Emergency Lighting: UK Regulations, Testing and Installation Guide
- What is emergency lighting and why is it important?
- Where is emergency lighting required in the UK?
- Emergency lighting regulations in the UK
- Types of emergency lighting
- How is emergency lighting installed and tested?
- Emergency lighting certificates and test equipment
- What Is an Emergency Light Test Key?
- Emergency lighting during power cuts
- Backup power options for emergency lighting and essential equipment
- How to choose emergency lighting products
- Common emergency lighting mistakes to avoid
- Conclusion
- Frequently Asked Questions
Emergency lighting is easy to overlook because, under normal conditions, it may rarely be noticed. Its importance becomes clear when the normal lighting supply fails. In a workplace, shop, communal building or other occupied premises, suddenly losing light can make stairs, corridors, changes in level and exits difficult to navigate.
A properly designed emergency lighting system provides illumination where it is needed, so occupants can respond safely when normal lighting fails. In the UK, its provision forms part of wider fire-safety responsibilities in many non-domestic premises.
Regular emergency light testing, appropriate installation and maintenance are therefore essential rather than optional afterthoughts. Separate backup equipment can also be useful during wider power cuts. For example, a portable power station can support compatible plug-in lighting, communication devices and other selected equipment when the normal electricity supply is unavailable. However, supplementary backup power does not replace a compliant emergency escape lighting system where one is required.
What is emergency lighting and why is it important?
Emergency lighting is lighting provided for use when the normal lighting supply fails. Within fire safety, the particularly important category is emergency escape lighting, which provides enough illumination for people to identify and use escape routes safely when normal lighting is unavailable.
UK government fire-safety guidance makes an important distinction here. “Emergency lighting” is a broad term that can include lighting intended to allow activities to continue during a power cut, whereas emergency escape lighting specifically supports safe escape.
In practical terms, emergency lighting is installed to illuminate routes and locations that could otherwise become unsafe when normal lighting disappears. Depending on the premises and its risk assessment, this can include corridors, stairways, exits, changes in direction or level, open areas and locations associated with fire-safety equipment.
Its purpose is not to recreate normal daylight conditions. Instead, emergency lights provide the visibility needed for occupants to orient themselves, identify escape routes and move towards safety.
That is particularly important in unfamiliar buildings. Someone may know the layout of their own home in darkness, but visitors to an office, hotel, shop or public building cannot be expected to know where every staircase, door or obstacle is located.
Where is emergency lighting required in the UK?
There is no sensible rule that says every building needs the same number and type of emergency lights.
Under the Regulatory Reform (Fire Safety) Order 2005, where emergency routes and exits require illumination, they must be provided with emergency lighting of adequate intensity if their normal lighting fails.
Government guidance explains that emergency lighting may only be unnecessary in some very small premises where sufficient reliable borrowed light would remain available. In larger premises, the adequacy of existing emergency lighting should be considered as part of the fire risk assessment.
Typical locations requiring consideration include:
Escape routes and corridors
Stairways and changes in level
Final exits
Areas without adequate natural or borrowed lighting
Larger open areas
Locations where occupants need to identify safety equipment
Areas where loss of normal lighting could create an additional hazard
The correct arrangement depends on factors such as the building layout, occupancy, use of the premises and findings of the fire risk assessment.
Private domestic dwellings are treated differently from workplaces and public premises, although communal areas in certain residential buildings may fall within relevant fire-safety requirements. Anyone responsible for a commercial, communal or public building should therefore rely on an appropriate fire risk assessment rather than copying a generic lighting layout.
Emergency lighting regulations in the UK
Understanding emergency lighting regulations means separating legal duties from technical standards.
The Regulatory Reform (Fire Safety) Order establishes legal fire-safety duties in England and Wales. British Standards, meanwhile, provide detailed technical guidance that helps designers, installers and responsible people develop and maintain suitable systems.
They should not simply be described as if they were the same thing.
