Kool-Sun(KS) series is used the highly effective infrared filter to optimise the cool light for providing the surgeon and patient a comfortable environment. There are multi-light source and reflectors in the lamphead which focus on the workiing area easier and eliminate the shadow from the surgons' head, shoulder, arm effectively. Multi-stage brightness control and the suitable temperature color can fully satify any requirements for different uses, and help surgeons make precise diagnosis. The luminous intensity is adjusted electronically with a membrane key board.