摘要
　　LED作为一种新颖的固体照明光源，具有生产过程以及产品几乎无污染，不怕震动，可轻易实现0~100%的连续调光，能在安全特低电压下工作，可连续工作于开关闪断的工作状态以及其光输出具有定向性等诸多独特的优势，近年来在其光效和光色上的明显进步已使它能进入商业化应用。但由于我国计划经济产业布局的影响以及LED的专业知识和照明电器综合知识在从业人员中普及的不足，造成了在实际的设计和应用中，没有针对LED的特点进行扬长避短的应用，出现了众多不合理及不合格的应用产品。本文就LED应用于道路灯具中目前存在的问题进行了分析，也给出了解决问题的思路和实例，供广大同行参考。

Abstract
　　As a new-fashioned solid state lighting source, LED has many unique advantages such as nearly no pollution of the product and in the production process; resistance to vibration; easily dimmering from 0 to 100%; operating under safe extra low voltage; continuously operating under the condition of switch-off; having a fixed direction of the light output etc. In recent years, LED’s obvious improvement of luminous efficacy and photometric characteristic let it be applied for commercial purpose. But for the influence of our country’s plan-economics industry arrangement and for the lack of the popularization of LED professional knowledge and comprehensive knowledge of lighting equipments in the professional personnel, LED is not appropriately applied in practical design and application according to its characteristics and there appear many unreasonable and unqualified application products. This passage analyzes the problems occurring in LED’s application in the luminaries for road and street lighting and also put forward some ideas and examples for solving the problems, as reference to professional colleagues

Key words: lamp-house, directional luminescence, thrice goniophotometry，
excess illumination, system efficiency, LPD

　　LED应用于照明领域，是目前我国乃至世界照明界的热门话题，通过从业人员的不断努力，目前照明用白光LED在通常的照明工作条件下的系统效率（包括驱动电路），已达到40lm/W，再加上照明用LED制造成本的大幅下降，所以照明用白光LED已具备应用到一些照明领域的商用条件。但是，由于我国从计划经济时代以来很多年的产业结构分布所造成的局面，使得目前制造照明LED的产业群体往往缺乏对照明电器基本知识和要求的了解，而传统的照明灯具生产群体也往往缺乏对照明用LED特性的深入了解，在设计和应用中没有充分地利用LED的特点，进行扬长避短的使用，所以造成了在照明LED应用到照明装置中时，产生很多不合理的错误设计。本文就目前照明用LED应用