What are the problems of LED street lights?
Although LED streetlights replace sodium lamp can achieve energy saving and emission reduction, compound national policy, more easily wide, but, led, etc. still exist many problems need to be solved and perfect:
The most important is the heat dissipation problem, led working state and thermal design not only directly related to the actual led luminous efficiency, but also related to the actual service life. Especially in high-power led, heat dissipation is a problem that can not be neglected, when the rise exceeds the maximum allowable temperature, led chips will be damaged by overheating. At present, in Taiwan, a light Torch technology company (Light Torch Technology), the use of loop heat pipe (LHP) cooling technology to achieve the work of LED lamp cooling, achieved good results, can reduce the junction temperature of LED lights to 65.
The second is the design of the LED street light distribution, although the comparison in the high-pressure sodium lamp distribution curve needs to be determined by the reflector, resulting in a large limitation, LED lamps using distributed light source, through the effective design of various electric light, can make the lamp source of the ideal state, to achieve a reasonable adjustment of the curve of the distribution, Control the distribution of light, in the effective range of lighting, illumination is relatively uniform. But in the practical application, the LED street lamp's illumination is too concentrated, the illumination uniformity degree is relatively still poor, has the bigger glare. To achieve the lighting effect of the road lights, we need to pass two of its light path design, and with high transmittance glass lens shield.
The most important is the heat dissipation problem, led working state and thermal design not only directly related to the actual led luminous efficiency, but also related to the actual service life. Especially in high-power led, heat dissipation is a problem that can not be neglected, when the rise exceeds the maximum allowable temperature, led chips will be damaged by overheating. At present, in Taiwan, a light Torch technology company (Light Torch Technology), the use of loop heat pipe (LHP) cooling technology to achieve the work of LED lamp cooling, achieved good results, can reduce the junction temperature of LED lights to 65.
The second is the design of the LED street light distribution, although the comparison in the high-pressure sodium lamp distribution curve needs to be determined by the reflector, resulting in a large limitation, LED lamps using distributed light source, through the effective design of various electric light, can make the lamp source of the ideal state, to achieve a reasonable adjustment of the curve of the distribution, Control the distribution of light, in the effective range of lighting, illumination is relatively uniform. But in the practical application, the LED street lamp's illumination is too concentrated, the illumination uniformity degree is relatively still poor, has the bigger glare. To achieve the lighting effect of the road lights, we need to pass two of its light path design, and with high transmittance glass lens shield.
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