An external rear view mirror of a vehicle with a turn signal lamp being housed in the external rear view mirror, wherein the external rear view mirror includes a casing which houses a mirror and the turn signal lamp being integrated into the rear of the mirror casing, and the turn signal lamp comprises a light reflector arrangement, including at least one light emitting diode light source, for each light source the light reflector arrangement including: • a first reflector configured to receive light from the light source, • a second reflector configured to receive light reflected by the first reflector towards the second reflector such that light reflected from the second reflector has substantially uniform luminance observable from a single direction, wherein the second reflector includes light scattering means consisting of either a rough surface, pillow optics or a wave form comprising a plurality of trough-shaped reflectors, and • a lens configured to receive the light reflected from the second reflector, the lens providing a viewing surface for the light reflector arrangement, ∘ wherein substantially all light emitted from the light source is incident upon the first reflector and the second reflector being configured to reflect light through the lens such that substantially all light reflected from the surface of the second reflector is directed towards the lens, and ∘ wherein an observable portion of the turn signal lamp is the lens, which has an elongate profile shaped to conform to the outer contour of the mirror casing, wherein the light reflector arrangement includes a plurality of LED light sources mounted to a printed circuit board, with each light source being associated with a first reflector and a second reflector which are integrally moulded and arranged adjacent one another in a lamp housing, characterised in that the light sources are mounted above a viewable portion of the lens behind part of the mirror casing, when the external rear view mirror is mounted to the vehicle, such that the light sources are not directly viewable through the lens. • a first reflector configured to receive light from the light source, • a second reflector configured to receive light reflected by the first reflector towards the second reflector such that light reflected from the second reflector has substantially uniform luminance observable from a single direction, wherein the second reflector includes light scattering means consisting of either a rough surface, pillow optics or a wave form comprising a plurality of trough-shaped reflectors, and • a lens configured to receive the light reflected from the second reflector, the lens providing a viewing surface for the light reflector arrangement, ∘ wherein substantially all light emitted from the light source is incident upon the first reflector and the second reflector being configured to reflect light through the lens such that substantially all light reflected from the surface of the second reflector is directed towards the lens, and ∘ wherein an observable portion of the turn signal lamp is the lens, which has an elongate profile shaped to conform to the outer contour of the mirror casing, ∘ wherein substantially all light emitted from the light source is incident upon the first reflector and the second reflector being configured to reflect light through the lens such that substantially all light reflected from the surface of the second reflector is directed towards the lens, and ∘ wherein an observable portion of the turn signal lamp is the lens, which has an elongate profile shaped to conform to the outer contour of the mirror casing,