Regulatory and fire-safety responsibilities
For premises covered by the Fire Safety Order, the responsible person has duties relating to fire precautions, risk assessment and the maintenance of relevant safeguards.
Emergency escape lighting forms part of that picture. Where escape routes need artificial illumination, adequate emergency lighting must be available where necessary if the normal supply fails.
The fire risk assessment is fundamental. It should consider whether the existing system is suitable for the building and its occupants rather than merely confirming that emergency luminaires are physically present.
The system must also remain effective after installation. Government guidance specifically states that emergency lighting should be regularly tested and maintained.
That means responsibility does not end when an installer leaves the building.
BS 5266 and emergency lighting
The current principal British code of practice is BS 5266-1:2025, Emergency lighting — Emergency lighting of premises — Code of practice. It was published in October 2025.
BS 5266-1 provides recommendations and guidance covering the design, installation, and wiring of emergency lighting systems. Its scope includes supporting safe evacuation, protecting occupants who may remain in a building, and supporting the use of essential safety equipment.
It is particularly relevant to professionals such as designers, contractors, engineers, fire-safety specialists, facilities teams, and responsible persons.
The standard should be applied alongside the particular building's risk assessment and other applicable requirements. Simply purchasing products labelled “emergency lights” does not establish that the overall system is appropriately designed.
BS EN 1838 and emergency escape lighting
Another important current standard is BS EN 1838:2024, Lighting applications — Emergency lighting for buildings. It replaced BS EN 1838:2013.
BS EN 1838 addresses the luminous requirements for emergency escape and standby lighting. In other words, it deals with the lighting performance required where these systems are needed.
The 2024 revision introduced several changes. Among them, requirements for escape-route illumination now address the total width of escape routes rather than focusing only on the centre line, and the standard includes updated treatment of escape routes through open areas and local-area lighting.
For new installations, refurbishments and significant alterations, using current standards rather than relying on outdated guidance is important.
Types of emergency lighting
Different emergency lighting products serve different functions. Understanding the terminology helps when assessing an existing system or planning a new one.
Maintained emergency lights
A maintained emergency light operates during normal conditions and remains illuminated, or continues operating from its emergency supply, when normal power fails.
Maintained lighting is useful where the same fitting needs to provide illumination during everyday operation as well as during an emergency. Maintained exit signs are a familiar example.
Because the luminaire is already operating, occupants can see the sign or illuminated area during normal use as well as following a supply failure.
Non-Maintained emergency lights
A non-maintained emergency light normally remains off while the ordinary lighting supply is functioning. It illuminates automatically when the relevant normal supply fails.
These fittings are commonly used where continuous illumination is unnecessary, but emergency illumination must become available if normal lighting is lost.
Whether maintained or non-maintained fittings are appropriate depends on the application, building use and emergency-lighting design.
Emergency bulkhead lights
An emergency bulkhead light is a robust type of luminaire commonly seen in corridors, stairways, exits and utility areas.
Bulkhead designs are popular because they can provide straightforward emergency illumination in practical environments. Different models may be maintained, non-maintained or configurable between operating modes.
Selection should be based on the required lighting performance, environment, mounting position, emergency duration, and system design rather than appearance alone.
Emergency exit signs
Exit signs help occupants identify the direction of escape and locate exits. Illuminated or internally lit signs can remain visible when normal lighting fails.
Correct positioning is essential. A sign is of little value if it is obscured, difficult to understand or not visible from the relevant approach.
Exit signage and emergency lighting should therefore be considered as parts of the overall escape strategy rather than as unrelated products.
How is emergency lighting installed and tested?
Effective emergency lighting installation begins with assessment and design, not with deciding where fittings look convenient.
The installation needs to reflect actual escape routes and risks within the premises. It then needs to be commissioned, tested, and maintained so that its performance does not deteriorate unnoticed.
Assess escape routes and risk areas
The first stage is understanding the building.
Identify escape routes, stairways, exits, changes in direction and level, open areas and other locations where loss of normal lighting could affect safe movement.
