What does it mean to have an external high light on the camera

Emitting red sensor lines. According to the query related public information camera in the dark light at night is not visible in the case of the need to use the external light, that this infrared light is able to emit infrared light in the camera has a light-sensitive chip to achieve the effect of night vision. Camera is also known as computer camera, computer eye, electronic eye, etc., is a video input device, is widely used in video conferencing, telemedicine and real-time monitoring.