In order to see at night, most CCTV cameras use infrared (IR) technology. ... These emit infrared light at night, which allows the camera to see even in total darkness. Infrared light is invisible to the human eye, which is why burglars cannot see that the CCTV camera is activated.

How does camera work at night?

IR or night vision cameras use infrared light to illuminate images in the dark. We can't see it, but infrared light is actually all around us. IR cameras detect these invisible infrared wavelengths, enabling the camera to see in the dark.

Can a CCTV camera work without light?

The short answer is no. CCTV cameras require electricity to fully function, but it is possible for them to work even when the power is down.