| 摘要 |
PROBLEM TO BE SOLVED: To provide a high mercury concentration ceramic metal halide lamp. SOLUTION: A low wattage mercury vapor lamp (mercury lamp) comprises a discharge vessel 10 including a tubular body 12, first and second electrodes 24, 26 and two end walls 16, 18, which close both ends of the tubular body. The discharge vessel contains an ionizable fill material having a concentration of mercury of from 0.10 to 0.20 mg/mm<SP>3</SP>. The discharge vessel operates at elevated pressures of 80 to 170 atmospheres at power of 20 watts resulting in improved lumen maintenance and a reduced through-life color change. COPYRIGHT: (C)2007,JPO&INPIT
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