Patent ID: 7458702

Claim:
A lighting unit comprising a concave reflector having an axis of symmetry and a light emission window bounded by a circumferential edge of the reflector that is transverse to said axis, an elongate body arranged substantially axially on the axis of symmetry and accommodated in a holder opposite the light emission window, an axially positioned cap serving as an optical screening means which surrounds the a light source at least partly so as to intercept unreflected light rays, wherein the light source is surrounded by a sleeve having an end facing the light emission window, and the cap is positioned over the sleeve adjacent said end by means of a locking element provided at the sleeve, wherein the cap is provided with a screening ring having a ring edge facing towards the light source, and the locking element is provided with a tag-shaped element that grips into the ring edge with spring force radially away from the light source.