From kerosene lamp to incandescent lamp, energy saving lamp. The elimination of the lighting industry is also relatively fast, people are always in the pursuit of perfection, and to environmental protection. As a result, but also to promote the further development of the lighting industry.

目前用于照明的电光源主要有白炽灯、卤钨灯、荧光灯及高强度气体放电灯，包括高压汞灯、高压钠灯及金属卤化物灯等。为了实现照明节能，选用电光源时首先要考虑发光效率。但对不同的使用场合和要求也要考虑电光源的其它特性。电光源的主要特性有发光效率、显色性、使用寿命、使用要求及成本等。发光效率?7=产生的光通量[lm]/耗电功率[W];显色性通常称为显色指数 ，它能直观地描述电光源显色性能的高低。以太阳光的R=100为标准。光源实际的 越高.光源显色性能越接近于太阳光，光源显色性能也越好。

　　　Currently used for lighting electric light source incandescent lamps, halogen lamps, fluorescent lamps, high intensity gas discharge lamp, high pressure mercury lamp, high pressure sodium lamp and metal halide lamp. In order to realize the energy saving, the light emitting efficiency should be considered when selecting the electric light source. But other characteristics of electric light source should be considered for different applications and requirements. The main characteristics of the electric light source are light emitting efficiency, color rendering, service life, use requirements and cost, etc.. Luminous efficiency? 7 = flux [lm]/ power consumption [w]; color commonly known as color rendering index, it can directly describe the electric light source significantly color performance level of. R=100 as the standard of sunlight. The higher the actual light source, the more close to the color rendering performance of the light, the color rendering performance of the light source is also better.

光源的节能主要取决于它的发光效率。选择高效率的光源有利于减少照明电能的消耗，通常使用的路灯照明光源有高压钠灯、金卤灯。一般情况下，多数设计人员愿选择高压钠灯，因为在相同的电功率下，高压钠灯光通量要比金卤灯大40% 左右，且它的透雾性能比较好，而在相同的道路照明要求下(如一样的照度标准)，金卤灯光源的电耗多于高压钠灯。然而，当进一步研究道路照明的要求时，金卤灯光源往往比高压钠灯有更好的视觉效果。从某种意义上说，照明的视觉效果反映了人们对照明质量的评价，而照明的亮度、照度指标反映的是照明数量方面的信息。有文献表明：合适的色温和高显色指数的光源能有效提高能见度和清晰度，给人们带来舒适的视觉效果。这意味着，光效高的高压钠灯因光线中含有较多的红、黄成份，视觉度不够好，反而不及金卤灯(光线含较多兰、绿成份)。采用瞳孔大小的影响校正后，金卤灯的光效由80lm/W 上升为141 瞳孔l m / W ，而高压钠灯则由标称的1 2 0 1 m /W 下降至76 瞳孔lm/W，仅为金卤灯等效光效的一半左右。从照明节能的角度看，选用瞳孔亮度大的光源有利照明节能，并有利于光环境质量的改善。因此，在城市道路照明设计中，在城市道路的交叉路口、广场、公园人口，或受浓雾影响较小的城市，需要明显改善视觉环境的场合，可以考虑选用金卤灯照明光源。

　　　The energy saving of the light source mainly depends on its luminous efficiency. Choose an efficient light source to reduce the consumption of electrical energy for lighting, commonly used in street lighting light source with high-pressure sodium vapor lamp, metal halide lamp. Under normal circumstances, most designers may choose high-pressure sodium lamp, because under the same power, high pressure sodium lamp luminous flux to metal halide lamp is about 40% larger than, and it through fog performance is better, and in the same road lighting requirements (such as the illuminance standard), the power consumption of the metal halide light source more than high pressure sodium lamp. However, when further study the requirements of road lighting, metal halide lamp light source often has better visual effect than high pressure sodium lamp. In a sense, the visual effect of lighting reflects the people's evaluation of the quality of lighting, and the brightness of the lighting, lighting indicators reflect the amount of information in terms of lighting. Studies have shown that: the light source of the appropriate color temperature and high color rendering index can effectively improve the visibility and clarity, and give people bring comfortable visual effect. This means, high luminous efficiency of high pressure sodium lamps for light contains more red, yellow ingredients, visibility is not good enough, but less than the metal halide lamp (light containing a Dolan, green ingredients). The effect of pupil size correction, metal halide lamp light efficiency 80lm / W by rising 141 pupil L M / W, and high pressure sodium lamp is by the nominal 1 2 1 0 m / W fell to 76 pupil LM / W, only about half of the metal halide lamp equivalent light effect. From the point of view of lighting energy saving, the use of a large pupil brightness of the light source is conducive to energy saving, and is conducive to the improvement of the quality of light environment. Therefore, in the urban road lighting design, in urban road intersections, squares, parks, population, or fog is less influenced by the city and need to significantly improve the visual environment of the occasion, can consider to choose metal halide lighting light source.

我国光纤照明耗电约占全国总发电量的10%--12%lll。随着我国基本建设的快速发展和人民物质文化生活水平的日益提高，科技和经济发展的突飞猛进.城市建设规模的不断扩大。城市灯光夜景亮化工程的加速。工业商业的发展.全国照明耗电量将每年以15%的速度递增。对于中国这样一个发展中国家。在能源又十分短缺的情况下。为了能使国民经济持续、高速、健康地向前发展，必须控制照明用电量。重视光纤照明节能事业的发展。

　　　China's optical fiber lighting power consumption accounts for about 10%--12%lll of the total power generation. With the rapid development of China's basic construction and the increasing level of people's material and cultural life, the rapid development of science and technology and the rapid development of economy. Accelerate city lighting landscape lighting engineering. Development of industrial business, the national lighting power consumption will be increased by 15% per year. For such a developing country as china. In the case of energy shortage. In order to make the national economy sustained, rapid and healthy development, it is necessary to control the power consumption of lighting. Attach importance to the development of optical fiber lighting energy saving cause.

人们对城市照明的重要组成部分——城市道路照明要求越来越高。道路照明在提高城市形象、改善城市环境的同时，不可避免地带来电费的大幅度增加以及能源的巨大消耗。据相关资料显示，城市路灯总量从2001 年的500 多万盏上升到了2004 年的1000 多万盏，增加了整整1倍，并且这两年仍然保持了10%以上的增长速度。快速增长的道路照明，其耗电量的增长也是不言而喻。这与国家积极推行的节约能源的政策存在一定的矛盾。因此，必须高度重视并切实做好道路照明节能工作。

　　　People are more and more important to the urban lighting. Road lighting in improving the image of the city, improve the urban environment at the same time, inevitably lead to a substantial increase in the cost of electricity and a huge amount of energy consumption. According to relevant information, the total amount of urban street lamps from 2001 to about 5000000 in 2004 rose to about 10000000, an increase of 1 times, and the two years still maintained a growth rate of more than 10%. Rapid growth of road lighting, the growth of its power consumption is also self-evident. There is a certain contradiction between this policy and the national energy saving policy. Therefore, we must attach great importance to and earnestly do a good job in road lighting energy conservation work.