What is Emergency Lighting and How Does it Work?
Emergency lighting is a safety system that provides illumination when the main power supply fails. It helps people find their way out of a building safely during emergencies such as fires or power cuts. UK law requires all occupied buildings to have emergency lighting installed and maintained to ensure safe evacuation. This requirement falls under the Fire Precautions (Workplace) Regulations 1997 and BS 5266-1, which set out how emergency lighting should be used in commercial buildings and residential blocks and HMO’s.
Why Emergency Lighting is Required
In an emergency, a loss of power can leave a building in complete darkness. Without a backup system, people may struggle to find exits, leading to panic and delays in evacuation. Emergency lighting provides enough visibility to guide people safely out of the building. It is particularly important in workplaces, public buildings, apartment blocks, and any location where people gather.
Where Emergency Lighting is Needed
Different areas of a building require emergency lighting for specific reasons. UK regulations outline where these lights should be placed to ensure safe evacuation.
Escape Routes
All escape routes must have emergency lighting to show the way to exits. If the route is a corridor, it must be kept clear of obstacles so people can move quickly and safely. Exit signs should also be illuminated to make them easy to see in low-light conditions.
Stairwells
Stairwells are high-risk areas during an evacuation, so they must have at least two emergency lights. This ensures that people can see each step clearly, reducing the chance of accidents.
Open Areas
Large open areas must have emergency lighting if they are bigger than 60 square metres. This helps people navigate towards escape routes. Smaller open areas may not need emergency lighting, but any exit doors must be illuminated to guide people out.
Pro Tip: Use LED Emergency Lights – LED lights last longer, consume less power, and provide better illumination compared to traditional lighting options.
Types of Emergency Lighting
There are different types of emergency lighting designed to work in various situations. The most common are maintained and non-maintained systems.
Maintained Emergency Lights
Maintained lights stay on at all times, just like normal lighting. If the power goes out, they continue to work but at a lower brightness. These are often used in theatres, cinemas, and other places where lights are dimmed regularly.
Non-Maintained Emergency Lights
Non-maintained lights are usually off and only turn on when the main power fails. They are powered by a battery system that keeps them running for at least three hours. These are commonly found in workplaces, schools, and office buildings.
Other Types of Emergency Lighting
- Combined Emergency Lighting – A single fitting that provides both normal and emergency lighting.
- Self-Contained Emergency Lights – Lights with built-in batteries that function independently.
- Central Battery Systems – A large battery supplies power to multiple emergency lights in a building.
- Satellite Emergency Lights – Smaller lights that work alongside a central battery system.
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Maintaining Emergency Lighting
Emergency lighting must be tested regularly to ensure it is in full working order. UK regulations require building owners to carry out monthly functional tests and a full annual test where the lights are run for their full battery duration. Any faults must be fixed immediately to keep the system compliant and effective.
Final Thoughts
Emergency lighting is not just a legal requirement. It is a lifesaving system that ensures people can evacuate safely in the event of a power failure. Whether in workplaces, public spaces, or residential buildings, having the right type of emergency lighting in the right places makes a huge difference in an emergency. Regular testing and maintenance ensure that when the lights are needed most, they will work as expected.
Pro Tip: Plan for Worst-Case Scenarios – Ensure your emergency lighting covers all critical areas, including lesser-used spaces like storage rooms and basements.
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