what are the small red lights around the CCTV cameras?

The small red lights around CCTV cameras are known as infrared LEDs or IR LEDs.

They are designed specifically to provide illumination in low-light or complete darkness, enabling clear image and video capture during nighttime hours³⁵.

They serve as a visual cue to let individuals know that their actions are being monitored and recorded, and acts as a deterrent to potential criminals or intruders².

The red light on a security camera typically indicates that the camera is currently recording or in an active state of surveillance.