luminous efficiency

The technology is becoming increasingly mature, and high-power LED light sources can meet the needs of general street lights. The light efficiency of a typical high-pressure sodium lamp is 100LM/W, while the commonly used high-power LED is 50-60LM/W. Using foreign LED chips can achieve 80LM/W. The higher the luminous efficiency, the better the energy-saving effect. This is also one of the most important indicators for choosing LED street lamps. However, there is no clear provision for this in the LED standards, so it must be carefully confirmed when purchasing LED street lights.

Light decay

Some businesses, in order to reduce costs, use hundreds of 0.5W low-power LEDs. However, the light decay of this low-power LED is very serious, with a lifespan of only 1000 hours when the light decay reaches 80%. Therefore, as street lights that require long-term use, it is absolutely not allowed to use this type of low-power LED. Choosing high-power LED (generally referring to 30W or above) will result in much better light attenuation.

Self weight problem

Due to the high technological content and complex composition of LED street lamps, some high-power lamp holders will have a much heavier weight than ordinary high-pressure sodium lamps, so the corresponding support materials are required to be higher. However, some LED street lamp manufacturers have tried their best to reduce the self weight of LED lamp caps, from about 30 kilograms per lamp cap to over 10 kilograms. The weight reduction still has a further downward trend.

Heat dissipation

LED, as a semiconductor component, loses its illumination significance when its chip is reduced to 30% of the initial luminous flux due to temperature influence, which means its lifespan is over. In theory, the lifespan of high-power LED street lights is between 30000 to 50000 hours, but the important prerequisite is good heat dissipation. It is worth mentioning that domestic manufacturers have adopted the world's leading needle shaped heat dissipation technology.