KL900-III、KL900/600-III shadowless operation lamps adopts light bulbs imported from Germany as the lighting source, which illuminates the object of operation through a CAD-designed repercussion system. The grade of the light approaches that of sunlight; and the depth of light beam is over 500mm. In the control system, the bulbs have cold start, and can have automatic switch when damaged.If the control system is damaged, there is an emergency function for normal operation.