Car Park Lighting Requirements in the UK: Lux Levels, Uniformity and Choosing the Fittings

Car parks are unforgiving places to light. They are used at all hours, often by people alone and on foot, watched by CCTV, hit by vehicles, and in the case of surface car parks, visible to every house across the road. The regulations reflect that: a compliant car park lighting scheme has to satisfy light-level standards, personal-safety expectations, emergency lighting law and, outdoors, planning conditions on light spill. Here is what each requires and how it translates into fittings.

Covered and multi-storey car parks: BS EN 12464-1

Indoor and multi-storey car parks are treated as indoor workplaces under BS EN 12464-1. The maintained illuminance values are 75 lux in parking bays and on traffic lanes, and 300 lux on entrance and exit ramps during the day, falling to 75 lux at night, so that drivers' eyes can adapt between daylight and the interior. Uniformity — the ratio of minimum to average illuminance — should be at least 0.4, and in practice a good scheme aims higher, because dark corners are exactly where people feel unsafe. The standard also asks for light on vertical surfaces: faces need to be recognisable at a distance for CCTV and personal security, which means avoiding fittings that throw everything straight down and leave walls and people in shadow.

Surface car parks: BS EN 12464-2 and BS 5489

Open-air car parks fall under BS EN 12464-2 (outdoor workplaces), with maintained illuminance of 5 lux for light traffic, 10 lux for medium and 20 lux for heavy traffic such as retail and hospital car parks, uniformity of at least 0.25, and glare-rating limits on the luminaires. BS 5489-1:2020, the UK code of practice for road and public amenity lighting, covers car parks as amenity areas and is the document most local authorities and consultants design to. It also points to the Institution of Lighting Professionals' guidance on obtrusive light, which sets the limits on spill, upward light and glare beyond the boundary that planning conditions are usually written from.

Colour rendering and CCTV

BS EN 12464 sets a minimum colour rendering of Ra 20 for outdoor car parks and Ra 40 indoors, but those are floors, not targets. Where CCTV is expected to identify people or vehicle colours — which is every car park — Ra 70 or better white light is the sensible specification, and it is what LED delivers as standard. Colour temperature of 3000 K to 4000 K gives good recognition without the harshness and sky glow of cooler light; our article on outdoor lighting and light spill explains why warmer is now preferred outside.

Emergency lighting and escape

Covered car parks are non-domestic premises under the Fire Safety Order, so escape routes, stairs, exits and fire equipment need emergency lighting to BS 5266-1: 1 lux along escape routes, 0.5 lux over open areas, normally three-hour duration, and a monthly and annual test regime. Most LED battens and bulkheads are available with an integral emergency pack, which is far easier to design in than to add later.

Choosing the fittings

• Multi-storey and underground: IP65, IK10 LED bulkheads or linear battens with polycarbonate diffusers, surface-mounted on the soffit or walls. Ceiling heights are low, so wide, even distributions matter more than lumen output.
• Sensors and corridor function: microwave sensors suit car parks because they see round pillars and down ramps. Dim to a low background level — 10 to 20 percent — on vacancy rather than switching off, so the space never goes black and CCTV keeps an image.
• Surface car parks: column-mounted street and area lights with flat glass and asymmetric optics at zero tilt, 5 to 8 m columns, placed at the perimeter facing inward so the light stays on the site. Flood lights belong on building faces and loading yards, not aimed across the car park.
• Dimming schedule: full output during trading or shift hours, reduced after the planning curfew, and presence-triggered where the site is quiet overnight. This is what makes the obtrusive-light limits achievable.
• Robustness: IK10 and vehicle-height mounting in traffic lanes; surge protection on every outdoor fitting; corrosion-resistant finishes near the coast.
• Wayfinding: colour-coded level lighting, brighter cores at lifts and stairs, and step lights or wall lights at pedestrian routes do more for how safe a car park feels than raising the average lux ever will.

A car park is compliant at 75 lux. It feels safe when the walls are lit, the corners are even and nothing goes dark when the sensors time out.

None of this needs exotic equipment; it needs the right fittings in the right places with a control schedule that matches how the car park is used. Regents LED supplies the transport and car park sector with IP65 battens, bulkheads, area lights and floods, and our engineers will produce a lux calculation for a specific structure or site — including the spill figures a planning condition asks for — as part of any enquiry.