Short answer: when normal site lighting fails after dark, security should stop and reassess the affected duties, keep people and vehicles away from routes that cannot be used safely, notify the agreed site contact and record what has changed. The officer may support access control and a controlled handover, but should not reset electrical equipment, improvise temporary wiring, certify emergency lighting or continue a patrol simply because it is normally required.
A lighting failure can turn a familiar commercial yard, warehouse, construction site or vacant building into a different working environment. Steps, uneven ground, moving vehicles, temporary barriers and signs may be harder to see. CCTV images may change, while doors, alarms or communication equipment could also be affected if the cause is a wider electrical fault.
The response should therefore be based on written site arrangements and the conditions actually observed. It should not depend on a lone officer making electrical or fire-safety decisions outside their competence.
Treat the failure as a change in site conditions
Security instructions often describe patrols, gates and checks as if the physical environment will remain constant. A loss of lighting means those instructions need to be reconsidered before the same activity continues.
The Health and Safety Executive says workplace roads, manoeuvring areas, yards and pedestrian areas should have suitable and sufficient lighting. Its workplace transport lighting guidance also highlights junctions, buildings, plant, pedestrian routes and areas where vehicles move. If the agreed lighting is unavailable, a normal route or vehicle movement should not automatically be treated as safe.
The site manager, facilities team or other responsible person should decide how the work is controlled and what repairs are required. Security can provide prompt observations, apply an authorised restriction and maintain a factual log.
Use a simple immediate-response sequence
- Stop at a safe point. Do not enter an unlit stairwell, plant area, excavation, loading zone or other route that cannot be assessed safely from the current position.
- Protect people from the changed area. Follow the agreed instruction for restricting access without blocking a fire exit or creating a new trip or traffic hazard.
- Notify the named contacts. Report when the failure was noticed, the area observed, whether people or vehicles are present and any other systems that appear affected. Use the backup contact if the primary contact does not respond.
- Escalate immediate danger. If there is fire, electrical arcing, smoke, injury or another threat to life, contact the emergency services and follow the site emergency plan. Do not delay an emergency call while waiting for routine authorisation.
- Record instructions and ownership. Note who accepted the report, what temporary restrictions were authorised, who is arranging technical attendance and when the position will be reviewed.
Avoid vague entries such as “lights out, manager informed”. A useful record states which area was observed, from where, at what time and which activity was paused or redirected. It should not publish sensitive access routes, perceived weak points or camera limitations.
Separate normal lighting from emergency lighting
Normal yard, task, corridor or security lighting and emergency escape lighting serve different purposes. Emergency lighting may provide enough illumination for escape without making a yard suitable for loading, a compound suitable for patrol or a work area suitable for normal activity.
HSE guidance for construction-site lighting says emergency routes should remain well lit while workers are present and that emergency lighting is needed where failure of the primary lighting would create a health or safety risk. GOV.UK also says workplace checks should confirm that emergency lighting is working and that faults are recorded.
Security can report whether designated lights appear to operate and whether an agreed escape route looks obstructed. The responsible person and competent fire-safety or electrical contractor must decide whether the emergency-lighting provision is compliant, whether occupation may continue and what testing or repair is required.
Do not continue a patrol by habit
A patrol route that was suitable in daylight or under normal floodlighting may not be suitable after a failure. The assignment instructions should allow an officer to pause an affected section, move to an agreed safe position and request direction without being treated as having missed a routine check.
The decision should be specific. One failed lamp near an unused boundary is different from a dark stairwell, an unlit vehicle crossing or the loss of most external lighting. Record which duty is affected and which duties can continue safely rather than closing or reopening the whole site by assumption.
A handheld torch can help a person see while moving to safety or carrying out an expressly approved task. It does not automatically replace fixed lighting, remove vehicle risk or make every patrol route usable. Torches should be suitable, available, maintained and included in the site plan rather than discovered as an improvised solution after the event.
