Kore is an optical system consists of a lens and a ‘black pupil’. The PMMA catadioptric lens with double internal reflection allows for precise control of the light beam and a slim design. Its shape allows for complete internal reflection without the need for metallisation treatments. The pupil hides the light surface from the observer’s sight. During the night, when the light is on, the pupil avoids dazzling; during the day, when the light is off, the pupil screens the COB’s LES.