Starlight technology is a feature built into a security camera which allows it to view and record quality images and video in low light conditions, for example, at dusk or sunset, or even in the darkness of night.
Sensors on the camera detect the amount of light available in the environment, generally to as low as 0 Lux (depending on the make and model). These sensors then adjust the settings of the camera’s aperture and shutter speed. The camera will also automatically switch to black and white mode to assist further in capturing clear footage.
Lux (abbreviated to Lx) is the standard unit used to measure amounts of luminous emittance over a given area. In scientific terms, 1 Lx = 1 Lumen per square metre. A Lumen is the total quantity of visible light emitted by a source. The human eye can typically function and see in conditions of 20 Lx or more.
There is a wide variety in minimum illumination requirements among the various models and brands. Some can operate at 0 Lx, while others are slightly higher.