In practice

Emergency lighting: who is liable when the lights go out?

NOTLUX editorial team · TRiALED GmbH
In short

The operator is responsible for emergency lighting: the owner, employer, managing body or the appointed property manager. That still applies if a specialist installed the system or maintains it. If it is not tested and documented, the operator risks liability and trouble with insurers and authorities after an incident.

During a power cut, everyone must be able to leave the building safely. Emergency escape lighting and illuminated exit signs make that possible. Many operators assume that once a specialist has installed the system, the job is done. In fact, responsibility for day-to-day operation passes to the operator at handover.

Who is responsible?

The building operator is responsible: owner, employer, managing body or appointed property manager. The European basis is EN 50172 (testing and documentation) and EN 1838 (lighting levels). National law adds to this. In Germany, for example, duties come from the state building codes, the Workplace Ordinance (ArbStättV) and its technical rules, and DIN EN 50172 (VDE 0108-100):2024-10. Testing and maintenance can be outsourced, but responsibility for choosing, commissioning and checking the contractor stays with the operator.

What are your duties?

  • Keep it working: luminaires, exit signs and the power supply must work reliably in an emergency.
  • Test regularly: EN 50172 requires a monthly function test and an annual full-duration test. In Germany, the illuminance must also be measured every five years, and certain high-risk buildings need additional inspections by certified experts.
  • Document everything: every test and every defect belongs in the logbook, on paper or digital.
  • Adapt after changes: refurbishments, new room layouts or a change of use may require the system to be adapted.

What happens if something is missing?

If an accident happens and the system was not working, not tested or not documented, the operator can be held liable. Insurance problems, orders from the authorities and, in extreme cases, restrictions on use are also possible. The details are covered in operator duties and liability.

Quick self-check

  • Is there an up-to-date, complete logbook?
  • When was the last full-duration test?
  • Are all exit signs clearly visible from everywhere?
  • Has the building been refurbished or its use changed since installation?
  • Do you know how old your system's batteries are?

If you are unsure about any of these, it is worth taking a look at the system. The printable checklist helps on your first walk-through.

How NOTLUX can help

We survey your existing system on site free of charge, check it against current standards and show you clearly where action is needed and where it is not. If necessary, we upgrade or replace it and hand over clean documentation. With a maintenance contract, testing, battery replacement and the logbook stay covered from then on. Request a survey

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