Proper lighting or illumination is very important in the world of CCTV. If an object is not illuminated it is very difficult to produce a viewable picture. Fortunately there are security cameras that can work in very little visible light. We now have security cameras that can "see" with infrared light. This can be quite useful if your CCTV application requires your security camera to work in the dark. Infrared light is invisible to the human eye, but to a security camera that is sensitive to this type of light it may appear to be daylight while remaining dark to the observer.