Emergency Lighting Types: Maintained and Non-Maintained Explained
Understand when emergency lights illuminate, how their backup power is arranged and what their labels can tell you.
By EICR Certificates London · Updated 1 November 2026
Maintained emergency lighting provides illumination during normal operation and when the normal lighting supply fails; non-maintained emergency lighting illuminates only when that supply fails. Switchable maintained fittings qualify the shorthand “always on”: their normal-use illumination can be switched where the equipment supports it. EICR Certificates London explains these distinctions for landlords, agents and premises managers across Greater London. Knowing a fitting’s type helps you understand its intended behaviour, but does not establish its condition or suitability. The terminology is used across the UK; legal references here concern England.
Maintained vs Non-Maintained Emergency Lighting at a Glance
The main difference is whether the emergency light also provides illumination while the normal lighting supply is available.
| Behaviour | Maintained | Non-maintained |
|---|---|---|
| Normal operation | Provides normal-use light, subject to any supported switching. | Emergency lamp remains off; a separate status indicator may be visible. |
| Normal-supply failure | Provides emergency illumination using backup power. | Emergency lamp comes on using its emergency supply. |
| Supply restored | Returns to its configured normal-lighting operation. | Returns to its usual standby state. |
| Meaning of the label | Describes illumination during ordinary use and supply failure. | Describes emergency-only lamp operation. |
| What the label cannot prove | Battery condition, adequate coverage or compliance. | Backup duration, suitability or successful testing. |
Switchable maintained fittings: supported models allow their everyday lighting function to be switched while retaining automatic emergency operation. Both modes depend on a functioning emergency supply. A glowing exit sign alone does not demonstrate that its backup works.
For assessment of your existing system, discuss emergency lighting testing in London.
What Is Maintained Emergency Lighting?
Maintained emergency lighting combines normal-use illumination with emergency illumination when the normal supply fails. Some applications use continuous illumination; others use fittings with a switchable everyday lighting function. The manufacturer’s documentation and installed configuration determine which behaviour applies. A lamp working from mains power has not thereby demonstrated its emergency performance.
Illustrative example: an exit sign could remain illuminated while a building is occupied and continue displaying the escape direction during a power failure. That describes an intended function, rather than a test result or a particular installation.
Terminology: “maintained” names the operating mode, not the fitting’s servicing history.
What Is Non-Maintained Emergency Lighting?
Non-maintained emergency lighting keeps its emergency lamp off during normal conditions and illuminates when the normal lighting supply fails. In a hypothetical corridor, a dedicated emergency fitting could therefore be dark while ordinary ceiling lights illuminate the passage. Any status indicator is separate from the main emergency lamp; its meaning depends on the equipment documentation.
What Else Can “Emergency Lighting Type” Describe?
Emergency-lighting descriptions can identify what the light is for, when it operates or where its emergency power comes from. Several descriptions can apply to one fitting.
- Purpose: what needs illuminating?
- Operation: when should it light?
- Power source: where is the backup battery?
Lighting Purpose: Escape Routes, Open Areas and Higher-Risk Tasks
Purpose describes the area or activity the emergency lighting supports.
- Escape-route lighting: illuminates the route people follow towards safety, helping them recognise the way out and negotiate features such as stairs.
- Open-area or anti-panic lighting: provides illumination across a space so occupants can orient themselves and move towards an escape route.
- High-risk task-area lighting: supports people dealing with a potentially dangerous activity, helping them stop or make the task safe before leaving.
- Illuminated exit signs: identify exits or indicate the direction of escape; they do not by themselves establish that the surrounding route is adequately lit.
Standby lighting supports continued activities after a supply interruption. Its purpose differs from escape lighting, and its presence is not permission to remain in a building.
Power Arrangement: Self-Contained or Central Battery
Self-contained fittings hold their own batteries; a central battery system supplies emergency power to multiple fittings.
| Self-contained | Central battery |
|---|---|
| Each fitting has its own battery provision, assessed with that unit. | A shared battery source supplies connected emergency luminaires; assessment includes that source and the associated system. |
Hypothetical description: a “self-contained non-maintained escape-route fitting” identifies its power arrangement, operating mode and purpose. Central battery is therefore not a third operating mode. Battery ageing can reduce available duration in either arrangement; neither description establishes remaining capacity or a replacement date.
