On this kind of high-quality night vision cameras, infrared LED's light up automatically every time a light background down to a level that is too low for ordinary image sensors to produce high quality images.
Infrared LED light operates at frequencies beyond human ability to see the light, but the image sensor in the camera is designed to detect light as the light that we can see.
The main difference between the visible and infrared light seen when using colored reverse camera system. One of the most visible difference between high quality and low quality sensor rear view camera is its ability to illuminate the area seen by the camera.
Ideally, an infrared illuminator will illuminate the entire angle of view produced by the camera and will illuminate a distance of at least 6 meters away from the camera. High quality camera typically will illuminate up to a distance of 9 to 15 meters from the camera.
Number of LED camera may be important or may not be important to consider, but the total light output and sensitivity to infrared light camera will determine the overall performance of the camera for night vision.
Some brands or manufacturers will promote their products excessively. If anyone says that it sells cameras have infrared illuminators capabilities exceed a distance of 50 feet should be ignored because it is not possible.
Never try to use a reverse camera system that has no night vision lighting. Infrared illuminators lighting must provide a minimum of 3, 6 to 9 meters or more in order to reverse camera on your car can function optimally.
