Record what a person must see and do
Brightness alone does not describe whether a route, face, sign, step, crossing, or help point is usable.
- Visual task
- Name what the user needs to see at the exact location, such as a curb edge, face, sign, keyhole, or path turn.
- Contrast and glare
- Stand at user height and note where a bright source hides the darker space beyond it or reduces adaptation.
- Route continuity
- Walk from entrance to destination and back. Record gaps between fixtures, activity, crossings, and help access.
Measure the task a person must complete, not only whether a fixture is bright. Can users see the path, step, crossing, sign, face, help point, and space beyond the light? Record glare, dark adaptation, shadows, outages, vegetation, surface changes, and the transition between adjoining areas at the time the route is used.
Separate maintenance from design. Cleaning a lens, repairing a failed lamp, or trimming a blocked fixture differs from changing height, aiming, shielding, color, controls, or electrical supply. Technical changes may need a qualified professional and review of homes, accessibility, energy, environmental effects, and the wider route. Repeat the same observation after work is complete.
- Name the exact visual task and observation point.
- Record glare and contrast as well as apparent brightness.
- Recheck user experience after maintenance or design changes.
Lighting safety audit checklist
Audit the route at the time it is used. Separate failed lamps and vegetation from design questions that need technical review.
Specific observation
Instead of 'car park is unsafe,' the audit records that a bright wall fixture creates glare at the pedestrian exit, leaving the payment area behind it difficult to see. Maintenance can then test aiming, shielding, contrast, and route visibility.
Why glare and contrast matter alongside brightness
- More light can create glare, spill into homes, harm environmental goals, or produce harsh contrast.
- Lighting can support visibility but does not replace maintenance, active use, clear routes, or help access.
- Incident data and user experience should inform the same review without treating correlation as proof.
Evidence basis: The cited sources support the checks above. They do not replace current provider, property, workplace, authority, or local requirements. National Institute of Justice: Crime Prevention Through Environmental Design and CDC: Preventing Community Violence.
Technical, residential, and environmental limits
More light is not automatically better. Fixture changes may require a qualified lighting professional and must consider spill into homes, accessibility, energy, environmental goals, maintenance, and the wider route.