Average and Minimum Maintained Illuminance Levels on Road Surfaces: Standards & Best Practices
Discover the standard illuminance levels required for road lighting, including average and minimum maintained lux values. Learn how they affect safety, visibility, and solar street light design.
Illuminance levels are a key factor in road safety, driver visibility, and overall lighting system performance. In the field of solar-powered street lighting, understanding average and minimum maintained illuminance levels helps engineers, developers, and city planners meet international safety standards and ensure energy-efficient lighting designs.
What Is Illuminance?
Illuminance is the amount of light (measured in lux) that falls on a surface. In road lighting, it refers to how brightly the road is lit, affecting visibility for vehicles, cyclists, and pedestrians.
Standard Illuminance Values for Road Lighting
International lighting standards such as EN 13201 (Europe) and IES RP-8 (North America) define recommended illuminance levels based on road type, traffic volume, vehicle speed, and pedestrian activity.
| Road Type | Average Illuminance (Eavg) | