premises and GP surgeries
Industrial units, warehouses and manufacturing premises
Multi-occupancy residential buildings - HMOs, blocks of flats and apartments
Public buildings - leisure centres, libraries, community halls
Car parks and underground spaces
If you are unsure whether your premises require emergency lighting, the safest approach is to consult a qualified electrician. The cost of installing and testing an emergency lighting system is significantly lower than the potential consequences of non-compliance particularly in the event of a fire or evacuation incident.
What Happens if Emergency Lighting Testing Reveals a Failure?
Any luminaire that fails to activate during a monthly or annual test, or any battery that cannot sustain the required duration, must be remedied promptly. The failure must be logged in the emergency lighting logbook, including the date, the nature of the failure and the action taken.
Common reasons for failure include:
Battery degradation - batteries have a finite lifespan, typically 3-5 years for sealed lead-acid types
Lamp failure - the LED or fluorescent lamp within the unit has reached the end of its life
Charging circuit failure - the unit is not recharging correctly from the mains supply
Wiring or connection faults - particularly in older installations
Physical damage to the unit
In most cases, failed units can be replaced or repaired. Where a significant proportion of a system is failing, it may be more cost-effective to replace the system rather than repair individual units. A competent electrician can advise on the most practical approach and provide a clear quote for the remedial work.
What Are the Consequences of Non-Compliance?
Failing to maintain and test emergency lighting is a breach of the Regulatory Reform (Fire Safety) Order 2005. The consequences range from prohibition notices requiring immediate remedial action to prosecution in serious cases. Specific risks include:
Enforcement action from the local fire authority following a fire safety inspection
Prohibition notices preventing use of the premises until deficiencies are remedied
Fines and, in the most serious cases, criminal prosecution for the responsible person
Insurance complications - many commercial insurance policies require evidence of compliance with fire safety legislation. A lack of testing records can invalidate a claim.
Increased liability in the event of an incident where emergency lighting failure contributed to injury or harm
The logbook is critical in this context. Even if testing has been carried out, without written records a business cannot demonstrate compliance. Courts and insurers will look for documented evidence, not assurances.
Emergency Lighting Testing in Surrey and West Sussex
MS Electrical Solutions carries out emergency lighting installation, testing and certification for commercial premises across Surrey and West Sussex, including Crawley, Horley, Reigate, Redhill, Banstead, Epsom and Leatherhead.
We provide:
Annual full duration emergency lighting tests with written certification
Monthly and six-monthly testing as part of a planned maintenance contract
Emergency lighting installation for new or refurbished commercial premises
Replacement of failed or degraded emergency lighting units
Emergency lighting design and specification for building fit-outs
Testing and certification to BS 5266-1:2016
All work is carried out by NAPIT-accredited engineers and full documentation is provided on completion. We work with business owners, facilities managers and commercial landlords across the region.
If your premises are overdue for an emergency lighting test, or if you are unsure whether your current system meets the requirements of BS 5266, call MS Electrical Solutions on 07508 224603 or contact us online. We will give you a straight answer and a clear quote.
Emergency Lighting Testing - Frequently Asked Questions
Do I need a qualified electrician to test emergency lighting?
Monthly function tests can be carried out by a competent person within the business, provided they understand the system and record the results correctly. The annual full duration test should always be carried out by or under the supervision of a qualified electrician who can issue a formal certificate. MS Electrical Solutions carries out annual tests and certification across Surrey. Call 07508 224603.
What is a full duration test and how long does it take?
A full duration test requires the emergency lighting system to operate on battery power for its complete rated duration - either one hour or three hours depending on the system category. For a three-hour rated system, the test takes three hours. During this time the premises should be treated as having reduced emergency lighting provision. The system then requires up to 24 hours to recharge fully.
How often do emergency lighting batteries need replacing?
Most sealed lead-acid emergency lighting batteries have a service life of three to five years, depending on usage, charging cycles and environmental conditions. Nickel-cadmium batteries may last longer. Battery condition should be assessed as part of the annual test - if a battery cannot sustain the full rated duration, it should be replaced. MS Electrical Solutions can advise on battery replacement as part of any annual test we carry out.
What happens if my emergency lighting fails an annual test?
Any failures must be recorded in the emergency lighting logbook and remedied promptly. Depending on the nature and extent of the failure, this may involve replacing individual lamps, batteries or complete units. Where a significant number of units have failed, a full system replacement may be the most cost-effective solution. We provide a clear quote for any remedial work required following an annual test.
Can you install emergency lighting as well as test it?
Yes. MS Electrical Solutions installs, tests and certifies emergency lighting systems to BS 5266 for commercial premises across Surrey and West Sussex. Whether you need a new installation, an upgrade to an existing system or routine testing and certification, call 07508 224603 or contact us online.
Do residential properties need emergency lighting?
Standard domestic properties do not require emergency lighting under BS 5266. However, HMOs (Houses in Multiple Occupation), blocks of flats and other multi-occupancy residential buildings do require emergency lighting in common areas - corridors, stairwells and exit routes. If you manage an HMO or residential block in Surrey, contact us to discuss your requirements.
Book an Emergency Lighting Test in Surrey
If your commercial premises are overdue for an emergency lighting test or if you have never had one carried out - MS Electrical Solutions can help. We carry out annual full duration tests, produce formal certification and advise on any remedial work required, for businesses across Surrey and West Sussex.
Call 07508 224603 or use our contact form to discuss further with our commercial electrician in Surrey. We will confirm availability and provide a clear, upfront quote.
