In brief: a camera can only record the light available to it. Plan lighting as part of the design, and check it at the times of day the camera needs to perform.
Pixels need light
Resolution records pixels. Light decides whether those pixels contain anything useful. A high-resolution camera in poor light can capture less usable detail than a lower-resolution camera in a well-lit scene.
Bright and dark in the same scene
Many scenes contain both extremes at once: a shaded entrance looking onto a sunlit car park, sunlight through glass doors, a vehicle moving into an underground car park. Without the right exposure handling, highlights wash out to white or shadows go black. Wide Dynamic Range (WDR) balances both. It matters most where people and vehicles cross between light and shade: doorways, gates and ramps.
After dark
- Infrared sees in darkness but records in black and white. Its range and beam must suit the scene, and it can flare off nearby reflective surfaces.
- Full-colour low-light cameras keep colour in near darkness. They cost more, which is often worth it where identification matters.
- Supplementary white light can outperform either where colour evidence after dark is essential.
Turning up gain or exposure time to make up for poor light usually adds blur and noise. It doesn’t fix the underlying problem.
Common mistakes
- Aiming for maximum brightness instead of even lighting across the scene
- Glare from streetlights, headlights or windows the camera wasn’t positioned to handle
- Ignoring how sun angles and shadows shift with the seasons, or how trees grow
- Testing in daylight and assuming the camera will perform at night
A lighting assessment during the site survey, including a check at the times that matter, avoids all of these.
The foundation under everything else
Resolution and analytics matter, but lighting comes first. For any camera meant to provide evidence, it belongs in the design from the start.
Electronic security for over a decade, after an early career in IT networks.