In today's increasingly tight energy world, it is the […]
In today's increasingly tight energy world, it is the responsibility for each of us to save energy. In response to the call for energy saving and emission reduction, many street lamp manufacturers have replaced traditional high-pressure sodium lamps with more energy-efficient high power 200w outdoor slim led floodlight lamps in urban street lamp renovation projects. However, the current quality level of LED street lights on the market is uneven, and LED street lights in many places will not be bright. After all, the reason for this phenomenon is the poor heat dissipation performance of LED street lights. When the heat dissipation performance is poor, the internal temperature of the LED lamp will be too high. When the LED temperature rises, its junction resistance decreases, resulting in a decrease in the on-voltage. Under the same voltage condition, the increase in the temperature of the LED lamp will cause the LED current to increase. Increasing the current will further increase the temperature, which will cause an evil cycle to burn the LED chip. Moreover, the internal temperature of the LED street light fixture is too high, which also makes the LED chip light attenuation worse, so that it will soon lead to the phenomenon of no light. So what causes the poor heat dissipation performance of LED street lights?
First, the quality of LED street lights
The adopted LED chip has poor thermal conductivity, and the temperature of the LED die cannot be transmitted to the surface (internal heat and external coolness). Even if a heat sink is added, the internal heat cannot be dissipated, and then there is no heat sink inside some LED street lights...
Second, the temperature rise caused by the LED street light power supply
The quality of the LED street light power supply is not good. When the LED is on, the non-linearity of the power supply and weak changes in the power supply will cause the current through the LED chip to increase, which will cause the internal temperature to be too high and affect the heat dissipation performance of the LED street light.
In summary, the main reason for the poor heat dissipation performance of LED street lights are the quality of the LED chip and the driving power. Therefore, for our buyers, when purchasing LED street lights, we must emphasize with the street light manufacturers to choose high-quality LED chips and power supplies, and not be cheap. After all, high-quality products are definitely not cheap. There is a problem.