When the Lights Go Out, Your Fire Safety Signs Shouldn't

A power cut changes a familiar workplace in seconds. Corridors lose their landmarks, stairwells become difficult to judge and a standard printed fire exit sign can disappear into the dark. When the lights go out, your fire safety signs shouldn't. Clear escape-route and fire equipment signs must remain easy to find when people need them most.

For facilities managers, responsible persons and site managers, this is not simply a question of fitting brighter signs. It is about choosing the right sign material, positioning it properly and making sure it works alongside emergency lighting and the rest of the fire safety plan.

Why visibility after a power failure matters

During an evacuation, people do not always leave by the route they use every day. Smoke, alarm noise, reduced visibility and unfamiliar visitors can all make a straightforward route feel confusing. Fire exit signs direct occupants towards a place of safety, while fire action signs, extinguisher location signs and fire door notices support the wider response.

Electrical lighting may fail because of a local fault, a wider outage or damage caused by an incident. Emergency lighting is designed to provide a back-up, but its coverage and duration depend on the system installed and maintained at the premises. Signs that continue to be visible independently give occupants another useful visual reference point.

This is especially relevant in warehouses, workshops, schools, care settings, hospitality venues, construction compounds and large office buildings. Long routes, changes in level and areas with no natural light can all make a blackout more difficult to manage.

When the lights go out, choose signs that stay visible

Photoluminescent fire safety signs absorb energy from normal lighting, then emit a visible glow when the surrounding light level falls. Often called glow-in-the-dark signs, they are a practical choice for marking fire exits, directional arrows, refuge points, extinguishers, fire alarm call points and fire equipment.

The material needs exposure to suitable ambient light before it can perform as intended. That means a sign placed in a permanently dim stockroom, behind a tall racking run or in a shaded recess may not receive enough charge. Photoluminescent signage is effective, but it is not magic. Site conditions matter.

For many workplaces, the strongest approach is to combine photoluminescent signs with maintained or non-maintained emergency lighting. The lighting helps illuminate the escape route, while the sign continues to provide a recognisable directional message should normal lighting fail. Neither should be treated as a substitute for the other where the fire risk assessment identifies a need for both.

Match the sign to its purpose

A fire exit sign identifies an exit or the direction of travel towards one. It should use a recognised running-man pictogram and directional arrow where required, rather than relying on text alone. A directional sign needs to be positioned so that the next decision point is clear, including junctions, staircases, changes of direction and final exits.

Fire equipment signs have a different job. They help people identify the location of extinguishers, fire blankets, hose reels and alarm call points. In an emergency, a sign should confirm what is available without causing delay or uncertainty. Mounting an extinguisher sign directly above, or immediately beside, the equipment makes it easier to locate from a distance.

Fire door signs should not be overlooked. Messages such as “Fire door keep shut”, “Fire door keep locked” or “Automatic fire door keep clear” support the building’s compartmentation measures. They may not be escape-route markers, but they remain part of a well-managed fire safety sign system.

Start with the escape route, not the catalogue

A broad range of signs makes buying easier, but choosing the right products begins with a walk-through of the site. Follow each escape route as a visitor would. Look for every point at which someone must decide where to go, and check whether the route remains obvious in low light.

Pay particular attention to areas where signs can be blocked by open doors, seasonal displays, pallet storage, temporary hoarding or new equipment. In industrial premises, racking layouts change. In schools and offices, furniture moves. On construction sites, routes can be altered frequently. A compliant sign hidden from view does not give much practical help.

Consider viewing distance too. A small sign may be suitable above a nearby door but inadequate at the far end of a warehouse aisle. Larger-format fire exit signage, repeated directional signs and signs fixed perpendicular to the wall can improve visibility where occupants approach from different directions.

Ceiling-mounted and projecting signs can be useful in wide corridors, reception areas and open-plan spaces. They are less likely to be obscured by people, furniture or door swings. However, installation must suit the surface, ceiling height and the sign’s viewing angle. There is no value in fitting a projecting sign so high that the pictogram cannot be read.

Check the material, finish and environment

Sign material should be selected for the location rather than the lowest initial price alone. Self-adhesive photoluminescent signs are quick to fit on clean, smooth internal surfaces. Rigid plastic signs offer a more substantial finish and can be fixed to walls, doors and other appropriate surfaces. For demanding environments, consider whether moisture, cleaning chemicals, dust, impact or temperature changes will affect the sign and its fixing method.

A kitchen, washroom, factory floor and external muster area will not have the same requirements. External fire assembly point signs, for example, need a weather-suitable material and a location that remains clear throughout the year. Internal signs may need to withstand regular cleaning, particularly in public buildings, food premises and healthcare settings.

Where a message needs to identify a site-specific route, door or procedure, a custom sign can be the better solution. This is useful for large estates, multi-occupancy buildings, temporary sites and premises with unusual layouts. Custom wording should support, not replace, recognised fire safety symbols where a standard pictogram is expected.

Compliance is more than buying the right symbol

UK fire safety arrangements are based on the premises, the people using it and the findings of the fire risk assessment. The responsible person should ensure that escape routes and fire-fighting equipment are appropriately marked and that occupants can understand the information provided.

For fire exit signage, recognised safety sign designs and pictograms are the sensible starting point. Mixing old-style text-only signs with newer pictogram signage can create inconsistent messages, particularly in larger buildings. A planned replacement programme can be more practical than changing signs one at a time without considering the full route.

It also pays to check signs during routine fire safety inspections. Include them when testing emergency lighting, checking extinguishers and reviewing fire doors. Look for faded surfaces, damaged corners, loose fixings, changed routes and signs that are no longer visible because of stock or refurbishment work.

A simple low-light check

Do not wait for a real power failure to find a problem. Once photoluminescent signs have had normal exposure to light, inspect the route in reduced lighting conditions where it is safe to do so. This can reveal poor charging, awkward placement or unexpected obstructions.

Record the findings and act on gaps promptly. The answer may be a larger sign, a repeat sign, improved local lighting, a revised route marker or the removal of an obstruction. It depends on the building and its fire strategy, which is why a site check is more valuable than a blanket purchase.

Order by sign category to avoid missed details

When replacing or upgrading signage, separate the order into clear groups: fire exit and directional signs, fire action notices, fire door signs, fire equipment signs, assembly point signs and any required custom messages. This makes it easier to compare what is installed against what the site actually needs.

The Sign Shed supplies photoluminescent fire safety signage alongside standard safety signs, site boards and custom options, making it straightforward to source matching formats for a single site or a wider property portfolio. Ordering in one planned batch can also help maintain consistent sign design, material and mounting style across the premises.

A sign is a small item, but it carries a serious instruction. Make it visible in normal conditions, make it clear on the escape route and make sure it still earns its place when the building suddenly goes dark.