Industrial sites are lit for hazards, not comfort
Industrial lux testing is about seeing hazards in time: a forklift at a blind corner, an edge on a loading platform, a valve label in a plant room, a pothole in a yard at 6am in January. Industrial premises such as vehicle maintenance depots, waste and recycling facilities, utility plant, engineering workshops, builders' merchants and trade counters combine indoor and outdoor work, high-level fittings that are hard to maintain, and dust or moisture that degrades output quickly. A measured survey shows where light has fallen below what the work needs.
Regulation 8 of the Workplace (Health, Safety and Welfare) Regulations 1992 applies to all of it, and HSE guidance HSG38 Lighting at work sets minimum averages and minimum measured values by task. HSG38 is useful on industrial sites because it covers movement and hazard visibility as well as detailed work. BS EN 12464-1:2021 covers indoor tasks and BS EN 12464-2:2024 covers outdoor work places.
Industrial areas and the values that apply
| Area | Standard | Em (lux) |
|---|---|---|
| Plant rooms, switchgear rooms | BS EN 12464-1:2021 | 200 |
| General machine work, welding | BS EN 12464-1:2021 | 300 |
| Precision machining, grinding | BS EN 12464-1:2021 | 500 |
| Loading ramps and bays | BS EN 12464-1:2021 | 150 |
| Stores and stockrooms | BS EN 12464-1:2021 | 100 |
| Circulation corridors | BS EN 12464-1:2021 | 100 |
| External yards, storage and loading areas | BS EN 12464-2:2024 | Varies by activity |
Outdoor values under BS EN 12464-2:2024 depend on the activity, from low levels for walkways and storage areas to higher levels for continuous loading and handling. We confirm the applicable value for each external zone in the report rather than apply a single figure across the yard.
Typical industrial survey scope
- Workshops and maintenance bays, including vehicle pits, where under-vehicle inspection needs local task lighting.
- Plant rooms, boiler houses, switch rooms and pump stations, where operators must read gauges and labels.
- High-bay halls with cranes or gantries that cast moving shadows.
- Trade counters and builders' merchant yards where customers and vehicles share space.
- External yards, fuel points, weighbridges and gatehouses, surveyed after dark.
- Stairs, platforms, ladders and access walkways at height.
- Escape routes, with optional emergency lighting lux readings on the same visit.
Who asks for industrial lux testing
Requests usually come from H&S managers and SHEQ teams, from insurers' risk engineers who want evidence that night-time yard work is controlled, from principal contractors and facilities providers responsible for client sites, and from landlords of industrial estates who light shared roads and service yards. HSE and local authority inspectors may ask how adequacy was judged after an incident. Our HSE lighting requirements guide covers what inspectors look for.
How we carry out the survey
- We agree scope, access, induction and any permit or isolation requirements in advance.
- Indoor areas are measured at the relevant working height or floor level with a calibrated lux meter.
- External areas are measured after dark on a grid suited to the space, with vehicle movements managed by your team.
- We record fitting condition, failed lamps, dirt and corrosion, ingress damage and control faults such as photocells or timers out of step with shift patterns.
What you receive
- Zone-by-zone results indoors and out, with the applicable value and a pass, marginal or fail flag.
- Average, minimum and uniformity values, with plans or sketches marking reading points.
- Remedial priorities ranked by risk, with practical actions such as cleaning, relamping, re-aiming floodlights or adding local task lighting.
- A summary page for insurers, clients or landlords.
Report turnaround is confirmed when you book.
Industrial lux testing across London and the South East
We cover industrial estates, depots and plant across London, Hertfordshire, Essex, Kent, Surrey, Berkshire, Buckinghamshire, Bedfordshire, Cambridgeshire, Suffolk and Norfolk. For manufacturing floors see our factory lighting survey, and for racking and distribution see warehouse lux testing.
Price
Industrial lux surveys start from £320. External areas, multiple buildings or night-only access may increase the price, and multi-site work is priced on application. Every price is confirmed before booking.
Book industrial lux testing
Tell us the site, the buildings and yards in scope and your access constraints, and we will propose a survey plan and price. Book your industrial survey.
Frequently asked questions
Which standard applies to outdoor industrial yards?
External work areas are covered by BS EN 12464-2:2024, which sets values by activity, alongside the general duty in regulation 8 of the Workplace (Health, Safety and Welfare) Regulations 1992.
Do you survey yards and external areas at night?
Yes. External lux readings are only meaningful after dark, so we schedule yard and gatehouse measurements for the evening or early morning.
Can you measure plant rooms and switch rooms?
Yes. BS EN 12464-1:2021 recommends 200 lux for plant and switchgear rooms, and we also check that gauges, labels and panels are readable.
Can emergency lighting be tested on the same visit?
Yes. We can add emergency escape lighting lux readings to an industrial survey, which is usually cheaper than a separate visit.