The performance of the entire system depends on all of its components, including the camera, the lens, the IR reflectivity of the object, and the IR illuminator. To get the most performance out of your system in lowlight follow these simple tips:
Use true Day/Night cameras with a physically removable IR cut filter.
Use an IR or White Light illuminator with adequate output power.
Make sure your camera is equipped with an IR corrected lens. It solves the problem of focus-shift between night and daylight, which causes a blurry picture.
Match the angle of the IR illuminator to the camera’s field of view.