The fire risk assessment provides essential context. Occupancy also matters. A building used by people unfamiliar with its layout may require different consideration from a small workplace occupied by the same few people each day.
Changes to the premises should trigger further consideration. New partitions, altered escape routes or a change of use can affect whether the existing lighting arrangement remains suitable.
Select and position suitable lighting
Once the relevant areas have been identified, suitable luminaires and signs can be selected.
Important factors include required illumination, emergency duration, mounting position, environment, and whether maintained or non-maintained operation is appropriate.
Positioning should support the complete escape strategy. Concentrating fittings in one convenient area while leaving a staircase or route change poorly illuminated defeats the purpose of the system.
This is why a professional design based on current standards is preferable to estimating the number and spacing of fittings without calculations or assessment.
Install and commission the system
Installation should follow the approved design, relevant electrical requirements, and manufacturers' instructions.
After installation, commissioning verifies that the system performs as intended. This includes checking operation under simulated loss of the normal supply and confirming that relevant luminaires and signs function correctly.
Documentation is also important. Records help building managers understand what was installed and provide a basis for future inspection, maintenance, and modification.
Routine functional tests
Emergency lighting testing should continue throughout the life of the system.
UK government fire-safety guidance recommends monthly functional testing. During this check, the test facility is operated, so the emergency units run from their emergency supply and each relevant lamp can be checked for operation.
The objective of this routine test is not simply to operate a switch. Someone should check that the relevant fittings actually illuminate and identify faults requiring attention.
Modern self-testing systems may automate parts of the process, but records and appropriate maintenance remain important.
Full-duration testing and record keeping
In addition to monthly functional checks, government guidance calls for annual testing and maintenance by a competent person and describes an annual full-discharge test as a typical part of the testing regime.
A full-duration test assesses whether the emergency system can continue operating for its designed duration rather than merely switching on for a few minutes.
Testing must be planned carefully. Government guidance notes that batteries can require substantial time to recharge following a full-discharge test, so the premises should not be left without effective emergency-lighting provision while the system recovers.
Test results, faults, repairs and maintenance should be recorded. Government fire-safety checklists specifically ask whether monthly and annual testing routines and maintenance records are in place.
Emergency lighting certificates and test equipment
Testing terminology can sometimes make emergency lighting appear more complicated than it is. Two frequently encountered terms are the emergency light test key and emergency lighting certificate.
What Is an Emergency Light Test Key?
An emergency light test key is used with a dedicated test switch to simulate failure of the normal lighting supply without having to create a real building-wide power cut.
Government guidance describes test facilities that use a fishtail-type key inserted into a special switch located near the relevant lighting controls or distribution equipment.
When the test mode is activated, the relevant emergency luminaires should operate from their emergency supply. The person carrying out the test can then walk the area and confirm that the required lights are functioning.
The exact procedure depends on the installed system, so manufacturer and installer instructions should be followed.
What is an emergency lighting certificate?
An emergency lighting certificate provides documented evidence associated with the design, installation, verification, or testing of a system.
The documentation required depends on the work undertaken and the applicable standards. For a new installation or substantial alteration, proper certification and commissioning records help demonstrate what was installed, how it was assessed, and whether it performed as required at that point.
However, a certificate should not be treated as permanent proof that a system remains satisfactory forever.
Buildings change, batteries deteriorate, and luminaires can fail. Ongoing testing, inspection, maintenance, and appropriate records are still required after initial certification.
How long should emergency lights stay on?
There is no responsible way to select emergency duration from a generic rule without considering the building and applicable design requirements.
The required duration depends on factors including the premises, evacuation strategy, intended use of emergency lighting, and applicable standards.
Many installations are designed around a three-hour emergency duration, but system requirements should be established through the proper design and risk-assessment process rather than assuming that every building has an identical requirement.
The annual full-duration test should then confirm that the system can meet the duration for which it was designed.
Emergency lighting during power cuts
A power cut and a fire are not the same event, but failure of the normal electricity supply demonstrates why independent lighting is important.
