Shenzhen LED street lamp test results released: face five challenges

The LED street lamp in Shenzhen electronic product quality testing center of Shenzhen city light environmental management center and the Shenzhen Municipal Science and technology and Information Bureau, jointly organized the lights and other test results have been published this month in the relevant website, a total of 27 LED lights and 3 other lights. The test time from March 2009 to July, is divided into two parts of the road test and laboratory test, road test three times, every normal switch lights, the total lighting time of about 1200 hours; laboratory test two times, 2000 hours of uninterrupted lighting.

This test does not rank, the objective is to list the technical indicators of each street lamp. However, according to some companies reflect the current online has been ranked according to the situation of this test, we do not agree with this, do not recognize the so-called ranking. In order to enable enterprises to look at this test correctly, to avoid misreading the results, we publish the results through a professional website in order to audio-visual, especially for the following:

First, this test can be seen as a result of the open LED Street free of charge, hope that through this physical examination, companies can take the initiative to identify problems, solve problems, ready for the next step of development. At the same time, companies do not extract some of the contents of the rankings, because the indicators are linked to each other, constitute a whole, after the split has no meaning.

Two, the purpose of this test is to understand the situation of LED street lighting industry, to provide a platform for enterprises to learn from each other, learn from each other. According to the current level of technology, LED is still in the street outside, common development stage, the enterprises can not cut down, the dog in the manger.

Three, the test sample is limited, the results may not reflect the true level of the enterprise. At the same time, the application area is larger, especially the road surface is wide, some street lamps in the 12m * 33m area performance is not good, does not mean that it can not be used, in the narrow road or other occasions may have better performance. Therefore, the test results must be based on the actual situation of professional and technical personnel reference.

Four, according to the technical characteristics of road lighting conditions and LED lights, road test puts forward the application of luminous flux, luminous efficiency and application of horizontal illuminance uniformity of three new evaluation indexes, the lab test extracts parameters of half peak beam great relationship with the lighting angle as the evaluation index. I hope the relevant indicators can play a role in the development, promotion and application in the days after the standard.

Five, from the test results, LED street lamp progress significantly, showing a good development prospects. The light effect is increased quickly, the highest light effect than 80Lm/W, application of the highest light effect is close to 50 Lm/W, the application of the main road is dawning; light level is greatly improved, compared with the uniformity of high pressure sodium lamp has the advantage; attenuation problem is obviously improved, compared to other light sources and inferior. However, color (light color) are exposed to the problems should be paid more attention, summed up as five challenges: acceptance, 1 LED white; 2, color comfortpoor (low color temperature is green, high temperature are offset to green purple; 3 issues) and the same type product color consistency poor; poor uniformity of 4, different color temperature; 5, temperature drift is serious. We did not consider the relevant test at the beginning of the project, found problems in testing increased the content, because the only measured 2 times, so there is no announcement about the results, but there is a problem, the problem is expected to color will be the focus of future research and application.

Six, after the end of the test, high tech Road, science and technology in the test of the three street lights will be retained, we will track the test, continue to be used in the study of LED street lamps. At the same time, consider seminars and other appropriate ways to communicate with enterprises to help enterprises improve their products.

All in all, I hope that the relevant enterprises to make good use of the test results, identify problems, solve problems, learn from each other, learn from each other, and common progress.

LED lights and other lights test results for details see appendix.