Fitting Features: Combined Lighting and Automatic Testing
A fitting’s construction and testing features describe different things from its maintained or non-maintained operating mode.
- Incorporated emergency lighting: an ordinary light fitting can include an emergency function. Its appearance alone may not reveal that capability.
- Separate emergency fitting: dedicated equipment provides emergency illumination alongside the building’s general lighting. Construction does not determine its operating classification.
- Automatic testing: equipment can perform supported checks automatically. Results still need review, appropriate records and action on defects. The manufacturer’s instructions establish the functions provided; “self-test” does not mean that maintenance manages itself.
How Can You Tell Whether a Fitting Is Maintained or Non-Maintained?
Confirm the configured operating mode from the fitting documentation and system records; whether it is lit at one moment is only a clue.
- Existing records: gather the asset list, commissioning information, latest emergency lighting test report and logbook.
- Visible identification: note a model reference only if readable safely from an accessible position, without opening the fitting or climbing.
- Manufacturer documentation: check the supported modes. A model offering several configurations does not establish which one was selected.
- System responsibility: ask the person managing the installation to confirm its intended operation and any recorded alterations.
What Determines Which Emergency Lighting Arrangement a Building Needs?
The appropriate arrangement depends on how the premises are used, the escape strategy and the findings of a suitable assessment.
- Hypothetical dimmed public space: visitors unfamiliar with the layout may need clearly visible exit directions while general lighting is reduced. Assessment considers that normal operating condition.
- Hypothetical normally lit workplace: familiar occupants may usually navigate using general illumination, but assessment must still consider visitors and what happens when that lighting fails.
A building can contain several arrangements. Commercial premises and communal residential areas do not all need an identical specification. For England’s duties, testing and records, see Emergency Lighting Regulations and Testing Requirements.
Arrange Emergency Lighting Testing in London
EICR Certificates London provides emergency lighting testing for London premises. Qualified, insured electricians. Evening and weekend appointments available. Testing is quoted for the work required; you do not need to identify every fitting’s mode before making an enquiry.
Discuss Emergency Lighting Testing: have the premises address, building use, approximate fitting count if known, access information and any existing report ready. These details help establish the inspection and reporting scope for your quotation.
Emergency Lighting Type Questions
An operating-mode label does not establish maintenance needs, legal suitability or the price of testing. These questions cover the remaining practical distinctions.
Do Emergency Lights Have to Be Maintained?
Emergency lights need appropriate upkeep, but that does not mean every fitting must operate in maintained mode. Maintenance concerns equipment condition; the classification concerns illumination. The Responsible Person needs suitable arrangements for checks and specialist testing. Mode selection depends on the premises and assessed need.
How Often Should Maintained Emergency Lighting Be Checked?
Maintained emergency lighting still needs routine checks and testing; being illuminated during normal use does not demonstrate emergency performance. The usual programme includes monthly functional checks and annual testing for the full rated duration. Additional checks depend on the system, including central battery equipment. The regulations guide linked above explains the testing framework and records.
What Are the Legal Requirements for Emergency Lighting in the UK?
This guide’s legal context is England, where emergency escape-lighting needs are assessed under the applicable fire-safety duties. The Responsible Person must address the premises’ requirements under the Fire Safety Order. A mode label cannot establish legal suitability. BS 5266-1:2025 is a code of practice, not legislation; the earlier regulations link covers applicability.
How Do You Wire a Non-Maintained Emergency Light?
The wiring arrangement must follow the specific equipment instructions and be designed and installed by someone competent for the work. A generic operating description cannot determine connections or suitability. Assessment must consider the fixed installation and applicable BS 7671:2018+A4:2026 requirements alongside the manufacturer’s documentation.
How Much Does an Emergency-Lighting Test Cost?
Emergency-lighting testing is quoted for the premises and the scope of work. Relevant information includes fitting count, access, the supply arrangement and the inspection, testing and reporting required. A central battery installation may involve different equipment from individual battery fittings. Identifying maintained or non-maintained operation alone cannot determine the quotation.