The 104 and 56 LED cameras have virtually invisible leds at night. They are
940nm LEDs. A person cannot see the leds at night when looking into the camera.
Long
range 25mm lens; Has a 13.3 degree field of view.
This means that at 100 feet away the camera will view approx. 18 ft. span from
left to right. You can recognize a persons face very easily at 100 feet in daylight.
In total darkness you will be able to see people walking at 100 feet away as well.
You will not be able to recognize a persons face 100 feet away in total darkness.
At
50 ft. away the viewing span is only 9 ft. At 25 ft. away the viewing span is
about 4 ft.