Thursday 20th August 2026
Choosing the right emergency lighting sounds like a one-afternoon job. It rarely is. There are decisions about system type, operating mode, siting, battery duration and an ongoing testing regime to keep on top of, and the consequences of choosing wrongly go well beyond a failed inspection.
If you manage a commercial premises, rent out property or hold legal responsibility for a building’s fire safety, this guide is for you. It works through every decision you need to make, in the order you need to make it. It links directly to our emergency lighting products so you can act on what you learn.
What Is Emergency Lighting? Definition, Purpose and Legal Duty
Emergency lighting is installed to illuminate escape routes and key safety points automatically whenever the mains supply fails. The moment normal lighting cuts out, an emergency lighting system kicks in from its own battery power, giving occupants enough light to find an exit and get out safely. Without it, a power failure caused by a fire cutting through a cable, an electrical fault or a grid outage could leave people in complete darkness.
It is worth being clear on one distinction. Emergency lighting covers escape route provision and safety during evacuation. Standby lighting, which keeps normal activities running during a power outage, is a separate category entirely. This guide focuses on emergency escape lighting, because that is what the law requires.
The Legal Framework: RRFSO 2005, BS 5266 and Building Regulations
Under the Regulatory Reform (Fire Safety) Order 2005 (which applies in England and Wales), the responsible person for any non-domestic premises has a legal duty to provide and maintain adequate emergency escape lighting. Equivalent duties apply under the Fire (Scotland) Act 2005 and the Fire Safety (Scotland) Regulations 2006 in Scotland, and under the Fire and Rescue Services (Northern Ireland) Order 2006 and the Fire Safety Regulations (Northern Ireland) 2010 in Northern Ireland.
Building Regulations 2010, Approved Document B, also requires emergency lighting in new builds and major renovations. The standard that tells you how to meet these legal duties is BS 5266-1:2025, the current code of practice for emergency lighting of premises (the 2025 edition came into effect on 31 October 2025, replacing the previous 2016 edition). It is not legislation itself, but it is the standard against which compliance is assessed by fire inspectors and insurers alike.
Do You Actually Need Emergency Lighting in Your Building?
Most non-domestic buildings require emergency lighting. But the specific requirement depends on the building, its occupancy type and what your fire risk assessment identifies. So before anything else, ask yourself: would a loss of mains lighting put the people in my building at risk?
If the answer is yes in any part of the building, emergency lighting is needed there. That typically covers escape routes, stairways, corridor junctions, changes in floor level, toilet facilities over 8m², plant and control rooms, and anywhere fire-fighting equipment or alarm call points are located.
There are narrow exceptions. BS 5266-1 notes that a room of no more than 12m² with no specific risks identified does not require emergency lighting, provided it is not itself an escape route from another room. A single-occupancy toilet for an able-bodied person is also exempt. But these are edge cases. When in doubt, a fire risk assessment will give you a clear, premises-specific answer.
Emergency Lighting for an HMO: What Landlords Need to Know
For landlords managing houses in multiple occupation, emergency lighting for an HMO is often a condition of your licence, not just a recommendation. Local authorities frequently require it in communal areas: entrance halls, stairwells and shared corridors. Individual rooms are generally treated as domestic spaces, but communal areas are not. Check your local authority’s HMO licensing conditions alongside your fire risk assessment to confirm exactly what applies to your property.
Emergency Lighting Types: Escape Routes, Open Areas and High-Risk Zones
Understanding the different emergency lighting types is the foundation of any compliant installation. The distinctions are not just technical. They affect which products you buy, where you put them and what illumination levels you need to achieve.
Escape route lighting is the most common type you will encounter. It illuminates the designated escape routes through a building so people can move safely toward exits. Under BS 5266-1:2025, the minimum horizontal illuminance on the floor of the whole escape route is 1 lux, excluding a border zone at each side.
Open area lighting (sometimes called anti-panic lighting) serves larger, open spaces: atria, open-plan floors, assembly halls. In these spaces, the risk is that people cannot identify which direction leads to an escape route, rather than not being able to see the route itself. The minimum requirement is 0.5 lux across the core floor area, excluding a 0.5m border around the perimeter.
High risk task area lighting applies wherever people are carrying out dangerous activities: operating machinery, managing a production line, running a control room process. A sudden loss of light in these areas creates an immediate physical hazard, so illuminance must be at least 10% of the normal maintained lighting level for that task, and never less than 15 lux.
All three are forms of emergency escape lighting and are subject to the legal requirements under the Regulatory Reform (Fire Safety) Order 2005. With the types understood, the next question is how your chosen luminaires should behave during normal use.
Maintained vs Non-Maintained Emergency Lights: Which Mode Does Your Building Need?
