What is a low-light camera for surveillance cameras?

What is a low-light camera for surveillance cameras?

Due to the poor monitoring effect of general cameras in the nighttime low-illumination and severe use places, low-illuminance is an important indicator of the camera. The low illumination index of general cameras is below 0.5lux for color and 0.05lux for black and white. How low the illuminance can be depends not only on the lens aperture size (f value), but also on the conditions under which the marked lux value can appear. In terms of aperture size (f value), the larger the aperture, the smaller the f value it represents and the lower the illuminance required.