CCTV – 7 tips For The Right Lighting
Blurry video footage is often the result of poor or incorrect lighting.
In this blog post, we will give you 7 tips on how to fix the problem or what good things to keep in mind when installing CCTV.
1. Image Quality
To obtain clear images, it requires a lot of light to clearly illuminate the area. Lighting is basically based on what we call the inverse square rule: When you double the distance to a certain subject, you need 4x the original light.
2. Think vertical illumination
Most designs lighting for CCTV with vertical lighting. If you choose horizontal lighting, for example, dark shadows will make it difficult to recognize people and faces clearly. You may want to consider mounting additional fixtures at face height - typically about 1.6 meters.
3. Mount of lights
The luminaires must be mounted behind the camera and pointed in approximately the same direction. In addition, you should use light to create a uniform illumination in the camera's field of view to avoid images consisting of dark or blurred areas. If you choose to buy cameras with built-in lighting, typically mounted around the lens, you should avoid the cheap versions.
4. Take control of camera and light placements
One mistake we often see is when the camera faces the sun or a lit shop window or street lamp. If you do this, you risk getting images where the subject is too dark to discern the various details. Therefore, you need to think carefully about the location and the number of cameras when you want to achieve good lighting.
5. The right color rendering
It is recommended that you go for a color rendering of at least 80. Furthermore, many CCTV manufacturers advise to use cool color temperatures of typically 5000K.
6. Aim the light on the subject
We often talk about light levels, but in this case you have to measure the light that actually hits the subject's face. You should aim to reach 30 LUX from floor level when measuring at a vertical angle. This may be difficult to achieve in practice, but 20-30 LUX will be acceptable depending on the circumstances.
7. Flimmer and blur motion
There are many different types of cameras, so make sure you pay attention to the challenges associated with each one. Some cameras may indicate that they operate in low light conditions, but only produce monochrome recordings, but if you want to "capture" a moving car or person, you are unlikely to get a clear picture.