LED emergency exit sign with running-man pictogram fitted by CJA Electrical

For Dartford property owners with shared common parts — HMOs, blocks of flats, mixed-use buildings — emergency lighting is part of the fire safety picture Dartford Borough Council expects to see in the licence file. CJA Electrical does the install, the annual full-discharge testing, and the remedial work when fittings reach end-of-life or fail BS 5266 duration tests.

What Emergency Lighting actually is

Emergency lighting is a battery-backed lighting system that switches on automatically when the mains supply fails. Its only job is keeping escape routes lit long enough for occupants to get out safely — not general illumination. For any premises where it’s required by law, a BS 5266 system is the documentation regulators expect to see. For most Dartford property where it applies — HMOs, blocks of flats, mixed-use buildings with shared corridors — the spec involves non-maintained LED bulkhead fittings at strategic points (stair heads, corridor junctions, exit doors), with a 3-hour battery duration matched to sleeping accommodation requirements.

When you need Emergency Lighting in Dartford

Where this lands for a typical Dartford property owner: - HMOs with shared common parts (hallways, stairs, landings) almost always need emergency lighting. Dartford Borough Council typically lists it as an HMO licence condition - Purpose-built blocks of flats with shared corridors, lobbies, or stairs need emergency lighting in those common parts - Converted houses to flats with shared escape routes — same as blocks of flats - Commercial and mixed-use premises in Dartford are covered by the Regulatory Reform (Fire Safety) Order 2005 - Single-occupancy houses generally don’t need emergency lighting If your fire risk assessment recommends emergency lighting, that’s the trigger to act on.

Multifunction tester measuring end-to-end resistance on a ring final circuit
Multifunction tester measuring end-to-end resistance on a ring final circuit

Standards and what compliance looks like

The detail BS 5266 cares about: every exit, every stair, every change of direction in a corridor, every corridor junction, every external escape route, and the immediate vicinity of any firefighting equipment (fire extinguishers, fire blankets) needs illumination from the emergency system. For a typical Dartford 3-storey converted house being run as an HMO, that translates to around 6 fittings — usually four LED bulkheads in corridors and on landings, plus a non-maintained exit sign at the final exit door, plus one fitting near any external escape route. Smaller properties need fewer; larger HMOs proportionally more.

Fittings and where they go

LED is the default. Older fluorescent emergency fittings still in service across Dartford buildings have shorter battery lives, higher failure rates, and warmer running temperatures. When we replace fluorescent on a like-for-like basis, the new LED units use a fraction of the standby power, charge faster, and have a meaningfully longer service life before end-of-life replacement. Specification details matter — duration rating, IP rating where fittings sit in damp areas, and the choice between addressable self-testing fittings (useful in larger buildings with central monitoring) versus stand-alone fittings (simpler, lower install cost).

Domestic consumer unit with CJA Electrical inspection sticker on completion
Domestic consumer unit with CJA Electrical inspection sticker on completion

Testing schedule and remedials

The testing regime is two-tier. Monthly function tests are quick — flip the test key, watch the LED illuminate on battery, restore. The duty owner does these themselves and logs them in the logbook on site. The annual test is the substantive one. Each fitting runs on battery for its full duration rating (3 hours for HMO and residential applications), and any fitting that fails to make it the distance gets flagged for battery or fitting replacement. We document the results in the logbook and issue a fresh BS 5266 certificate against the new test date.

Why Dartford property owners book CJA Electrical

What duty-holders typically want from an emergency lighting partner is someone who’ll actually maintain the system reliably year on year, not just install it once and disappear. We do annual visits on systems we’ve installed and on systems by other installers — same workflow, same documentation, same certificate format that Dartford Borough Council accepts. Plus the technical baseline: City & Guilds 2391 qualified inspector, ten years on Dartford domestic and small-commercial property, fully insured.

How the work runs

Project flow on a typical Dartford HMO conversion: Pre-quote site visit happens within a couple of working days of the initial call. The quote covers the BS 5266 specification, the fitting count, exit signage, and the certification deliverables. Once instructed, the install runs as a single visit for properties with fewer than ten fittings; two visits for larger blocks of flats. Commissioning, test, certificate, logbook — done by the end of the final visit.

What affects the price

Pricing is per property for installs, per visit for annual maintenance. The variables are fitting count, fitting type, duration rating, and access — typical Dartford HMO common parts run somewhere between four and ten fittings depending on building size. Quote responses are usually same-day on receipt of the FRA scope or a fitting count if you have one to hand.

FAQs

What’s the difference between maintained and non-maintained fittings?

Non-maintained fittings are off in normal use and switch on automatically when the mains fails — the standard answer for stairwells and corridors that are already lit by general lighting. Maintained fittings stay on continuously and run from battery during a power cut — used where the area needs continuous light. For most Dartford HMO and residential common-parts work, non-maintained 3-hour-rated fittings are the right spec.