A wider outage may leave ordinary lights, routers, computers and other equipment without power simultaneously. A compliant emergency escape lighting system should not depend solely on the normal lighting supply that has just failed.
For broader advice on preparing for outages, EcoFlow's guide to UK power cuts covers backup lighting, communications and other practical preparations.
How emergency lighting works during an outage
Emergency luminaires typically have access to an alternative energy source, such as integral batteries or an appropriately designed central system.
When the relevant normal lighting supply fails, emergency lighting should provide the necessary illumination according to the system design.
This automatic response is one reason ordinary torches cannot simply replace required fixed emergency escape lighting in a commercial building. Torches remain useful supplementary equipment, but they may not be in the right place, charged, or immediately accessible when an unexpected failure occurs.
What can you use as supplementary backup power?
For general resilience, additional battery-backed lighting and portable power can be useful.
Rechargeable lamps and torches can provide extra local illumination. A portable power station can support compatible plug-in lights, communication equipment, routers, laptops, and other selected loads during an outage.
EcoFlow's guide to a home emergency power supply explains how stored battery power can support essential devices when the grid is unavailable.
The distinction is critical: supplementary backup power does not remove the need for compliant emergency escape lighting where legislation, risk assessment, or the building design requires it.
Backup power options for emergency lighting and essential equipment
Portable battery systems can complement an outage plan by supporting compatible equipment that sits outside, or in addition to, the statutory emergency-lighting installation.
They are particularly relevant when a power cut affects more than lighting. Communication devices, network equipment, laptops, and other essential loads may also need temporary power.
EcoFlow DELTA 3 Max Series for supplementary backup
The EcoFlow DELTA 3 Max Series Portable Power Station provides 2,048Wh of battery capacity and uses LFP battery chemistry. The standard DELTA 3 Max provides up to 2,400W AC output, while the DELTA 3 Max Plus provides up to 3,000W.
That capacity can make the series useful as supplementary backup for compatible plug-in LED lighting, phones, laptops, routers, and selected equipment during a power cut.
Both versions specify a 10ms UPS switchover, although the Plus adds further UPS-related functionality. Whether that switching performance is suitable for a particular connected device should be checked against the device's requirements.
The standard model weighs approximately 20.3kg and the Plus approximately 22.1kg, making them considerably easier to reposition than the larger DELTA Pro 3.
These capabilities should not be confused with emergency-lighting compliance. A portable unit connected to ordinary lamps is not automatically a compliant emergency escape lighting system.
EcoFlow DELTA Pro 3 for higher-capacity backup
For substantially larger energy requirements, the EcoFlow DELTA Pro 3 Portable Power Station has a 4,096Wh capacity and up to 4,000W AC output across five AC outlets, with an 8,000W surge rating.
It supports up to two compatible smart extra batteries, allowing larger storage configurations where extended backup is required. EcoFlow also specifies up to 2,600W of solar charging input.
At 51.5kg, however, this is a much larger unit than the DELTA 3 Max Series. It is better considered a high-capacity stationary or semi-mobile backup option rather than something intended to be carried frequently.
Its 4,096Wh capacity could support compatible lighting alongside other selected loads during an outage, but runtime depends entirely on the combined wattage of those loads and system losses.
Choosing the right capacity for your needs
Do not choose a battery simply because it has the largest capacity.
First list the equipment you genuinely need during an outage. Then identify each device's power requirement and estimate how long it needs to operate.
A simple theoretical energy calculation is:
Energy required (Wh) = power (W) × operating time (hours)
For example, ten 10W LED lamps represent a 100W lighting load. Running that load for three hours would theoretically require 300Wh. In real use, additional capacity should be allowed for conversion losses and other system consumption.
If routers, computers, refrigeration, or other equipment use the same battery, their loads must be included as well.
For further planning, EcoFlow's guide to light bulb wattage explains the relationship between watts, energy consumption, and LED lighting. This can help when estimating supplementary lighting loads.
How to choose emergency lighting products
When selecting emergency lighting products, there are several factors to consider.
