The Pelco LL27WF is a powerful infrared illuminator for nighttime use with cameras having low light capabilities in the IR spectrum (above 700 nm), but require a minimum amount of visible light. A built-in IR "covert" filter allows approximately 0.01 percent of visible light to be transmitted. IR illumination is controlled by an integrated photocell and automatically activates when light levels fall below a certain threshold. A time delay function prevents the unit from shutting off by a momentary burst of light such as that received from a passing vehicle's headlights. This IR illuminator can be mounted on a wall, ceiling or pedestal using optional Pelco mounting hardware.