A headlight lamp has at least one lamp vessel in which at least one luminous
element
is enclosed, and a lamp base, which is provided with the electric terminals of
the headlight lamp. The base has an annular metallic holder in which the at least
one lamp vessel is fixed, and at least three reference noses arranged in a common
plane, and an annular base flange arranged parallel to the plane of the reference
noses. The base flange has at least three lugs are arranged along its circumference,
which are of resilient design and serve together with the reference noses for fastening
the lamp in a headlight. The reference noses are integrally formed on a reference
ring, which is connected to the annular metallic holder and to the base flange.