China manufacturer of magnetic ballasts for metal halide flood lights & hps flood lights

With the development of lighting technology, the development of high power LED street lamp is very fast. In the practical application, it not only reflects the advantages, but also exposes the problems. We will be four LED street lamp manufacturers products were field trial, and the intensity of illumination, uniformity test, now the actual operation situation and the high-voltage sodium lamp are compared, and introduce the main existing problem of LED street lamp is composed of a plurality of LED light sources, LED light source and a strong directional properties, but the light source of the projection distance is limited, resulting in lamp light, between the two lights dark, uniform illumination of the poor phenomenon.

Some manufacturers of lamps used special optical lens secondary light distribution, uniformity has been greatly improved, but there are some defects and beam are projected onto the roadway, does not take into account the lamp, the sidewalks, resulting in light area basically no illumination, lighting environment ratio is poor some LED street light is only the LED light source is arranged in the traditional lamp reflector to reflect the light emitted by LED light source through the reflector, but after the actual application effect is very poor, illumination uniformity degree is extremely low. The design of this kind of lamps and lanterns product is not fully considered the optical characteristics of LED, and the use of the traditional street lamps to reduce the cost of research and development. Rarely see such products have good lighting uniformity. Therefore led light source to truly replace high pressure sodium lamp and become better than high voltage sodium lamp energy-saving green products remains to be in its own light efficiency improve, compensate for lack of light source luminous flux efficiency defects second is the efficiency of LED lamps. Some lamps and lanterns with secondary light distribution of optical lens, others use the traditional light distribution device, different light will greatly affect the lamp of the light efficiency. In addition, the IP characteristics of the lamps and lanterns efficiency has a certain impact on the efficiency of the LED driver circuit, according to the characteristics of LED light source, the LED driver circuit should be a constant current characteristics, if the driver circuit design, drive circuit itself will consume a lot of power, will make the conversion efficiency of LED light source of life up to 50000 hours, but LED street lamp is a system integration, affecting the life of many factors, such as packaging technology, LED particles combination mode, cooling mode, power supply, etc.. If the package is not good, the lamp foot contact is bad, causing the junction temperature rise, will greatly affect the lamp life of the lamp is used in the design of heat dissipation, in order to increase the heat conduction area. However, the application environment of road lighting is generally poor, and the metal surface corrosion caused by the high level of heat dissipation, long-term use, the heat dissipation is inevitable to accumulate dust, which will affect the lamp cooling, which leads to the high temperature is high, which leads to the LED street lamp using the actual life of the power supply is composed of various electronic components, the life and stability of the power supply. There is a lamp test run two months not to the test, because of damage to the drive power and turn off the lights. Therefore, the selection of reliable power supply is the key to maintain the problem.

The influence of LED street lamp has many factors, it is difficult to maintain 50000 hours without maintenance. The light source and high-pressure sodium lamp life up to 24000 hours,hps ballast life is more than 50000 hours. The structure design of LED street lamps are integrated design, both led lamp damage or power supply failure., but there is a problem must be whole demolition replacement, maintenance workload, high cost, and high pressure sodium lamp only need to change a light bulb or ignitor, maintenance work is small and low cost.