Emergency lighting is one of those systems in a school that can be easy to overlook when everything appears to be working normally. Teachers, pupils and staff may pass emergency lights, exit signs and illuminated escape routes every day without giving them a second thought. However, when the normal power supply fails, these systems become essential for helping people move safely towards an exit.
Schools have a particular responsibility to ensure emergency lighting is properly maintained, tested and recorded. Government guidance recommends that schools carry out and record a monthly flash test, with more detailed condition testing also forming part of ongoing maintenance. GOV.UK
For schools looking for professional support with their fire safety systems, William Hale Fire & Security can help identify faults, arrange remedial work and ensure emergency lighting systems are properly maintained.
Understanding the most common problems can also help school managers, facilities teams and responsible persons spot warning signs before a minor fault becomes a more serious issue.
Why Emergency Lighting Is So Important in Schools
A school can be a complicated environment from an evacuation perspective. There may be classrooms, corridors, stairwells, assembly halls, sports facilities, dining areas, offices, laboratories and external escape routes.
During normal operation, these areas may be brightly lit. If the electricity supply fails, however, visibility can deteriorate very quickly.
Emergency lighting is designed to provide illumination when normal lighting fails. Escape lighting is particularly important because it helps people identify and follow safe routes out of the building. GOV.UK
This becomes even more important in schools because occupants may include young children who are unfamiliar with emergency procedures, visitors who do not know the building layout and staff who may need to supervise an evacuation.
A properly maintained system should provide sufficient illumination for people to identify escape routes, stairs, exits and other important safety features.
Common Emergency Lighting Problems in Schools
There are several faults that regularly affect emergency lighting systems. Some are obvious, such as a completely failed fitting, while others may not become apparent until the system is tested.
| Common problem | Potential cause | Typical solution |
|---|---|---|
| Emergency light does not illuminate | Failed lamp, LED or battery | Repair or replace faulty component |
| Battery will not hold charge | Battery deterioration | Replace battery |
| Exit sign is dim | LED or battery fault | Repair or replace fitting |
| Test switch does not work | Faulty switch or wiring | Electrical inspection and repair |
| Emergency light flickers | Electrical or component fault | Investigate and replace faulty parts |
| System fails duration test | Weak battery or charging problem | Battery/system repair |
| Damaged diffuser | Impact or deterioration | Replace damaged component |
| Fault indicator remains illuminated | System fault | Investigate and rectify fault |
| Incorrect emergency lighting coverage | Changes to building layout | Review and upgrade system |
| Test records are incomplete | Poor record keeping | Establish consistent testing and documentation |
1. Emergency Lights That Do Not Come On During a Test
One of the most straightforward problems is an emergency light that fails to illuminate when the system is tested.
This can happen for several reasons. The LED or lamp may have failed, the battery could be defective, there could be an issue with the charging circuit or the fitting itself could have developed an electrical fault.
A fitting that works perfectly under normal mains power is not necessarily functioning correctly as an emergency light.
The emergency function needs to be tested separately.
A monthly functional test is intended to simulate a failure of the normal lighting supply and check that emergency luminaires operate correctly. Government guidance recommends that the results of testing are recorded. GOV.UK
How is it fixed?
The first step is identifying why the fitting has failed.
A competent person may need to inspect:
- The emergency battery
- LED or lamp
- Charging circuit
- Test switch
- Electrical connections
- Indicator lights
- Internal components
- Power supply
Depending on the age and condition of the fitting, repairing an individual component may be appropriate. In other situations, replacing the complete emergency light may provide a more reliable long-term solution.
2. Emergency Lighting Batteries Are Failing
Battery problems are particularly common in emergency lighting systems.
Emergency luminaires need an alternative source of power when the normal electricity supply fails. In many systems, this is provided by an integral rechargeable battery.
Over time, batteries naturally deteriorate. They may still appear to function during a short test but fail to provide the required duration when subjected to a longer test.
This is why duration testing is important.
Schools guidance states that a more detailed condition test should include a three-hour battery test, carried out by a competent person. GOV.UK
Signs of a failing battery
Common warning signs include:
- Emergency lights failing shortly after a power interruption
- Fittings going out during a duration test
- Battery fault indicators appearing
- Batteries becoming noticeably old
- Emergency lights taking too long to recharge
- Repeated failures in the same fittings
Replacing an ageing battery can resolve the problem, but the rest of the fitting should also be checked to ensure there is not an underlying charging or electrical fault.
3. Emergency Lights Are Flickering
Flickering emergency lighting should not simply be ignored.
It can indicate an issue with the LED driver, lamp, battery, electrical connection or internal electronics.
In some older systems, intermittent operation may also be associated with ageing components.
The problem may initially appear minor, particularly if the fitting eventually settles down and operates normally. However, emergency lighting should be reliable when it is needed.
How is flickering fixed?
A competent engineer should investigate the fitting rather than simply replacing the lamp without identifying the cause.
If the fitting is relatively modern and otherwise in good condition, replacing a faulty component may be sufficient.
