Infrared-illuminators are sources of light invisible (to the eye) useful for lighting up dark spaces with the purpose of obtaining good quality images with Black and White Surveillance Cameras even in case of low daylight or in complete darkness, without resorting to flood lighting. 

The most common illuminators for home Surveillance are LED (Light Emitting Diode) Infrared-illuminators. They consist in a number of small bulbs assembled in a geometric pattern within a separate casing or mounted around a camera lens in a special combined casing. 

Sturdy cases are offered for surviving harsh conditions in bad weather, simpler cases are suitable for indoor applications. 

Surveillance cameras are available that switch automatically to black and white in low light conditions, and operate infrared LED lamps to illuminate the scene.