Security lighting specialists Derwent has extended its Aegis range of illuminators to include a covert 940nm version and a powerful visible white light version for use with colour and day/night cameras. The ranges was designed and developed in response to customer feedback. Featuring (patent pending) Constant Light technology, its illuminators automatically control and adjust light output to compensate for LED degradation over time, a problem common with all other LED based illuminators. An issue identified by security consultants, specifiers and end users alike, LED degradation results in poor light output, reduced image quality and reduced illumination range.