After using solar LED street lights, many consumers have reported that these lights experience brightness degradation after a period of time. Today, we will discuss the factors that contribute to the light degradation of solar LED street lights.
Temperature is a key reason for the brightness degradation of solar LED street lights, and these lights are particularly vulnerable to this issue. It is well known that the luminous power of solar LED street lights is greater than that of household lighting fixtures. Therefore, manufacturers of solar LED street lights invest significant effort in the design of heat dissipation fins and modules. Once assembled, protective paint is applied to the heat dissipation module to prevent weather damage. Unexpectedly, this external protective paint can trap heat within the heat dissipation module, leading to poor heat dissipation, which in turn causes LED chip brightness degradation.
The luminous heat energy of LED chips is concentrated over a small area. In high-power street lighting applications, the input power is also significant, resulting in high interface temperatures for the LEDs. If the heat dissipation module cannot effectively dissipate heat during prolonged operation, it will affect the lifespan and brightness performance of the LEDs. Solar LED street lights are used outdoors and are affected by environmental climatic factors. Therefore, most manufacturers protect the outer casing of the solar LED street light using anodic treatment or apply a layer of protective paint to prevent corrosion from acidic and alkaline substances.
The lifespan of anodic treatment is not long, and over time, it will oxidize and change color. If disassembly and rework are required, it is not only time-consuming but will also increase maintenance costs. While the cost of paint protection is relatively low and provides good protective benefits, standard paint does not have heat dissipation capabilities. The paint itself forms a barrier, effectively increasing the thermal resistance of the solar LED street light’s heat dissipation module. This does not help the situation, but rather traps heat within the heat dissipation module, causing a reduction in LED luminous power and leading to severe brightness degradation over time.
Manufacturers engaged in the production and sale of solar LED street lights have years of experience and advanced production equipment. They provide quality assurance, reasonable pricing, and configurations. If you are interested in purchasing solar LED street lights or have inquiries about solar LED street light pricing, please feel free to reach out.
