A lamp assembly for mounting in a headlamp comprising: a heat sink, said heat sink having a printed circuit board landing area for receiving a printed circuit board and a light source landing area for receiving at least light source; a light guide; and a bracket for detachably mounting on said heat sink, said bracket being adapted to engage and secure said light guide in a predetermined position on said heat sink, wherein said heat sink is an integral or monolithic construction and is processed or folded to comprise a plurality of walls (14a, 14b, 14c, 14d) for protecting said printed circuit board, said at least one light source and an electrical connection there between, and wherein said plurality of walls (14a, 14b, 14c, 14d) comprises a first wall having at least one first wall aperture (66a, 66b) and a generally opposing second wall having at least one second wall aperture (66c, 66d), said bracket comprising at least one first resilient locking arm (52a, 52b) and at least one second resilient locking arm (52c,52d) each having a detent (52a1, 52b1, 52c1, 52d1), said detent (52a1, 52b1) of said at least one first resilient locking arm (52a, 52b) being adapted to be received in said at least one first wall aperture (66a,66b) and said detent (52c1, 52d1) of said at least one second resilient locking arm (52c, 52d) being adapted to be received in said at least one second wall aperture (66c, 66d) in order to secure or lock said bracket onto said heat sink; the lamp assembly being characterized in that; the at least one light source is mounted directly to the light source landing area, and that an exit face of the light guide is guided through an aperture of the bracket, the bracket comprising a plurality of resilient arms having ends that engage a shoulder of the light guide and hold it in locked position on the heat sink. a heat sink, said heat sink having a printed circuit board landing area for receiving a printed circuit board and a light source landing area for receiving at least light source; a light guide; and a bracket for detachably mounting on said heat sink, said bracket being adapted to engage and secure said light guide in a predetermined position on said heat sink, wherein said heat sink is an integral or monolithic construction and is processed or folded to comprise a plurality of walls (14a, 14b, 14c, 14d) for protecting said printed circuit board, said at least one light source and an electrical connection there between, and wherein said plurality of walls (14a, 14b, 14c, 14d) comprises a first wall having at least one first wall aperture (66a, 66b) and a generally opposing second wall having at least one second wall aperture (66c, 66d), said bracket comprising at least one first resilient locking arm (52a, 52b) and at least one second resilient locking arm (52c,52d) each having a detent (52a1, 52b1, 52c1, 52d1), said detent (52a1, 52b1) of said at least one first resilient locking arm (52a, 52b) being adapted to be received in said at least one first wall aperture (66a,66b) and said detent (52c1, 52d1) of said at least one second resilient locking arm (52c, 52d) being adapted to be received in said at least one second wall aperture (66c, 66d) in order to secure or lock said bracket onto said heat sink; the lamp assembly being characterized in that; the at least one light source is mounted directly to the light source landing area, and that an exit face of the light guide is guided through an aperture of the bracket, the bracket comprising a plurality of resilient arms having ends that engage a shoulder of the light guide and hold it in locked position on the heat sink.