Solar Street Light Height and Distance Spacing Calculation

Determining the installation height and spacing of solar street lights is crucial for effective illumination. Below is a comprehensive guide on height and distance calculations along with recommendations based on different scenarios.

Solar Street Light Height Calculation

The height of the lamp post should be determined based on the width of the road, the spacing of the lamps, and the road illumination standards. Generally, the height of the lamp post (H) can be initially estimated using the following empirical formula:
H = 0.5 × W + 1.5
where W is the road width (in meters). This formula is suitable for most common roads, but the specific height may need to be adjusted according to actual circumstances.

Solar Street Light Distance Calculation

The spacing of the lamp posts (S) mainly depends on the width of the road (W), the required average road illumination (E), and the total luminous flux of the light source (Φ). The calculation formula is as follows:

E = (N × Φ × U × K) / (S × W)

Where:
E is the average road illumination (in lux)
N is the lamp arrangement factor, which is 2 for relatively rectangular arrangements and 1 for single-sided and staggered arrangements
Φ is the total luminous flux of the light source (in lumens)
U is the utilization coefficient, typically ranging from 0.5 to 0.7
K is the maintenance coefficient, usually ranging from 0.7 to 0.8
S is the distance between lamp posts (in meters)
W is the road width (in meters)

Using the above formula, the lamp post spacing (S) can be derived as follows:

S = (N × Φ × U × K) / (E × W)

General Spacing Guidelines

For effective road lighting, consider the road width:

• Road Widths Up to 15 Meters:
  • Lighting is typically arranged on one side:
    • Poles shorter than 6 meters: Spacing is about 10 meters.
    • Poles taller than 6 meters: Spacing can range from 10 to 25 meters. Actual spacing should adapt to site-specific conditions.
• For Poles Over 10 Meters:The general formula is: Spacing = Pole Height × 3.

Specific Spacing Recommendations

• For an 8-Meter Pole:Spacing should be 25-30 meters, utilizing cross illumination for roads that are 10-15 meters wide.
• For a 12-Meter Pole:Longitudinal spacing should be 30-50 meters with symmetric illumination, applicable for roads wider than 15 meters.

What is the best height and Space for solar street lights

Additional Considerations

For wider roads, or where aesthetic concerns arise, staggered lighting arrangements on both sides or symmetric lighting designs can be beneficial. If installation is only feasible on one side of a wide road, consider increasing the tilt angle of the light fixtures (up to 15 degrees). Be cautious: excessive tilt can reduce luminous efficiency and increase glare.

Location-Based Recommendations

• Parks and Scenic Areas:
  • Suitable height: 7 m
  • Installation distance: 10-25 m
• National Highways:
  • Minimum height: 12 m
  • Spacing: At least 40 m
• City Side Roads:
  • Minimum height: 10 m
  • Installation distance: 30 m
• Rural Roads:
  • Minimum height: 6 m
  • Installation distance: 25-30 m (Add lights at corners to eliminate blind spots.)
• Four-Lane Roads or Main Traffic Arteries:
  • Height: 8-12 m
  • Spacing: 30-50 m with axial symmetric illumination.
• Residential Area:Light pole height: 5-7 m
  Light pole spacing: 15.4 m
• Plaza:Light pole height: 6-10 m
  Light pole spacing: 9 m

Conclusion

To achieve optimal lighting and safety, the installation height and spacing of solar street lights should be tailored to specific road conditions and requirements. Consult with engineers or lighting professionals to ensure adherence to these guidelines and to accommodate any unique site constraints. For any questions or project-specific needs, please contact us for expert advice.

Sourcing:https://luxmanlight.com/how-to-calculate-the-height-and-distance-of-solar-street-light-pole/