Traditionally cameras only have the infrared light provided by the few LED's on the front of the camera to help it see at night. This infrared illuminator act's like an Infrared floodlight and floods the area with a large amount of infrared light that is invisible to the human eye but the cameras will be able to use the extra light to make a huge improvement to the quality of the night vision already available. This VSIR11W30D is IP66 rated with tempered glass panel and aluminium die-casting housing, suitable for indoor or outdoor use. This illuminator has a narrow spotlight like beam suitable for long narrow back yards or looking down a long driveway. This will give a much better chance of making out smaller details such as faces and clothing at night.