Advantages of LED Street Lights
Directional Light Emission: LEDs emit light in a specific direction, minimizing light diffusion and enhancing light efficiency.
Secondary Optical Design: LED street lights use secondary optical design to direct light precisely to required areas, improving efficiency and energy savings.
High Luminous Efficiency: LEDs have a luminous efficiency of 110-130 lm/W, with potential to reach 360 lm/W. While high-pressure sodium lamps increase efficiency with power, LED street lights generally outperform them in overall luminous efficiency.
Superior Color Rendering: LED street lamps have a color rendering index (CRI) above 75, significantly higher than the CRI of 23 in high-pressure sodium lamps. This means LEDs provide better visual clarity and brightness at lower average illuminance levels.
Low Light Decay: LEDs experience less than 3% light decay in a year, maintaining road illumination standards for up to 10 years. In contrast, high-pressure sodium lamps lose over 30% of their brightness in about a year, necessitating higher initial power for LEDs.
Energy-Saving Controls: LED street lights come with automatic control devices for dimming, time-segment control, light control, temperature control, and automatic inspection, optimizing energy use while meeting varying lighting requirements.
Long Lifespan: LEDs can last over 50,000 hours and come with a three-year quality assurance. However, the lifespan of the power supply may be a limiting factor.
High Light Efficiency: Using chips ≥100 lm/W, LED street lights save more than 75% energy compared to traditional high-pressure sodium lamps.
Easy Installation: LEDs can be installed without additional buried cables or rectifiers, and they can fit into existing lamp housings.
Excellent Heat Dissipation: LED street lights maintain temperatures below 45°C in summer, using passive heat dissipation to ensure consistent performance.
Reliable Quality: High-quality components are used in the circuits and power supplies, and each LED has separate over-current protection, reducing the risk of damage.
Uniform Light Color: LEDs provide uniform light color without additional lenses, maintaining consistent brightness and color without creating halos.
Environmentally Friendly: LEDs do not contain harmful metals like mercury, ensuring safe disposal and no environmental harm.
Combining these advantages, LED street lights offer significant energy savings, reducing electricity consumption by over 60% compared to high-pressure sodium lamps. They also have low maintenance costs, with all initial investment costs recoverable in less than six years.
