Analysis of current status of high-power LED street lamps In recent years, domestic LED lighting applications have developed rapidly. Many manufacturers have successively introduced high-power LED street lamps and used them as energy-saving products in road lighting. Currently, high-power LED street lamps can really replace traditional light sources (mainly High-pressure sodium lamp)? Here are some opinions about the application of high-power LED street lights: 1. Regarding the power saving effect of LED street lamps, in many cases where practical LED street lamps replace high-pressure sodium lamps, power saving is an important factor, but the actual LED street lamps are no less power-efficient than high-pressure sodium lamps. From the comparison of luminous efficiency, the luminous efficiency (80lm / W) of the currently used high-power LED street lamps is much lower than that of high-pressure sodium lamps (100 ~ 138 lm / W). Although LEDs are directional light, the efficiency of lamps is higher than that of high-pressure sodium lamps, but Due to the low luminous efficiency, the comprehensive energy efficiency of LED street lamps is still lower than that of high-pressure sodium lamps. In some cases that prove that LED street lamps replace high-pressure sodium lamps to obtain power-saving effects, according to analysis, these cases are often the status of the original street lamps with high power (seriously exceeding the standard) or low efficiency of the lamps and the light source is seriously attenuated. The basis for saving electricity is not scientific. Second, the light color of LED street lamps. Currently, high-power LED street lamps basically use white light with a color temperature of 5000K ~ 6000K. As a road lighting source, they are too cold on the visual sense, and the eye's observation ability will decrease in far vision. In this regard Some studies have proved that yellow light or warm white light below 3000K is more suitable for road lighting, so daylight-colored LED street lights are not suitable for street lights. 3. The current cost of LED street lamps is far higher than that of high-pressure sodium lamps. The current price of an LED street lamp is 4,000 yuan to 8,000 yuan, or even higher. The price of a set of imported high-pressure sodium lamps (including lamps and complete sets of electrical appliances) does not exceed 1,500 yuan. , The average price is less than a quarter of LED street lights. Fourth, the service life comparison, the nominal service life of the LED street lamp is more than 50,000 hours, which is the ideal life of the chip, the chip packaging, lamp heat dissipation and other factors may be light attenuation, as well as the driving circuit (mainly electronic components) Obviously, the life span cannot reach 50,000 hours. In some LED street lamps that have been tried, it is found that less than half a month, the attenuation of the lamp has been very obvious. The nominal life of high-pressure sodium lamps has now exceeded 28,000 hours, and the practical application is not a problem for 3 to 4 years. In contrast, the life of high-pressure sodium lamps and supporting electrical appliances is much more problematic. For the maintenance of the light source, the high-pressure sodium lamp is much easier, and the light source electrical appliance can be replaced directly on the spot, and the cost is also lower. As for the LED street lights, I think the manufacturers think it is maintenance-free, so on-site maintenance can not be carried out. Fifth, the light distribution problem of LED street lamps. At present, the light distribution technology of LED street lamps has been greatly developed. Some manufacturers have developed secondary light distribution systems instead of relying solely on chip arrangement for light distribution. The light distribution can not be completely reasonable. I have observed a luminaire. The light distribution on the road side is brighter and the uniformity also meets the requirements, but the sidewalk side brightness is obviously insufficient, and the SR value obviously does not meet the requirements. At present, there are not many products that have developed a secondary light distribution system, and there are not many good LED street lamps available for application. Sixth, LED street lamps lack uniform technical standards in terms of product specifications. At present, there is no unified LED street lamp production technical standard. Each manufacturer produces its own products according to its own standards. It is difficult for them to be common to each other. In addition, LED street lamps have multiple chips. The characteristics of the assembly work make the chip and the lamp bundled together, which is difficult to maintain, and the original product must be used for maintenance. Due to the unification of technical standards, high-pressure sodium lamps are more versatile in terms of lamps, light sources, and electrical appliances. The products between different manufacturers can be used interchangeably. This is very important from the perspective of maintenance. Maintenance is for street lamp management units. It is also the top priority. Only in this way can the maintenance of the extinguished street lamps be performed in a timely manner to ensure a high lighting rate (the most important item in the assessment of street lamp management by higher authorities), and at the same time greatly reduce the maintenance costs. It can be said that in the current development situation, LED street lights cannot be maintained. Once a failure occurs, only the entire lamp can be replaced. In addition to the high cost, the maintenance time must be greatly extended, which is very important for the user. Adverse. LED lighting is a developing technology, its light efficiency is constantly improving, and its cost is declining. However, it is not the time to replace the traditional high-pressure sodium lamp as street lighting. Therefore, the “Eleventh Five-Year City Green†issued by the Ministry of Construction Policy documents such as "Outline of Lighting Project Planning", "Urban Implementation Rules for the Implementation of the" Eleventh Five-Year Plan for Urban Green Lighting Project "of the Urban Road Lighting Professional Committee, and other policy documents specify that energy-saving light sources for street lamps are mainly high-pressure sodium lamps, and LEDs are recommended for urban landscape lighting Medium application. Membrane Switch,Membrane Keypad Switch,Customized Membrane Switch,Custom Membrane Switch CIXI MEMBRANE SWITCH FACTORY , https://www.cnjunma.com