Infrared (IR) light is invisible light that the human eye cannot detect; this invisibility is attributed to the fact that infrared light makes use of longer wavelengths than is the case with the wavelength of light from the visible spectrum. Infrared security cameras therefore work on the premise of being able to capture images based on very little or no light. Light levels are actually measured in terms of ‘lux’. A low lux rating enables a camera to see better in darkness and also when there is no light at all.

Most cameras that use infrared light will have lux ratings of 0 which of course means that such a camera will be able to see when there is absolutely no light around at all.

Some people even choose to use color infrared cameras that are able to switch over to taking black and white images in the dark, while in the daytime they provide color images. In order to determine whether to shoot in color or in black and white these cameras have photo cells inside the camera that monitors and keeps track of whether it is daylight or not.

Even when there is very little available light the LEDs help the IR security camera to produce images that are very similar to what you would get in daytime hours.

Today, you can find some amazing camera units that combine the best of infrared technology with that of electronic and even optical technology. This then helps to create the ultimate security camera that can, under controlled conditions, provide shooting capability at distances over 100 yards.

You can purchase an IR security camera from many local surveillance or alarm companies, however many times you will find better deals and more selection from online security camera retailers.

These cameras can see when there is absolutely no lighting and also in conditions when there is minimal lighting. They have infrared lights that are installed all around the lens of the camera and this is what enables them to shoot pictures in very little or no light. Yet the IR security camera can produce pictures that are as good as what you may find under normal daylight conditions.

One of the most common types of IR security camera, the bullet camera is usually found being used in factories. These cameras can shoot for up to 75 feet or more – even when it is pitch dark. And, under dim lighting conditions the shooting range extends beyond the seventy-five foot limit.

Dome cameras are also very effective in securing properties that have numerous blind spots (where there is little or no light). The C- mount IR security camera is not such a good option as it requires that the camera be housed in an outdoor camera housing, this in turn reflects the infrared lights and causes degradation in the quality of pictures.

The Thermal IR security cameras are able to take pictures based on heat signatures rather than on the actual picture. This option however is usually more expensive and often does not provide desirable results for identification. The better IR LED security cameras can however provide images that are as good in comparison to a normal camera when shooting under daylight conditions.