Patent ID: 7323820

Claim:
A metal halide lamp having a ceramic discharge vessel, the inner contour of which is convex in form with rounded ends, wherein the discharge vessel contains a fill which comprises starting gas, preferably as noble gas, mercury and metal halides, the metal halides comprising two groups, namely the first group made up of the emitters and the second group made up of the wetters, wherein the second group at least comprises one of the halides of Mg and Yb, with the proportion of these constituents of the second group amounting to at least 15 mol %, with the option for Ca halide to be an additional constituent of the second group, in which case the proportion of the entire second group amounts to at most 55 mol % of the metal halides, wherein the first group comprises at least halides of the rare earths, wherein the first group comprises halides of Na and/or thallium as an addition, wherein the proportion of the additions amounts to at most 34 mol % of the metal halides, in particular in a mixture of from 1:2 to 2:1 between N and Tl.