Lamp, lamp holder, and assembly of such a lamp and such a lamp holder

The invention relates to an assembly of a lamp and a lamp holder. The invention also relates' to a lamp' for use in an assembly of a lamp and a lamp holder. The invention further relates to a lamp holder for use in an assembly of a lamp and a lamp holder. Assembly of a lamp (2) and a lamp holder (3), said lamp comprising at least one light-transmissive vessel (4) being sealed at one single end by a lamp base (5), said lamp base (5) being provided with a substantially annular flange enclosing an accommodating space for multiple current- supply conductors (6) connected to said vesel (4), wherein the annular flange is provided with coupling means (7), said lamp holder (3) comprising at least one protruding portion (10) being provided with counter-coupling means (14), and electrical contact members (13) adapted to be electrically connected to the current- supply conductors (6) of the lamp (2), wherein the protruding- portion (10) of the lamp holder (3) is adapted to engage the annular flange of the lamp (2) for a