Low-light cameras use light-sensitive image sensors, wide-aperture lenses, and wide dynamic range to gather available light and balance bright and shadowed areas. When ambient light is especially limited, infrared night vision or supplemental warm-white LEDs can add illumination, helping the camera capture usable detail in monochrome or color.

Low-light cameras with color night vision use a light-sensitive lens and, in some models, supplemental warm-white LEDs to capture full-color video in very dim scenes. Cameras with infrared night vision use infrared illumination to capture monochrome video in darker conditions, which can help maintain visibility when available ambient light is limited.

Choose a fixed-lens low-light camera when the mounting position and viewing area are known, since options with a 2.8 mm lens provide a consistent field of view and a straightforward installation. Choose a varifocal low-light camera when you need to adjust framing for different distances or scene sizes, with motorized 2.7 to 13.5 mm lenses supporting remote zoom and autofocus.

Low-light cameras typically require an Ethernet connection to a compatible Power over Ethernet (PoE) switch or NVR, which can provide both network connectivity and power through one cable. Depending on the model, installers can use onboard microSD storage for standalone operation or connect the camera to a multi-channel NVR, while outdoor installations should use models with weather-resistant housings and suitable mounting locations.