AUTOMOBILE DISCHARGE LAMP

摘要

PROBLEM TO BE SOLVED: To provide a brighter lighting fixture with the same light source power consumption by converging emitted light through an arc in a narrow angle in a vertical direction to a lamp axis so as to enhance the capture efficiency of a reflector. SOLUTION: An inner face 21a is formed into a curved face convex inward along a lamp axis 2 direction and an outer face 21b is formed into a curved face convex outward along the lamp axis Z direction in a discharge room portion 21, and a taper portion 22a formed into narrow in a discharge room portion 21 side is provided at least on crushing direction side faces at the crushing time in a sealing process in a sealing portion 22 so as to form an automobile discharge lamp 1. Accordingly, a convex lens action by the convex face of the inner face 21a and the outer face 21b is attained so that emitted light through an arc is converged in a narrow angle in a right angle direction to the lamp axis Z and reaches a reflector efficiently.