This is one of the most consequential decisions in the whole process, and it comes down to how your building is used.
Non-Maintained Emergency Lighting
Non-maintained emergency lighting is off during normal building operation. It detects the loss of mains power and switches on automatically from its battery. It is the standard choice for workplaces where artificial lighting is in use whenever the building is occupied: offices, warehouses, schools, care homes, retail premises. Cost-effective, straightforward to install and widely used across the UK.
Maintained Emergency Lights: When You Need Them
Maintained emergency lights are on continuously. They run from the mains during normal use and switch to battery power when the mains fails. They are required in places of public assembly where dimmed or low lighting is in use: cinemas, theatres, nightclubs and entertainment venues. They are also the standard choice for illuminated exit signs in public spaces, even in well-lit areas, because they provide clear route guidance during any evacuation regardless of whether the power has failed.
Combined Emergency Lighting
Combined emergency lighting contains two or more lamps, with at least one on the emergency supply and the others on mains. These are also called switchable emergency lights. A combined emergency luminaire can operate in either maintained or non-maintained mode, which makes them a flexible choice in buildings where different areas have different requirements.
Not sure which mode your premises needs? BS 5266-1 contains a detailed list of premises types and the recommended mode for each.
Self-Contained vs Central Battery Emergency Lighting Systems
Once you know your operating mode, you need to decide how your system is powered. There are two fundamentally different approaches, and the right one depends on the size and complexity of your building.
Self-Contained Emergency Lighting: The Most Common Choice
Self-contained emergency lighting is the most widely installed solution for smaller and medium-sized premises across the UK. Each luminaire has its own built-in battery. When mains power fails, the battery in that individual unit activates the emergency lamp. If one fitting fails, the rest of the system carries on. No dedicated battery room is needed, installation uses standard wiring and the system is straightforward to extend.
The trade-off is that batteries in individual units are exposed to varying temperatures, which can affect their service life. Battery replacement cycles are typically every three to four years, depending on battery chemistry and the manufacturer’s specification.
Central Battery Emergency Lighting Systems
Central battery systems power slave luminaires throughout the building from a single battery source. Maintenance is managed from one location, battery life is significantly longer for large battery banks and the slave luminaires themselves tend to be less expensive. The upfront investment is higher, fire-resistant cable is required between the central battery and every slave luminaire, and a fault in the central unit can affect a large section of the system at once.
For most offices, schools, care homes and retail premises, self-contained fittings are the practical choice. Central battery systems tend to be specified for large, complex buildings: hospitals, multi-storey commercial developments and venues with specific resilience requirements.
Battery Emergency Lighting and LED Emergency Lights: Why LED Is Now the Default
The vast majority of new emergency lighting installations in the UK now use battery emergency lighting with LED light sources. Emergency LED lighting has largely replaced fluorescent and incandescent technologies, and for good reason.
LED emergency lights consume far less power. That means a smaller battery can deliver the same duration of illumination. LED lamps also last longer and tolerate frequent switching better than older technologies, which matters in maintained fittings and during regular test cycles. Because LED emergency lighting draws less current from the battery, it tends to maintain consistent output across the full emergency duration rather than dimming as the battery discharges.
If you are replacing older fittings, upgrading to LED emergency lights makes sense on every measure: running costs, replacement frequency and performance. Modern LED emergency fittings are available across every form factor: bulkheads, downlights, battens and exit signs.
Plug In Emergency Lighting: What It Can and Cannot Do
Plug in emergency lighting refers to portable, socket-fed units that require no hardwired installation. They have genuine uses, but it is important to understand their limits before buying.
For commercial premises subject to the Regulatory Reform (Fire Safety) Order 2005, plug in units are not a substitute for a fixed, commissioned and certified installation. A fire inspector will expect to see hardwired fittings with a proper commissioning certificate and test records.
That said, plug in emergency lighting does have a place. It can provide temporary cover during building works or fit-outs. It can supplement fixed lighting in specific locations where a permanent installation is being planned.
Emergency Lighting for the Home
There is currently no legal requirement for emergency lighting in private dwellings. Homeowners asking about emergency lighting for the home are not dealing with the same compliance landscape as commercial premises. Even so, rechargeable socket-mounted emergency lights or portable emergency torches are a practical precaution, particularly in larger properties or homes where occupants have mobility considerations.
Where Emergency Lighting Is Installed: Siting Luminaires Correctly
Knowing where to put your luminaires is as important as choosing the right ones. BS 5266-1 and BS EN 1838 both set out clear requirements on positioning, and the principle is consistent: people must always be able to see where the exit is and locate any safety equipment, regardless of how far they can see across the building.
