Lighting risks across a distribution centre
Large distribution sites concentrate people, vehicles and conveyors at high throughput, so lighting problems quickly become safety and accuracy problems. Typical issues include:
- Dock levellers and trailer interiors left in shadow, so operators enter trailers they cannot see into.
- Marshalling lanes where pallets are staged and forklifts and pedestrians mix in a partly lit open area.
- Mezzanine pick floors lit only from the roof, with the mezzanine deck blocking light to the floor below.
- Sortation and conveyor areas with shadowed walkways, crossover bridges and maintenance access.
- Yard and gatehouse lighting that leaves trailer parking and pedestrian routes poorly lit at night.
Standards and target values
Indoor zones are assessed against BS EN 12464-1:2021 and HSE guidance HSG38, under regulation 8 of the Workplace (Health, Safety and Welfare) Regulations 1992. External yards, service roads and open loading areas fall under BS EN 12464-2:2024, which sets lower values for outdoor handling but still requires uniform lighting across routes.
| Zone | Maintained illuminance (BS EN 12464-1:2021) |
|---|---|
| Loading ramps and bays | 150 lx |
| Manned rack aisles (floor level) | 150 lx |
| Store and stock areas | 100 lx |
| Dispatch, packing and handling areas | 300 lx |
| Control stations | 150 lx |
| Offices and transport planning rooms | 500 lx |
Mezzanine pick faces and sortation induction points involve reading labels and screens, so they generally need to be assessed as handling or packing tasks rather than storage. Our warehouse standards page sets out uniformity and glare limits alongside these values.
Who asks for lighting evidence
HSE
Distribution centres are enforced by HSE, which treats workplace transport as a priority. Lighting at docks, marshalling areas and yards is relevant whenever vehicle and pedestrian movements are investigated.
Clients, landlords and insurers
Retail and third-party logistics clients often audit site conditions, including lighting. Institutional landlords may require lighting performance at handover and at lease end, and it frequently appears in dilapidations claims. Insurers may request evidence at renewal or after an incident.
Fire risk assessors
Large open floors need open-area (anti-panic) emergency lighting of at least 0.5 lx under BS EN 1838:2024, as well as escape route lighting of at least 1 lx along the centre line. Assessors under the Regulatory Reform (Fire Safety) Order 2005 will look for test records.
What we measure on a distribution centre survey
- Dock face, leveller and trailer entry readings at a sample of doors, by day and with doors closed where possible.
- Grid readings across marshalling lanes, giving average and uniformity.
- Representative aisles of each racking type, with vertical readings at pick faces.
- Mezzanine decks and the floor area beneath them, including stairs and pallet gates.
- Sortation induction points, walkways and conveyor crossovers.
- External yard, trailer park, pedestrian routes and gatehouse to BS EN 12464-2:2024.
- Emergency escape and open-area lighting, where included in scope.
On large sites we agree a representative sampling plan in advance so the report is meaningful without measuring every square metre. Results are mapped to your zone or door numbers so actions can be assigned easily.
Energy projects and controls
Distribution centres are prime candidates for LED and smart-control projects. These save energy but can leave zones under-lit if dimming levels, sensor coverage or fitting spacing are wrong. A before-and-after survey protects both operator and landlord. See LED upgrades for what to check.
Peak season and temporary changes
Peak trading often brings temporary pick areas, extra marshalling lanes, agency staff unfamiliar with the site and additional night shifts. Temporary layouts are frequently set up in areas that were only lit for storage, so a quick check before peak begins is worthwhile. Agency workers new to the site are also less likely to report poor lighting, so do not rely on complaints to find problems. Our guide on whether poor lighting affects productivity covers the operational case for getting it right.
Book a distribution centre survey
We survey distribution sites along the M25, M11, M20 and A14 corridors across London and the South East. Indoor areas are covered by our warehouse lux survey, from £320, and yards by our car park and external lighting survey, from £250. Multi-site portfolios are priced on application. Book a survey and we will propose a sampling plan.
Frequently asked questions
What lux level is needed at a loading dock?
BS EN 12464-1:2021 recommends 150 lux maintained illuminance for loading ramps and bays, with a uniformity of at least 0.40. Trailer interiors often need additional dock lights to be seen into safely.
Do you measure outdoor yards as well?
Yes. Yards, trailer parks and pedestrian routes are assessed against BS EN 12464-2:2024 for outdoor workplaces, and can be combined with the indoor survey.
How do you survey a very large site?
We agree a representative sampling plan covering each zone type, dock group and racking layout, so the report reflects the whole site. Results are referenced to your own zone and door numbers.