Sansi LED: Sustainable LED Lighting and Integrated LED Display

With the acceleration of urbanization, LED streetlights have gradually become an important choice for modern lighting due to their advantages of low energy consumption, long lifespan, and high luminous efficacy. To ensure the normal operation of LED streetlights, the choice of power supply is particularly important. LED streetlight power supplies can be mainly classified by operating characteristics, conversion methods, and environmental adaptability.

By operating characteristics, they can be categorized as constant current power supplies or constant voltage power supplies. Constant current power supplies provide a stable output current, suitable for applications requiring precise control of luminous flux, and are widely used in high-power LED streetlights to maintain consistent light output and ensure stable brightness. Constant voltage power supplies maintain a stable voltage output, suitable for applications with multiple LEDs in series, mainly used in simpler LED streetlight designs to prevent light decay caused by current fluctuations.

By power conversion method, switching power supplies and linear power supplies are the main choices. Switching power supplies are widely adopted due to their high efficiency and small size. They convert the input voltage to the required output voltage or current through high-frequency switching, with a conversion efficiency generally above 85%, suitable for operation under various environmental conditions. Linear power supplies adjust the input voltage through electronic components to output a stable voltage. While simpler in circuit design, they are less efficient and generate more heat, suitable for low-power applications with high power supply quality requirements. In terms of environmental adaptability, indoor power supplies are typically used for indoor LED fixtures where the environment is relatively stable and the power supply's heat dissipation and protection requirements are lower. Outdoor power supplies, however, need to have a certain degree of waterproof, dustproof, and shockproof capabilities, usually requiring an IP65 or higher protection rating.

Choosing a suitable LED streetlight power supply requires considering multiple factors, including the installation environment, the characteristics of the LED fixture, and usage requirements. For city road lighting, higher illumination brightness and stable luminous efficacy are usually required, recommending the use of constant current switching power supplies. These power supplies provide a stable current output, ensuring the performance of LED fixtures under various climatic conditions. Furthermore, the selected power supply needs good protection capabilities to adapt to outdoor environments.  Residential areas and commercial districts usually require aesthetically pleasing and safe lighting effects, making constant voltage switching power supplies suitable, facilitating the series installation of multiple fixtures. Considering the sensitivity of commercial areas to lighting effects, power supplies with dimming functions are particularly ideal.

In parking lots and industrial areas, due to longer nighttime lighting periods, the durability and stability of the power supply are crucial. Therefore, high-efficiency switching power supplies with effective heat dissipation and overload protection are recommended to extend service life. For LED streetlights in remote areas with unstable power supplies, renewable energy sources like solar power may be a good option. The chosen power supply should have a good charge management system and high environmental adaptability.

LED streetlights have enormous application potential, and the choice of power supply largely determines the performance and stability of the fixtures. Understanding the different classifications and characteristics of LED streetlight power supplies and making rational choices based on specific application scenarios can maximize lighting efficiency and reduce energy costs.