The standard identifies key points of emphasis where a luminaire must be positioned. These are:
- Each exit and final exit door
- Every change of direction along an escape route
- Each stairway, so that every step receives direct light
- Each intersection of corridors
- Near each fire alarm call point
- Near each piece of fire-fighting equipment
- Outside each final exit, to illuminate the area immediately beyond
- In lift interiors, where lifts form part of the evacuation plan identified in the risk assessment
- Toilet areas over 8m² (and all toilets accessible to disabled people)
That list is a starting point, not an endpoint. Once all points of emphasis are covered, designers must also check whether additional luminaires are needed to achieve the minimum illuminance levels along the full length of escape routes. Every escape route compartment must have at least two luminaires, so that if one fails, the route remains lit.
Exit signs should use the pictogram format specified in BS EN ISO 7010 and be illuminated wherever the route to a final exit is not immediately visible.
How Long Must Emergency Lighting Last? Duration Requirements Explained
Duration is more misunderstood than almost any other aspect of emergency lighting, so it is worth being precise.
The minimum duration for emergency escape lighting is one hour. But a one-hour duration is only acceptable if the building will be completely evacuated immediately on mains failure and not reoccupied until the batteries have fully recharged. That is a narrow set of circumstances.
For most premises, including any building with sleeping accommodation and any building that might be reoccupied soon after a power failure, the required minimum duration is three hours. Hotels, care homes, student accommodation, residential blocks and HMOs all fall into this category. Three hours is also the standard for the annual full duration test.
When you are specifying or purchasing fittings, always check the duration rating on the product. A unit rated for one hour is not appropriate for sleeping accommodation or premises that may be reoccupied quickly after a power failure.
Self-Test Emergency Lighting: Reducing Your Compliance Burden
Self-test emergency lighting is one of the most practical developments the industry has produced in recent years. These are luminaires with a built-in test module that runs automatic functional tests and logs the results, with no manual intervention required from you or your team.
Think about what manual testing involves on a large site. Someone flicks a switch or isolates a circuit, then walks the entire building checking every luminaire is working. They restore the supply, then walk the building again to confirm every unit is recharging. Then they record it all. In a building with dozens or hundreds of fittings, that process takes hours and causes real disruption to occupants.
Emergency lighting is not normally linked to the fire alarm system. It is usually triggered by a failure of the normal electrical supply, although some buildings may have additional links or integrations between the two systems.
To ensure these units are ready when needed, self-testing emergency lighting handles the required monthly flick test automatically. The unit runs a short simulated mains failure at a preset time, checks that the emergency lamp activates, confirms the battery is holding charge, and flags any faults via an indicator light. In more sophisticated systems, a remote monitoring panel or addressable test system collects results from all fittings in one place. You still need to review the results and address any failures, but the testing itself happens without you.
For responsible persons managing multiple buildings or busy commercial premises, self-test emergency lighting is worth the additional upfront cost. It reduces the risk of tests being missed, and a missed test is a compliance gap.
Emergency Lighting Testing: The Flick Test, Full Duration Test and Record-Keeping
Emergency lighting systems are only useful if they work when called upon. Testing is a legal obligation, set out in BS EN 50172:2024 and BS 5266-1:2025. Here is what the standards require.
Monthly Testing: The Flick Test
The flick test must be carried out every month. It is a short functional test that simulates a mains failure long enough to confirm the luminaire activates and the battery is holding charge, but short enough to avoid unnecessarily depleting it. Every luminaire and exit sign must be checked to confirm it is present, clean and operating correctly. The results must be recorded in the emergency lighting section of your fire safety log book.
Annual Testing: The Full Duration Test
The full duration test must be carried out once a year. The primary lighting circuit is switched off and the emergency lighting system must run for its full rated duration (typically three hours), remaining fully operational and maintaining adequate lux levels throughout. All luminaires and signs are checked at the start, during and at the end of the test. Any failures must be recorded and remedied promptly.
Full duration tests should be timed to minimise disruption and allow batteries to recharge fully before the building returns to normal occupation. Many organisations schedule the annual test alongside fire alarm maintenance, because the waiting time during the drain test can be used productively.
Five-Year Photometric Verification
BS 5266-1:2025 introduced a further requirement that was not present in earlier editions: photometric verification every five years. This goes beyond switching fittings on to check they activate. It involves measuring actual illuminance levels across the building to confirm the system still delivers the light output the original design specified. Ageing lamps, layout changes and obstructions can all reduce performance over time, and the five-year check is the formal mechanism for catching that drift before it becomes a compliance failure.
Central Battery Systems: Daily Inspection
For central battery systems only, a daily visual inspection of the central power supply indicators is also required. This confirms the system is operational. It does not involve testing the luminaires themselves.
