LED versus legacy sources compared: car park and parking area lighting

Overview

The comparison between LED and discharge sources is settled on efficiency, but it remains useful to understand which differences really affect the operation of a car park and parking area lighting installation and which are marginal. Surface and multi-storey car parks run for long hours, which makes them prime candidates for energy retrofits.

Applicable standards

The regulatory reference for car park and parking area lighting is not a single document but a coordinated set of standards covering performance, safety and environmental impact. In design practice the following documents drive the main choices.

• EN 12464-2 — lighting of outdoor work places.
• EN 12464-1 — covered car parks treated as indoor spaces.
• EN 1838 — emergency escape lighting.

The criteria that matter

A serious technical comparison does not stop at consumption. The relevant differences concern distribution control, dimming capability, start-up behaviour, depreciation over time and maintainability. On each of these points LED behaves differently from discharge sources, with practical consequences for how the installation is designed and operated.

Operational differences

• Beam control — Limited by source size — High, dedicated optics per point
• Dimming — Limited, with restrike constraints — Continuous, no restrike constraints
• Start-up — Ignition and hot-restrike time — Instant
• Depreciation — Managed by periodic lamp replacement — Gradual, driven by thermal design
• Maintenance — Frequent lamp replacement — Rare interventions but on electronics

Design implications

Moving to LED changes maintenance logic: from frequent scheduled replacements to rare but more technical interventions, often on electronics. It also changes design logic, because dimmability allows the installation to be sized on differentiated scenarios instead of a single fixed level. In the overall balance these two aspects matter more than the instantaneous power saving.

Recurring critical points

The difficulties that most often emerge in car park and parking area lighting projects are not about product selection, but about defining requirements and verifying results.

• Covering wide surfaces with acceptable uniformity and few light points.
• Handling long low-occupancy periods without full switch-off.
• Integrating CCTV, which needs adequate vertical illuminance.

Design approach

An orderly method drastically reduces variations during works and disputes at commissioning. Three choices make the difference from the earliest stages.

• Asymmetric optics designed for manoeuvring aisle geometry.
• Zone control with presence sensors and a maintenance level.
• Coordination between the lighting design and camera requirements.

Parameters to verify

• Maintained illuminance — EN 12464-1/-2 — for manoeuvring and transit
• Uniformity — EN 12464 — requirement per task area
• Vertical illuminance — CCTV requirements — person and plate recognition
• Emergency lighting — EN 1838 — escape routes and exits

Most frequent mistakes

Non-conformities found at commissioning almost always come from three causes: requirements not declared or declared without a reference standard, calculation run on idealised geometry, and an optimistic maintenance factor. All three can be avoided at zero cost during design.

Key takeaways

A car park and parking area lighting project holds up over time when requirements are declared, the calculation reproduces real conditions and on-site verification follows an agreed protocol. Component selection matters, but comes later: without measurable requirements even the best product delivers a result that cannot be demonstrated. Centro Studi Lumeitalia makes its technical office available to review requirements and design checks.

Methodological note: This content is written for technical information purposes by Centro Studi Lumeitalia and does not replace the lighting design or a full reading of the standards cited. Applicable performance values are those of the standards in force at design time.

Domande frequenti