中文摘要：

为了比较金属卤化物灯和高压钠灯的发光效率，计算得到了两种光源在明视觉和暗视觉条件下的发光效率，并参照现行的发光效率计算式以及人眼神经结细胞对光辐射产生的生物效应和司辰视觉光度学系统，计算得到了两种光源的司辰视觉发光效率。结果表明，金属卤化物灯的明视觉发光效率小于高压钠灯的明视觉发光效率；金属卤化物灯的暗视觉发光效率是高压钠灯暗视觉发光效率的2倍多；金属卤化物灯的司辰视觉发光效率是高压钠灯司辰视觉发光效率的3倍多。在道路照明中使用金属卤化物灯比使用高压钠灯更有利于节能。

英文摘要：

In order to compare the luminous efficiencies of metal halide lamp（ dysprosium lamp） and high pressure sodium lamp, the luminous efficiencies of these two lighting sources under photopic and scotopic light levels are calculated, and the citopic luminous efficiencies of these two lighting sources are calculated based on the biologic effect produced by nerve cell on the human retina to light, citopic photometer system, and active formula of luminous efficiencies calculation. The results indicate that the photopic luminous efficiency of metal halide lamp is less than that of high pressure sodium lamp, the scotopic luminous efficiency of metal halide lamp is more than 2 times of that of high pressure sodium lamp, the citopic luminous efficiency of metal halide lamp is more than 3 times of that of high pressure sodium lamp. In the application of road lighting, metal halide lamp can save more energy than high pressure sodium lamp.