White light day and night full-color surveillance cameras do not turn on the white light at night generally because of these 3 reasons:
1. Although it is night, the environment is not dark enough to cause white light. Day and night full-color surveillance cameras will not turn on the white light at night. The brighter ambient light at night will cause the white light to turn off.
2. Insufficient power supply for this white light day and night full-color surveillance camera will also cause infrared light to be off; the insufficient power supply is generally caused by poor power quality and low power supply voltage.
3. When the white light is broken, it will not turn on. Generally, the white light wick is broken, or the light board control board is malfunctioning.