An endoscopy system including: an endoscope； a light source； an optical cable connecting the light source to the endoscope； wherein the endoscope includes at least one bundle of endoscope optical fibers； the cable includes at least one bundle of cable optical fibers； a light source coupling point provided where light is coupled into the cable optical fibers； an endoscope coupling point provided where light is coupled from the cable optical fibers into the endoscope optical fibers； and the light source is configured to selectively illuminate individual cable optical fibers or groups of cable optical fibers at the light source coupling point, the light source including a controller to control the light source such that at least some of the cable optical fibers not coupled to endoscope optical fibers at the endoscope coupling point are not illuminated by the light source.