If the unit is old, damaged or repeatedly developing faults, replacing the complete fitting may be more sensible.
4. Exit Signs Are Damaged or Difficult to See
Emergency exit signs play an important role in helping occupants identify escape routes.
In a busy school environment, signs can become damaged over time. They may be hit by sports equipment, knocked during maintenance work or affected by general wear and tear.
A sign may also become difficult to see because the illumination has deteriorated.
This can be particularly problematic in corridors, stairwells and other areas where several possible routes may exist.
How is the problem fixed?
Damaged signs should be repaired or replaced, depending on their condition.
The positioning and visibility of emergency exit signs should also be considered when school buildings are altered.
For example, if a corridor is remodelled, a classroom is converted into another type of space or partitions are installed, the existing emergency lighting arrangement may no longer provide suitable coverage.
5. Emergency Lighting Test Switches Are Faulty
Many emergency lighting systems use test switches to simulate a failure of the normal electricity supply.
A common example is a key-operated test switch.
If the switch is faulty, damaged or inaccessible, the school may struggle to carry out routine testing correctly.
Government fire safety guidance explains that test facilities can take the form of a dedicated test switch and that the exact testing method depends on the installation. GOV.UK
What should happen?
A competent person should inspect the switch and associated wiring.
The switch may need to be replaced, repaired or repositioned.
It is also important that staff responsible for routine checks know where the relevant test switches are located and understand the correct testing procedure for the school’s system.
6. Fault Indicators Remain Illuminated
Modern emergency lighting systems often provide visual indicators showing the condition of the fitting or system.
A persistent warning light can indicate a problem with:
- Battery condition
- Charging
- LED operation
- Mains supply
- Internal electronics
- Communication with a central monitoring system
Ignoring a warning indicator because the emergency light still appears to work can create problems later.
The purpose of these indicators is to provide an early warning that something needs attention.
How should schools respond?
The fault should be investigated rather than simply resetting the indicator.
Where the system is monitored centrally or uses automatic testing, the fault information may help identify the affected fitting and reduce the time required to diagnose the problem.
7. Emergency Lights Fail the Full Duration Test
An emergency light may illuminate correctly during a short functional test but fail when required to operate for its full rated duration.
This is one of the reasons why schools cannot rely solely on short visual checks.
The full-duration test puts considerably more demand on the battery and can expose deterioration that would otherwise remain hidden.
Government guidance states that emergency lighting systems should undergo an annual full discharge test, while school guidance also highlights more detailed condition testing. GOV.UK
Common causes include:
- Ageing batteries
- Incorrect replacement batteries
- Faulty charging circuits
- Poor connections
- Defective luminaires
- Batteries that have not been properly maintained
If a fitting fails its duration test, the cause needs to be identified and the defect corrected.
8. Emergency Lighting Has Not Been Tested Regularly
Sometimes the problem is not a faulty fitting at all. The issue is that the system has not been tested consistently.
Emergency lighting is easy to overlook because it may only be needed during an emergency or power failure.
However, regular testing is essential.
Government guidance for schools encourages a monthly flash test to be undertaken and recorded. It also recommends a more detailed condition test every six months, including a three-hour battery test, carried out by a competent person. GOV.UK
More general fire safety guidance recommends monthly functional testing and annual testing by a competent contractor. GOV.UK
Why records matter
Testing should not simply be carried out and forgotten.
Records provide evidence of what was checked, when it was checked and whether faults were identified.
A suitable emergency lighting log should help the school keep track of:
| Information | Why it matters |
|---|---|
| Date of test | Shows when the inspection took place |
| Areas checked | Confirms coverage |
| Faults identified | Creates a clear maintenance trail |
| Remedial action | Shows how defects were addressed |
| Test results | Demonstrates system performance |
| Contractor details | Identifies who completed specialist work |
| Follow-up requirements | Prevents outstanding faults being forgotten |
9. Emergency Lighting Is Obstructed
Even a perfectly functioning emergency light can be ineffective if something blocks the illumination.
Schools are constantly changing. Furniture is moved, displays are installed, storage areas are reorganised and classrooms are adapted for different activities.
A fitting that originally provided good illumination may become partially obstructed.
Common examples include:
- Tall storage units
- Display boards
- Temporary partitions
- Equipment
- Decorations
- Suspended objects
- New signs
Emergency lighting should be positioned and maintained so that it can perform its intended function.
If the building layout changes substantially, the emergency lighting design may also need to be reviewed.
10. Emergency Lighting Has Been Damaged
Schools are high-traffic environments, and emergency lights can be vulnerable to accidental damage.
A fitting may be struck by a ball in a sports hall, hit by equipment in a corridor or damaged during building work.
Even apparently minor cracks or damage should be investigated.
A damaged diffuser or housing may affect the performance and protection of the fitting. Loose fittings can also present additional electrical or physical safety concerns.
What should schools do?
Damaged emergency lighting should be reported and inspected.
Where necessary, the fitting should be repaired or replaced.
