CERAMIC METAL HALIDE LAMPS

The invention relates to a high-pressure discharge lamp (1) of the ceramic metal halide type having a molybdenum coil (50) wrapped around the ceramic discharge vessel (20) and at least a portion (32, 42) of the electrode feed through means, and having power ranges of about 150W to about 1000W. The discharge vessel (20) has a ceramic wall (22, 24, 25) and is closed by a ceramic plug (26, 27). An electrode (30, 40) which is located inside the discharge space (21) is connected to an electric conductor (12, 13) by way of a leadthrough element (32, 42). The leadthrough element (32, 42) projects through the ceramic plug (26, 27) with a close fit and is connected thereto in a gastight manner by way of a sealing ceramic (33, 43). The leadthrough element (32, 42) has a first part (34, 44) which is formed by a cermet at the area of the gastight connection. In addition, the lamps display one or more and most preferably all of the following properties: a CCT (correlated colur temperature) of about 3800 to about 4500K, a CRI (colur rendering index) of about 70 to about 95, a MPCD (mean perceptible colur difference) of about +/-10, and a luminous efficacy up to about 85-95 lumens/watt, a lumen maintenance of >80%, colur temperature shift