What Key Indicators Should You Consider When Selecting LED Streetlights?
When choosing LED streetlights, do not rely solely on wattage or price. Instead, conduct a comprehensive evaluation based on the following key indicators:
1. Luminous Efficacy (lm/W): This directly determines energy efficiency. A minimum of 130 lm/W is required, while high-quality products should reach ≥150 lm/W.
2. Light Distribution Type: Select an appropriate light distribution curve (e.g., Type II, III, IV) based on road width and pole height to ensure a rectangular light pattern and uniform illumination.
3. Correlated Color Temperature (CCT): Choose a range between 3000K and 5000K depending on the road type, and ensure a color consistency (SDCM) of ≤5.
4. Color Rendering Index (CRI): A minimum of 70 is required for main roads, while ≥80 is recommended for expressways and highways.
5. Ingress Protection (IP) Rating: At least IP65; IP66 is recommended.
6. LED Driver: Consider the brand (e.g., Meanwell, Inventronics, Philips), efficiency (≥90%), power factor (≥0.95), surge protection (differential mode 4kV; common mode 6kV or higher), and dimming interfaces (0-10V or DALI).
7. Lifespan Assurance: Require the manufacturer to provide LM-80 and TM-21 reports, with an L70 rating of ≥50,000 hours.
8. Operating Temperature Range: Must cover the local extreme temperature range (e.g., -30°C to +50°C).
9. Corrosion Resistance: For coastal or industrial areas, a salt spray test report (e.g., 500+ hours) should be provided.
10. Weight and Dimensions: Must be compatible with the load-bearing capacity of the existing light poles.
11. Warranty Period: At least 3 years for the entire fixture; 5 years is preferred.
12. Certifications: CE, RoHS, UL, DLC, CQC, etc. (depending on the target market).
13. IES Files: Data on light distribution curves used for lighting simulations.
By comprehensively evaluating these indicators, you can select products that offer excellent performance and high cost-effectiveness.
