Illumination quality (IQ) test

CCTV Handbook 2011 Surveillance

Lighting is a critical aspect of surveillance.

Run through this quick 10-point check every time you specify or install a CCTV system.

1. Is white-light or infrared illumination required?

2. Ensure the horizontal angle of illumination covers the full field of view

To provide high quality images is essential. Simply match the illumination to the field of view of the lens using a lens calculator.

3. What is the maximum distance to illuminate?

Specify the illuminator model based on the illumination angle and distance required.

4. If white-light is needed, ensure that colour corrected white-light is used.

Check that red, green and blue colours can all be seen accurately during night-time operation.

5. If Infrared is needed specify the wavelength carefully.

Lower wavelengths such as 850 nm provide greater distances. Longer wavelengths such as 950 nm provide covert illumination but achievable distances are reduced and there is an increased risk of focus shift between day and night.

6. Consider the maintenance and running costs of the illumination system.

Ensure that long life, low consumption lighting is used.

7. Consider the positioning of the lighting.

It should be fitted so that no camera is looking directly at a light source. The best solution is mounting the illumination at the camera position. Also, consider any line of sight obstacles. As light travels in straight lines, any obstacles such as overgrown foliage will create shadows.

8. Consider the camera and lens.

A high performance camera and lens will provide higher quality images with CCTV lighting. Lower performance camera and lens combinations will require additional lighting to provide similar results.

9. If the illumination is being used with a fully functional dome camera then a choice must be made between wide angle illumination, local area illumination or target area illumination.

Wide-angle illumination is preferential as it can provide 360° lighting for the dome.

10. Is light pollution a critical factor?

Using white-light ensure that the illuminators are pointing down to minimise light pollution. If no light pollution is permissible then infrared lighting must be used.

Technical Tip

If the exact field of view is unknown, adaptive illumination products can be used to provide vari-focal lighting.

Technical Tip

Even illumination – every CCTV lighting system should provide even illumination.

For more information contact Geutebrück, +27(0)11 867 6585, [email protected], www.geutebruck.com





Share this article:
Share via emailShare via LinkedInPrint this page



Further reading:

Vumacam highlights concerns with proposed Johannesburg CCTV by-laws
Vumacam News & Events Surveillance
Vumacam has raised objections to critical provisions of the by-laws governing privately owned CCTV cameras with a view of public spaces in the city, which were promulgated on Friday, 28 February 2025.

Read more...
Milestone announces a platform to enable access to data and train AI models
Surveillance AI & Data Analytics
Milestone Systems has announced Project Hafnia to build services and democratise AI-model training with high-quality, compliant video data leveraging NVIDIA Cosmos Curator and AI model, fine-tuning microservices.

Read more...
Benchmark in long-range surveillance
Duxbury Networking Surveillance Products & Solutions
Duxbury Networking says the long-range, high-resolution monitoring AXIS Q1809-LE bullet camera has been enhanced further with integration into Milestone XProtect to set a new standard for forensic-level image clarity, intelligent event detection, and enhanced security management.

Read more...
AI for retail risk management
Surveillance Retail (Industry) AI & Data Analytics
As businesses face mounting challenges in a volatile economic environment, Ares-i remains an essential tool for proactively identifying, assessing, and mitigating risks that threaten operational stability and customer satisfaction.

Read more...
The need for integrated control room displays
Leaderware Editor's Choice Surveillance Training & Education
Display walls provide a coordinated perspective that facilitates the ongoing feel for situations, assists in the coordination of resources to deal with the situation, and facilitates follow up by response personnel.

Read more...
Six key security technology trends in 2025
Axis Communications SA Surveillance
Axis Communications examines some new trends for the security sector in 2025, as well as some new, old trends that are once again highlighted because of their benefit to the end user in the race to obtain optimal value from technology installations.

Read more...
edgE:Tower video analytics integrated with SEON
Surveillance Integrated Solutions AI & Data Analytics
Sentronics has announced a new integration between its edgE:Tower advanced AI-driven video analytics solution and SEON, a Central Monitoring Software (CMS) platform. This integration enhances real-time situational awareness and automated threat detection for control rooms.

Read more...
The impact of video analytics on business security
AI & Data Analytics Surveillance
As more enterprises work to integrate AI-enabled solutions into their networks, enterprises must not lose sight of the implications of these integrations and the added value they are working to unlock.

Read more...
The need for integrated control room displays
Editor's Choice Surveillance Training & Education
Display walls provide a coordinated perspective that facilitates the ongoing feel for situations, assists in the coordination of resources to deal with the situation, and facilitates follow up by response personnel.

Read more...
Integration is the key to smarter surveillance
Duxbury Networking Surveillance
According to recent market projections, the local security industry is expected to grow by more than 10% annually through 2029, reflecting the increasing demand for smarter, more proactive security solutions.

Read more...