Yes, CCTV Cameras are very effective at night. All thanks to Infrared vision. In areas of complete blackout/darkness, the IR LEDs enable the cameras to capture images. As a matter of fact, the higher the number of IR LEDs, the better will be the recording at night. Thus, contributing to making the CCTV cameras effective at night. Besides IR LEDs are the motion and audio sensors. CCTV cameras that are equipped with these technologies alert you through the apps and emails whenever the cameras sense motion or audio interferences. Generally, the cameras with such facilities are located at vantage positions. Most often, people switch on these detectors at night so that the cameras start recording the minute they sense any motion or audio disturbance.