Only a minor share of the cost of an emergency lighting system is incurred when the luminaires are bought. Over the service life, installation effort, testing and documentation, battery replacement and repairs carry most of the weight. When comparing quotes, look at the total cost over roughly ten years rather than the unit price.
What makes up the cost of emergency lighting?
The total cost of ownership (TCO) of an emergency lighting system is the sum of all costs from design to the end of its service life. It falls into three blocks:
- Acquisition: luminaires, exit signs, batteries or a central battery system, mounting material.
- Installation: design, cabling, mounting, commissioning, initial documentation.
- Operation: testing, logbook, battery replacement, repairs, energy and the risk of a non-functioning system.
Flat prices per luminaire or per square metre say little, because the number and type of luminaires only follow from a lighting design to EN 1838 and the requirements that apply to the building. Which requirements apply is covered in When is emergency lighting required?.
What drives acquisition costs?
Luminaire type and quantity
Exit sign luminaires, escape route luminaires, open-area (anti-panic) luminaires and high-bay solutions differ considerably in design and light output. The quantity depends on the floor plan, ceiling height, viewing distances of the signs and the required illuminance. A luminaire with higher luminous flux and suitable optics can replace several weaker ones, which lowers not only the purchase price but also the later testing and maintenance effort.
Self-test or manual testing
A self-testing emergency luminaire is a luminaire that runs function and duration tests automatically in line with EN 62034 and stores the results. It usually costs somewhat more to buy than a luminaire without automatic testing, but saves working time at every test. See Self-testing emergency lights.
Battery chemistry
The battery largely determines when the next expense is due. NiCd and NiMH batteries typically need replacing more often than lithium iron phosphate (LiFePO4) batteries, which are regarded as long-lasting and temperature-stable. More in Emergency light batteries.
What drives installation costs?
Self-contained or central battery
The choice of system is the biggest lever for installation:
- Self-contained system: each luminaire has its own battery and is fed from the normal supply. No battery room, no fire-resistant cabling, easy to retrofit.
- Central battery system: one central unit supplies all luminaires. It usually requires a dedicated battery room, separate circuits and cables with circuit integrity, but offers central monitoring.
Which system is more economical depends on building size, number of luminaires and existing installations. A detailed comparison is available in Self-contained vs central battery.
Building and existing installation
Cost drivers include high ceilings (mobile elevating work platforms, scaffolding), work during operating hours, listed buildings or fire-sensitive areas, and missing as-built drawings. In halls with LED high-bay luminaires, an emergency driver can turn an existing luminaire into an emergency luminaire instead of adding new fittings.
What ongoing costs should you expect?
Ongoing costs are the ones most often underestimated at the investment stage:
- Testing: EN 50172 provides for a monthly function test and an annual full rated duration test; for central systems, daily visual checks of the indicators are common. National rules, such as DIN VDE V 0108-100-1 in Germany, add detail. See Testing intervals.
- Documentation: every test belongs in the logbook. Gaps become visible at the latest when an authority or inspector visits.
- Battery replacement: batteries age even when unused. Replacement means material, labour and often access equipment.
- Repairs: faulty luminaires, damaged signs, adjustments after refurbishments.
- Downtime risk: a system that is not operational or not documented can lead to findings during fire safety inspections, enforcement requirements or, after an incident, problems with insurance and liability.
What does a 10-year cost view look like?
The table compares qualitatively where effort arises over ten years for typical system variants. It does not replace a calculation for your building.
| Cost block | Self-contained without self-test | Self-contained with self-test and digital logbook | Central battery |
|---|---|---|---|
| Luminaire purchase | low to medium | medium | low to medium per luminaire, plus central unit |
| Installation | low to medium | low to medium | high (battery room, circuit integrity, separate circuits) |
| Monthly function test | high (visit every luminaire) | low (automatic, checked via app) | low to medium (triggered centrally) |
| Annual duration test | high | low (automatic) | low to medium |
| Documentation | high, error-prone | low, generated automatically | medium, depending on monitoring |
| Battery replacement | several times depending on chemistry, spread across all luminaires | depending on chemistry, less often with LiFePO4 | central, but large-volume |
| Risk of missed tests | high | low | low to medium |
Practical tip: When requesting quotes, ask not only for the price per luminaire but also for battery chemistry, warranty, self-test function, test report export and planned battery replacement. Only then can quotes be compared. Where you can save without compromising compliance is explained on affordable, compliant emergency lighting.
How do self-testing and a digital logbook reduce effort?
A worked example shows the scale: with 120 luminaires and signs, monthly function tests add up to 1,440 individual checks a year, plus 120 annual duration tests, a total of 1,560 test operations that someone has to carry out and record. Luminaires mounted high up add access equipment to the bill.
Self-testing luminaires run these tests automatically. A digital logbook is an electronic record in which the test results of each luminaire are stored and exported as a report. The monthly walk-round becomes a review of results, and faults show up immediately instead of at the next inspection. What a complete logbook contains is explained in Emergency lighting logbook.
There is one limit: visual checks for damaged luminaires, obstructed signs or escape routes changed by refurbishment remain the operator's responsibility.
Why is there an on-site survey before the quote?
Without a site visit, the main cost drivers cannot be assessed reliably: ceiling heights, escape route layout, existing cables and luminaires, condition of an existing system, access and operating hours. NOTLUX therefore carries out an on-site survey before every quote. Follow-up costs are part of the planning: batteries are wear parts and last at least five years in NOTLUX luminaires. The maintenance contract makes follow-up costs predictable: the annual inspection, replacement of all batteries in year 5 to 6 and repairs are included.
Frequently asked questions
How much does emergency lighting cost per luminaire?
No reliable flat price can be given, because luminaire type, light output, battery technology, self-test function and installation effort vary widely. Ongoing costs for testing, documentation and battery replacement come on top. Only a quote based on a lighting design and site survey is meaningful.
Is a central battery system cheaper than self-contained luminaires?
It depends on the building. Central battery systems usually need a battery room and cables with circuit integrity, which makes installation more expensive, but they offer central monitoring. Self-contained systems are often economical, especially in existing buildings and small to medium-sized properties.
Are self-testing emergency lights worth it?
In most buildings, yes, because the monthly function test and the annual duration test run automatically and the report is created at the same time. The higher purchase price is offset by saved working time and a lower risk of missed tests.
How often does an emergency light battery need replacing?
That depends on the battery chemistry, ambient temperatures and the manufacturer's specifications. At the latest when the annual duration test shows that the required time is no longer reached, replacement is due. LiFePO4 batteries are regarded as particularly long-lasting.
Which emergency lighting costs are most often overlooked?
The most underestimated items are testing and documentation effort over the years, access equipment for luminaires mounted high up, and battery replacement. Adjustments after refurbishments, such as additional exit signs, are also often missing from the budget.
Emergency lighting without worries.
Luminaires, installation and maintenance from a single source – every inspection documented digitally in our app. We start with a free on-site survey and standard-compliant design.