Control vehicle movements and deliveries
Poor lighting can make pedestrians, barriers, edges, signs and reversing areas difficult to see. It can also create glare or deep shadows. HSE advises that lighting should suit the pedestrian and vehicle activity and that sudden changes between bright and dark areas can make it difficult for people and CCTV systems to adjust.
If a gate, yard or loading route is affected, security should use the agreed contact and traffic-management process. The officer should not wave a vehicle through because it has arrived on schedule, invent a new route or act as a banksman unless that separate role, training and authority have been established.
The site manager may suspend a movement, provide a safe alternative or arrange additional controlled lighting. Security can communicate the authorised decision to the driver, maintain access records and prevent an unconfirmed change from becoming normal practice.
Check the declared status of CCTV, alarms and access control
A lighting failure may alter CCTV image quality even when cameras remain powered. A wider electrical problem may also affect recording, door controllers, intercoms, alarms, charging points or network equipment. These possibilities should be checked by the people responsible for each system rather than inferred from one dark area.
Security should report observable symptoms: a monitor is blank, a door reader is not responding, an alarm panel displays a fault, or a camera view has changed. Avoid declaring that a system has failed unless its status has been confirmed. Do not circulate screenshots or descriptions that reveal coverage gaps.
Any temporary guarding, access or reporting measure needs an owner, start time and review point. A person authorised for the premises should confirm when the technical system is restored and when the temporary instruction can end.
Leave electrical diagnosis and repair to competent people
An officer should not open a distribution board, repeatedly reset a protective device, handle damaged cables, connect improvised lighting or assume a circuit is safe because it appears dead. HSE’s electrical safety guidance says installations should be maintained to prevent danger and repairs should be carried out by a competent person with the necessary skills, knowledge and experience.
The site plan should identify who may authorise electrical attendance, how an out-of-hours contractor is verified and which access restrictions remain while work is under way. Security may meet the authorised contractor, record entry and departure and explain the current exclusion area. The contractor or responsible site representative controls the technical work.
Temporary lights introduce their own questions about electrical supply, weather resistance, cables, glare, shadows, heat and obstruction. They should be selected and positioned through the site’s competent process, not assembled from whatever equipment happens to be available.
Keep the handover open until restoration is confirmed
“Engineer called” is not closure. The outgoing officer should tell the next shift which areas remain affected, what duties are paused, which temporary access arrangements apply, who owns the repair and when the next update is expected.
When lighting returns, record who confirmed the restoration and whether other systems or routes still require review. The officer should not remove restrictions merely because one lamp has come back on. Facilities, fire-safety and technical contacts may each need to confirm their part of the site.
If the failure recurs, preserve the earlier records and escalate it as a repeated defect. Do not normalise a dark route, bypass a safety device or allow a temporary arrangement to become permanent without review.
Questions to settle before the next dark shift
- Which lighting failures require a patrol, gate or vehicle movement to stop?
- Which routes have approved emergency lighting, and what is it intended to support?
- Who is the primary facilities contact, and who is the backup out of hours?
- Who can authorise temporary access changes or contractor attendance?
- What portable lighting is approved, where is it kept and who checks it?
- How should faults affecting CCTV, alarms or access control be reported?
- Who confirms that each restriction can be removed?
- What information must pass to the relief or next shift?
For a planned outage, use a separate written plan rather than relying on an incident response. Our guide to security during planned power shutdowns covers the advance briefing questions.
Discuss a suitable guarding arrangement
K9 Security Services welcomes enquiries about static guarding and agreed security duties for suitable commercial, construction, industrial and vacant sites. Requirements are considered individually by site, duties, shift pattern, access conditions and feasibility; availability must be confirmed for the proposed assignment.
To discuss a requirement, use the security quotation form and include the site postcode, proposed hours, intended duties, current lighting arrangements and the people responsible for facilities, fire safety and technical systems. This article is general operational guidance, not an electrical instruction, fire-risk assessment or site-specific safe system of work.
Featured image is illustrative and does not show a K9 Security Services employee, client property, lighting fault, recent incident or completed assignment.