It is particularly important to check emergency lighting following refurbishment, electrical work or other building projects.
11. Old Emergency Lighting Systems Are Becoming Unreliable
Older emergency lighting systems can become increasingly difficult and expensive to maintain.
Replacement components may be harder to source, while older lamps, batteries and electronic components may have reached the end of their useful service life.
Schools may therefore find that the same fittings require repeated repairs.
In some cases, replacing outdated fittings with modern emergency LED luminaires can provide a more reliable solution.
The Department for Education’s technical guidance for school buildings specifies emergency lighting requirements and recognises systems using manual key switches, self-testing luminaires and centralised testing and monitoring arrangements. GOV.UK
An upgrade can also make ongoing maintenance easier where a school has a large number of emergency fittings.
12. Emergency Lighting Does Not Match Changes to the Building
School buildings rarely stay exactly the same.
Classrooms may be combined, corridors altered, new partitions installed or areas converted for different uses.
When this happens, the emergency lighting system needs to remain appropriate for the building.
For example, removing a partition could create a larger open area that needs different emergency lighting coverage. Installing a new partition could also create a route or area that was not part of the original arrangement.
Why this matters
Emergency lighting should be considered as part of wider fire safety arrangements rather than treated as an isolated electrical system.
The Department for Education’s technical guidance states that emergency lighting design should be based on building-specific risks and meet relevant emergency lighting standards. GOV.UK
If significant alterations have been made to a school, it is sensible to have the existing emergency lighting installation reviewed.
What Should Schools Do When an Emergency Lighting Fault Is Found?
A fault should be dealt with promptly rather than simply being written into a maintenance log and forgotten.
The appropriate response depends on the seriousness of the defect.
For example, a damaged emergency light covering a critical escape route may require immediate attention, whereas a minor issue in another area may be managed through planned remedial work.
A sensible process is:
- Identify the affected fitting
- Record the fault
- Assess its potential impact
- Arrange inspection or repair
- Complete the necessary remedial work
- Retest the fitting
- Record the result
This creates a clear chain from fault identification through to resolution.
How Often Should School Emergency Lighting Be Tested?
Testing frequencies can depend on the installation, risk assessment and applicable standards, so schools should follow the requirements for their particular system.
As a general guide, government school guidance recommends monthly flash testing and a more detailed condition test every six months, including a three-hour battery test by a competent person. GOV.UK
Other government fire safety guidance describes monthly functional tests and annual full-duration testing. GOV.UK
| Test or inspection | Typical purpose |
|---|---|
| Routine visual checks | Identify obvious faults or warning indicators |
| Monthly functional test | Confirm emergency fittings operate |
| Periodic condition testing | Check the wider condition of the installation |
| Full-duration test | Confirm batteries can provide the required duration |
| Professional inspection | Identify technical faults and compliance issues |
The school’s fire risk assessment, system documentation and relevant standards should be used to determine the appropriate testing regime.
When Should a School Call a Professional?
Routine checks are important, but school staff should not be expected to diagnose complex electrical faults.
A competent professional should be involved where there is:
- Repeated emergency lighting failure
- Battery failure
- Electrical faults
- Damaged wiring
- Persistent fault indicators
- Failed duration testing
- Problems affecting multiple fittings
- Changes to the building layout
- An ageing or obsolete system
- Uncertainty about compliance
- A need for system upgrades
Government guidance recommends that emergency lighting installation and modification work is carried out by a competent person and that systems are properly tested and maintained. GOV.UK
Preventing Emergency Lighting Problems in Schools
The best approach to emergency lighting is preventative rather than reactive.
Waiting until a fitting fails during an actual power cut is clearly not an effective maintenance strategy.
Schools can reduce problems by keeping a consistent maintenance programme in place.
This should include:
- Regular visual checks
- Monthly functional testing
- Appropriate periodic inspections
- Full-duration testing
- Accurate test records
- Prompt investigation of faults
- Battery replacement when necessary
- Replacement of damaged fittings
- Review following building alterations
- Professional inspection where technical problems arise
It is also worth making sure that the person responsible for fire safety understands where the emergency lighting test points are located and how the school’s particular system is tested.
Emergency Lighting Maintenance Should Be Part of the School’s Wider Fire Safety Strategy
Emergency lighting should not be considered in isolation.
It works alongside other important fire safety measures, including fire alarms, fire doors, escape routes, signage and evacuation procedures.
A school could have an excellent emergency lighting system, but if escape routes are blocked or fire doors are poorly maintained, the overall evacuation strategy can still be compromised.
Likewise, emergency lighting that has not been tested or maintained may fail when it is most needed.
Regular inspections and accurate records therefore form an important part of keeping the whole fire safety strategy working effectively.
For schools, reliable emergency lighting is ultimately about providing staff, pupils and visitors with clear visibility when normal lighting is unavailable. Identifying common faults early, maintaining batteries and fittings, and keeping proper testing records can make a significant difference to the reliability of the system when an emergency occurs.