The results of all tests, including failures and the remedial action taken, must be logged in an emergency lighting log book. We offer a free digital fire safety log book with dedicated sections for emergency lighting test records. An emergency lighting test sheet kept up to date is not just good practice. It is required under BS 5266-1 and may be requested during a fire safety inspection.
Emergency Lighting Certificates: What You Need and When
When a new emergency lighting system is installed, the installer provides a commissioning certificate confirming the system meets the relevant standards at the point of installation. This is your emergency lighting certificate for the initial installation.
Beyond commissioning, the annual full duration test should be documented with an emergency lighting periodic inspection and testing certificate. This records who carried out the test, when, and what the results were. Together, the commissioning certificate and the annual testing certificate form the core of your compliance documentation.
Keep them on site, available for inspection alongside the emergency lighting section in your fire safety log book, and test sheet records. If you manage multiple sites, a consistent approach to record-keeping across all buildings makes audits significantly more straightforward.
How To Meet Regulations for Emergency Lighting: A Practical Summary
Emergency lighting regulations can feel like a tangle of overlapping documents. Standard regulations for emergency lighting draw on legislation, British Standards and European harmonised standards all at once, so this section is a guide to emergency lighting compliance in plain terms: what the documents are, what they require and how they fit together.
Emergency lighting systems are central to building safety for any business, school, care home or rented property. They are not optional, and they are not a box-ticking exercise. Here is how the framework works in practice.
The Regulatory Reform (Fire Safety) Order 2005 is the legal requirement for England and Wales. It requires the responsible person to provide and maintain adequate emergency escape lighting. In Scotland, equivalent duties arise under the Fire (Scotland) Act 2005 and the Fire Safety (Scotland) Regulations 2006. In Northern Ireland, they arise under the Fire and Rescue Services (Northern Ireland) Order 2006 and the Fire Safety Regulations (Northern Ireland) 2010.
BS 5266-1 is the code of practice that shows you how to meet those legal duties. BS EN 50172:2024 sets out minimum testing requirements. BS EN 1838:2024 specifies the illuminance levels required. They work as a hierarchy: legislation sets the obligation, standards define how to fulfil it and product standards govern the equipment itself.
In practice, meeting those regulations means:
- Having a fire risk assessment that identifies where emergency lighting is needed
- Installing a system designed and certified by a competent person
- Carrying out monthly flick tests and annual full duration tests
- Recording all test results and any remedial action in the emergency lighting section of a fire safety log book
- Keeping commissioning and periodic inspection certificates on site
There is no threshold below which a non-domestic premises is exempt from these obligations. Small offices, care homes and warehouses all carry the same duty.
Emergency Lighting for Different Building Types
Different buildings have different requirements, and it is worth knowing what applies to your situation before you start specifying products.
Offices
Most offices require non-maintained emergency lighting on all escape routes. Rooms of no more than 60m² that are not themselves part of an escape route from the wider building may not require it, but any corridor, stairway or main exit route must be covered.
HMOs and Rented Properties
Emergency lighting for an HMO is commonly required in all communal areas: entrance halls, stairways and shared corridors. Individual rooms are treated as domestic spaces, but the communal parts of the building are not. Always check your HMO licence conditions.
Care Homes and Sleeping Accommodation
Three-hour battery duration is required across the board. Maintained exit signs are standard in sleeping areas. The fire risk assessment will specify siting in detail.
Industrial and Warehouse Premises
High risk task area lighting requirements may apply in addition to escape route lighting wherever dangerous processes or machinery are present. The fire risk assessment identifies these areas.
Schools and Educational Buildings
Emergency lighting is required on all escape routes, stairways and assembly areas. Self-test fittings are a popular choice for site managers, because they reduce the administration burden significantly.
Choosing Emergency Lighting Products: Where to Start
With all of the above in mind, what emergency lighting products do you actually need?
Start with your fire risk assessment. A fire risk assessment carried out by a competent person will tell you where emergency lighting is required and often indicate the type and mode appropriate for each area of the building.
For most standard commercial premises, self-contained non-maintained LED bulkheads or battens are the practical starting point: reliable, cost-effective and straightforward to maintain. Exit signs should be illuminated, in the correct pictogram format, positioned wherever the route to a final exit is not immediately obvious.
If your premises is a place of public assembly, or if the fire risk assessment identifies areas of higher risk, discuss maintained or combined fittings with a qualified installer. And if you want to reduce your ongoing testing workload, self-test emergency lighting is worth considering. The time saved across monthly flick tests in a building with many fittings adds up quickly, and automatic logging reduces the risk of compliance gaps.
Browse our full range, including emergency LED lighting, self-test units, plug in emergency lighting, exit signs and a fire log book with an emergency lighting section, at our emergency lighting category page. If you need help working out exactly what your building requires, our team is ready to help.
