Emergency Lighting Guide: Requirements, Testing and Best Practice for Businesses

A reliable emergency lighting system is one of the most important life safety measures within any commercial or public building. In the event of a fire, power failure, or other emergency, emergency lighting helps people evacuate safely by illuminating escape routes, exits, stairwells, and key safety equipment.

This emergency lighting guide explains what emergency lighting is, why it matters, how systems work, how often systems should be tested, and what building owners, facilities teams, and responsible persons need to know about emergency lighting requirements.

Whether you manage a school, university, warehouse, factory, office, healthcare setting, or multi-site estate, understanding your emergency lighting responsibilities is essential.

What Is Emergency Lighting?

Emergency lighting is a backup lighting system that automatically activates when normal mains power fails. It is designed to provide enough illumination for occupants to leave the building safely and for essential fire safety procedures to be carried out.

Emergency lighting is commonly installed in:

• Escape routes and corridors
• Stairwells
• Final exits
• Open areas requiring safe movement
• Plant rooms and high-risk areas
• Areas without natural light
• Fire alarm call point locations
• Firefighting equipment points

In many buildings, emergency lighting is a legal requirement under UK fire safety legislation.

Why Are Emergency Lights Provided?

Emergency lights are provided to protect life during situations where normal lighting is lost. If a fire, electrical fault, or power outage occurs, occupants still need to move safely through the building.

Emergency lighting helps by:

• Illuminating escape routes
• Identifying final exits
• Reducing panic in dark environments
• Supporting evacuation of staff, pupils, visitors, or contractors
• Assisting emergency responders
• Helping responsible persons manage incidents safely

This is especially important in larger or more complex premises such as schools, universities, manufacturing facilities, warehouses, and multi-occupancy commercial buildings.

Emergency Lighting Requirements in the UK

Your emergency lighting requirements will depend on the type, size, and use of the building. In the UK, emergency lighting is typically governed by:

• Regulatory Reform (Fire Safety) Order 2005
• BS 5266 Emergency Lighting Code of Practice
• Findings from your Fire Risk Assessment

Generally, buildings should have suitable emergency lighting where occupants may be at risk if standard lighting fails.

This often includes:

• Corridors and escape routes
• Staircases
• Exit doors and final exits
• Open areas over a certain size
• Toilets without borrowed light
• Basement areas
• Plant rooms
• High-risk task areas

A professional assessment helps determine the correct level of protection for your premises.

How Do Emergency Lights Work?

Emergency lighting systems are connected to the mains power supply and include rechargeable battery backup units.

During normal operation:

• The mains powers the fitting
• Batteries remain charged

If power fails:

• The fitting automatically switches to battery power
• The emergency light activates immediately
• Illumination remains available for the rated duration

This automatic changeover ensures there is no delay when lighting is needed most.

How Long Should Emergency Lights Last?

Most emergency lighting systems are designed to operate for three hours during a power failure, although some systems may be rated for shorter durations depending on the building type and design.

Three-hour duration is common because it allows enough time for:

• Safe evacuation
• Reoccupation delays
• Emergency services access
• Extended incidents

Battery performance naturally degrades over time, which is why regular servicing and testing is important.

How Often Should Emergency Lights Be Tested?

Regular emergency lighting testing is essential to ensure systems work correctly in an emergency.

Typical testing schedules include:

Monthly Functional Test

A short test to confirm fittings illuminate when mains power is interrupted.

Annual Full Duration Test

A full rated discharge test, commonly three hours, to confirm batteries can sustain emergency operation.

Ongoing Visual Checks

Routine checks for damage, faults, indicator lights, or obstruction.

The correct schedule should reflect your building use and overall emergency lighting requirements.

How To Test Emergency Lighting

Emergency lighting should be tested methodically and recorded properly.

A typical monthly test involves:

• Simulating mains power failure
• Confirming fittings illuminate
• Checking signs remain visible
• Looking for failed lamps or battery faults
• Restoring power and confirming recharge indicators

Annual duration testing is more comprehensive and should be carefully planned so the building remains protected afterwards while batteries recharge.

Who Can Test Emergency Lighting?

Basic monthly checks are often carried out by a trained in-house responsible person, facilities manager, caretaker, or maintenance team.

However, annual servicing and more detailed testing should be completed by a competent fire safety professional or specialist contractor.
Using a qualified provider helps ensure:

• Accurate compliance records
• Correct fault diagnosis
• Safe battery discharge testing
• Identification of outdated fittings
• Alignment with UK standards

For many schools, industrial premises, and managed estates, outsourced support provides added confidence.

Emergency Lighting for Education, Manufacturing and Facilities Teams

Different sectors often face different challenges.

Education Settings

Schools, nurseries, colleges, and universities need clear evacuation routes for large numbers of occupants, including younger children and visitors unfamiliar with the building.

Manufacturing and Industrial Sites

Factories, warehouses, and engineering facilities may have larger footprints, limited daylight, machinery hazards, and more complex routes.

Facilities Management

Facilities teams often oversee multiple buildings and need consistent servicing, documentation, and dependable contractor support across portfolios.
While these sectors are a key focus, emergency lighting is equally important across offices, healthcare, hospitality, retail, and many other environments.

Common Emergency Lighting Issues Found in Buildings

During inspections, common problems often include:

• Failed batteries
• Missing test records
• Damaged fittings
• Inadequate coverage after layout changes
• Obstructed exit signage
• Poorly maintained luminaires
• Systems overdue for servicing

These issues can affect compliance and create unnecessary risk during an evacuation.

Why Professional Emergency Lighting Support Matters

A specialist provider can help with:

• Emergency lighting design
• New installations
• System upgrades
• Routine testing and maintenance
• Fault repairs
• Compliance reporting
• Advice following fire risk assessments

For businesses and organisations that want dependable support, working with an experienced contractor can simplify compliance and reduce risk.

Hoyles Fire & Safety supports clients across a wide range of sectors with professional emergency lighting installation, servicing, and maintenance.

Need Help With Emergency Lighting?

Whether you need a new installation, testing support, upgrades, or ongoing maintenance, Hoyles Fire & Safety can help. We support organisations across education, manufacturing, facilities management, and many other sectors with practical, compliant emergency lighting solutions.

Get in touch with our team today to discuss your emergency lighting requirements.