How often does emergency lighting need testing?

Monthly function test (the duty owner does this) and an annual full-discharge test by a competent person. The annual test runs each fitting on battery for the full 3-hour duration to confirm it lasts the distance. CJA Electrical can do the annual test on systems we’ve installed and on systems installed by others — same workflow, same documentation.

Can you replace failed emergency lighting fittings in Dartford?

Yes. Failed fittings are usually a battery problem (typical 4-5 year life on older fluorescent units, 8-10 years on modern LED with sealed cells) or end-of-life on the fitting itself. We swap failed fittings on a like-for-like basis where the existing layout is sound, or rework the whole spec where a fire risk assessment has flagged gaps in coverage.

What documentation do you supply on completion?

BS 5266 certificate documenting the installation and the test results, plus a logbook for ongoing test records that stays at the property. The certificate is the document Dartford Borough Council fire risk assessors and insurers expect to see on inspection. Annual test visits update the logbook and issue a fresh dated certificate.

How long should emergency lights stay on after a power cut?

Depends on the duration rating and the application. 1-hour fittings are the minimum for premises with quick evacuation. 3-hour fittings are required for sleeping accommodation — HMOs, blocks of flats, hotels — because evacuation may be slower. We default to 3-hour LED for residential common-parts work in Dartford because the cost difference is minimal and the compliance posture is stronger.

Can you fit emergency lighting alongside a new fire alarm system?

Yes. The two systems are separate but related — fire alarm circuits and emergency lighting circuits typically share supply origins, so coordination matters. We do the emergency lighting side and can interface with whatever fire alarm contractor is doing the BS 5839-1 work. For HMOs in Dartford we often install the emergency lighting as part of the same licence-renewal scope as smoke alarm work — see the smoke alarm installation page for that side.

Will the inspection cause much disruption?

Minimal. The annual full-discharge test runs in the background — fittings switch to battery on the test key, then back to mains 3 hours later. We can schedule the test during a quiet period for the building (early morning, late evening, weekend) to minimise impact on tenants or occupiers. New installs need a single working day for typical Dartford HMO common parts.

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Frequently asked questions

What's the difference between maintained and non-maintained fittings?

Non-maintained fittings are off in normal use and switch on automatically when the mains fails — the standard answer for stairwells and corridors that are already lit by general lighting. Maintained fittings stay on continuously and run from battery during a power cut — used where the area needs continuous light. For most Dartford HMO and residential common-parts work, non-maintained 3-hour-rated fittings are the right spec.

How often does emergency lighting need testing?

Monthly function test (the duty owner does this) and an annual full-discharge test by a competent person. The annual test runs each fitting on battery for the full 3-hour duration to confirm it lasts the distance. CJA Electrical can do the annual test on systems we've installed and on systems installed by others — same workflow, same documentation.

Can you replace failed emergency lighting fittings in Dartford?

Yes. Failed fittings are usually a battery problem (typical 4-5 year life on older fluorescent units, 8-10 years on modern LED with sealed cells) or end-of-life on the fitting itself. We swap failed fittings on a like-for-like basis where the existing layout is sound, or rework the whole spec where a fire risk assessment has flagged gaps in coverage.

What documentation do you supply on completion?

BS 5266 certificate documenting the installation and the test results, plus a logbook for ongoing test records that stays at the property. The certificate is the document Dartford Borough Council fire risk assessors and insurers expect to see on inspection. Annual test visits update the logbook and issue a fresh dated certificate.

How long should emergency lights stay on after a power cut?

Depends on the duration rating and the application. 1-hour fittings are the minimum for premises with quick evacuation. 3-hour fittings are required for sleeping accommodation — HMOs, blocks of flats, hotels — because evacuation may be slower. We default to 3-hour LED for residential common-parts work in Dartford because the cost difference is minimal and the compliance posture is stronger.

Can you fit emergency lighting alongside a new fire alarm system?

Yes. The two systems are separate but related — fire alarm circuits and emergency lighting circuits typically share supply origins, so coordination matters. We do the emergency lighting side and can interface with whatever fire alarm contractor is doing the BS 5839-1 work. For HMOs in Dartford we often install the emergency lighting as part of the same licence-renewal scope as smoke alarm work — see the [smoke alarm installation page](/smoke-alarm-installation/) for that side.

Will the inspection cause much disruption?

Minimal. The annual full-discharge test runs in the background — fittings switch to battery on the test key, then back to mains 3 hours later. We can schedule the test during a quiet period for the building (early morning, late evening, weekend) to minimise impact on tenants or occupiers. New installs need a single working day for typical Dartford HMO common parts.

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