Infra-red Night Vision
The ability to see at night in pitch black or difficult light conditions has been greatly improved by advancements in LED infra-red illumination and low light sensitive camera technology.
Infra-red provides the light source that is invisible to the human eye but visible to IR responsive cameras.
Infra-Red LED illumination avoids light pollution, traffic lighting hazards and expensive replacement bulbs. Where colour is required in the dark or for visual deterrence LED white lighting can be used in conjunction with sensors.