| 摘要 |
PROBLEM TO BE SOLVED: To provide a lamp that can be easily manufactured and is well suited for operation at reduced power.SOLUTION: The object of the present invention is achieved by a high pressure gas discharge lamp 10 comprising a discharge vessel 20 and electrodes 24. The electrodes 24 project into a discharge space 22 surrounded by a discharge vessel wall 30 of quartz material, and the discharge space 22 has a filling of rare gas and a metal halide composition which is free of mercury. The high pressure gas discharge lamp 10 further comprises an outer enclosure 18 provided around the discharge vessel. The outer enclosure 18 is sealed and filled with a gas. The discharge vessel 20 has an inner diameter of 1.7-2.4 mm. The discharge space 22 has a volume of 12-20 mm. The nominal power ranges from 15 to 30 W. The metal halide composition comprises at least halides of Sodium and Scandium. |
