High pressure sodium lamp
专利汇可以提供High pressure sodium lamp专利检索，专利查询，专利分析的服务。并且PURPOSE:To improve the efficiency and to lengthen the service life of a miniature lamp, by setting the inter-electrode distance of a light emission tube made of alumina material shorter than predetermined level while selecting the average tube wall load and the effective tube wall load respectively higher or lower than the predetermined level. CONSTITUTION:The distance L between the electrodes 6, 7 provided in a light emission tube 1 made of light permeable alumina ceramic and having the inner tube of phi is selected shorter than 20mm., while the average tube wall load where the input of the tube 1 is divided by the entire inner surface area piL'phi of the tube 1 is selected within the range of 8-22W/cm and the effective tube wall load where the input of the tube 1 is divided by the inner surface area between the electrodes 6, 7 is selected higher than 25W/cm . Consequently the lamp efficiency of a miniature high pressure sodium lamp having the tube input lower than 100W is improved and the service life is lengthened.，下面是High pressure sodium lamp专利的具体信息内容。
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