THE IMPORTANCE OF CCTV LIGHTING FOR ANALOGUE CAMERAS
Ambient lighting is the most important issue to consider when selecting the right camera for a specific application.
For indoor cameras, this is usually not a problem, since most indoor applications have a constant amount of light (between 50 to 300 foot candles).
However, for outdoor applications, the type and quantity of light becomes more important in determining the type of camera.
Black and white (monochrome) cameras are usually not picky about the type of light. If the amount of light drops to low levels, then you have choices – select a more expensive light sensitive camera, increase the lighting and/or add infra-red illuminators.
Colour cameras create a different set of challenges.
First, colour cameras operate in the restricted bandwidth known as “visible light”, between 400 and 790 nanometers. The use of infra-red illuminators provides no benefit unless the camera is a day/night version, automatically changing the optics of the camera from color to monochrome operation.
The second challenge for the color cameras is the colour rendering produced by the exterior illumination. For instance, a green car under normal sunlight would produce a green image on a color camera. However, under high-pressure sodium lamps, the green car would actually look blue.
Although natural sunlight is always best, studies have shown that white metal halide lights will produce the best imaging results for a color camera during low-light conditions. Lighting and Research Centre
Ask Veridin if you are not sure which camera suites your needs.