The first step in choosing emergency lighting products is to consider the requirements of the system, not price or appearance.
Examine the requirements for the product and its application, including the type of operation (maintained or non-maintained operation), the duration of the emergency, the way it is mounted, and the level of illumination it requires to function.
If the luminaire is to be installed outdoors or in a challenging environment, environmental protection may be required as well.
This is compatibility as well. Replacement products cannot be chosen at random if this changes the system's performance.
In larger or specialized properties, it is best to select the products as part of a professionally designed system. The purpose is not just to fit sufficient fittings to light the building during a test, but to provide for safe movement and escape based on the building's level of risk and applicable requirements.
Common emergency lighting mistakes to avoid
The greatest pitfall is assuming that the installation of the emergency lights is sufficient and that no further attention needs to be paid. Batteries deteriorate, fittings become damaged, and buildings undergo renovations and changes. Regular testing and maintenance are critical.
The next error is not documenting emergency light testing. A fault may occur regularly, but if it is not documented, then problems might never be resolved.
Another risk is the use of outmoded standards. The current editions include BS 5266-1:2025 and BS EN 1838:2024. Some of the older articles on the web still refer to older editions.
Other avoidable issues are obstructed exit signs, luminaires placed in the wrong location, not rethinking the system following refurbishment, and performing a full test without post-test battery recharge periods.
Last but not least, don't confuse compliant emergency lights with supplementary power. In the event of a power failure, a portable power station, or a standard lamp or torch can be invaluable, but they will not substitute for a well-designed and properly maintained emergency escape lighting system.
Conclusion
Emergency lighting systems are a key element in fire safety planning in many premises in the UK. It's very simple, but very important: in the event of a normal lighting failure, the occupants still need sufficient light to know where to go, what to avoid, and how to get to safety.
To achieve that goal, you won't be able to simply buy a few emergency lights. The system should be responsive to the fire risk assessment and the legal obligations and existing technical requirements. Installing the lights properly, checking them monthly for function, testing annually, maintaining them, and keeping good records all help to ensure they are reliable for the long term.
More battery backup will enhance resilience to power cuts. When there is no electricity, other compatible equipment such as lighting can be connected to the power backup system represented by the EcoFlow DELTA 3 Max Series and the higher capacity version DELTA Pro 3.
However, they should not replace specific emergency escape lighting but should be used as an adjunct to the lighting functions.
Frequently Asked Questions
What is emergency lighting?
Emergency lighting is lighting supplied in the event of failure of the normal lighting supply. In fire safety, emergency escape lighting is lighting that enables occupants to locate and use the fire escape safely in the event of a failure of normal lighting. The term may also be used to refer to lights that are to be used to continue activities during a loss of power.
How often should emergency lighting be tested?
UK government fire-safety guidance recommends monthly functional testing of emergency escape lighting and annual inspection/testing by a competent person. These are full discharge or full duration tests typically done every year. Results and faults should be documented, and the testing procedure should be representative of the installed system and applicable standards.
What is a maintained emergency light?
A maintained emergency light is switched on at normal times and automatically turns off if the normal power supply is lost. This is in contrast to a non-maintained emergency light, which is usually off but activated by failure of the normal lighting supply. The type that can be used will vary based on the building and lighting application.
Can a portable power station be used for emergency lighting?
Use compatible plug-in lights and other equipment to supplement power for short periods of time during a power outage. For instance, the EcoFlow DELTA 3 Max Series features a capacity of 2,048Wh and the EcoFlow DELTA Pro 3 has a capacity of 4,096Wh. It is not to be taken for granted, however, that a portable power station will be used instead of a compliant emergency escape lighting installation where one is required.
Do emergency lights need a certificate?
New or substantially modified emergency lighting systems must be commissioned and documented to show the design, installation and verification of the system. An emergency lighting certificate is a helpful piece of evidence of this process, but regular testing and maintenance will not be superseded by certification. The responsible person should maintain appropriate records and ensure that the system operates correctly.