Whether LED can replace traditional lamps depends on whether the comprehensive performance of LED exceeds that of traditional light source and whether it has long-term cost-effectiveness. On the whole, LED will probably bring a new revolution to artificial lighting and become a new type of light source that completely surpasses the existing light source. It has very good development potential and market prospect. LED street lamps have been discharged from the beginning. Whether LED can replace traditional lamps depends on whether the comprehensive performance of LED exceeds that of traditional light sources and whether it has long-term cost-effectiveness. On the whole, LED will probably bring a new revolution to artificial lighting and become a new type of light source that completely surpasses the existing light source. It has very good development potential and market prospect. LED street lamps have changed from being rejected at the beginning to being received and tried slowly, but LED street lamps still have a long way to go to replace traditional light sources. First, the difference between LED street lamps and traditional street lamps is different from the LED landscape lamps that have been fully rolled out. High-power road lighting requires wide coverage, large light projection, high uniformity and heat dissipation, it is an area where directional LED is difficult to tackle. Compared with traditional lamps, LED street lamps show different characteristics in four aspects. (I)Lamp structure. (II)Performance. (III)Light color. (4)Price. Second, the application of LED street lamps (I) LED lighting products have low thresholds and mixed quality. The bidding mode of low-priced winning materials makes it difficult for high-quality products without price advantages to be shortlisted. (II) LED products are faster with the new ones, and the products of different manufacturers are incompatible with each other and cannot be exchanged, making later maintenance more difficult. (III) The testing standard means are immature, and the standard testing means for LED products that are not yet available have increased the difficulty for us to select high-quality facilities. (4) Most products require the replacement of the whole lamp, and the maintenance cost of a single lamp is about 10 times that of conventional lamps. (5) In recent years, LED street lamp bidding has been carried out for many times in succession, of which the flow standard has reached 11 times. The main reason is that the parameters of the weight lamps of the manufacturers fail to pass the detection of the detection mechanism, it has seriously affected the promotion and use of LED street lamps. Third, the prospect of LED street lamps (I) General prospect: Although LED has been limited by color and luminous efficiency for many years, GaP and GaAsP LED have long life and high reliability, many advantages, such as low working current, compatibility with TTL and CMOS data circuits, have always been favored by users. (II) Breakthrough points in the development process: first, we need the support of industry policies, formulate unified labels and specifications, and solve the problem of client interchangeability; Secondly, we must solve the problem of light efficiency improvement; The third is to control the cost. Only by controlling the cost can the advantage of cost performance be reflected; The fourth is to ensure the working conditions of LED and the technical knowledge of power supply.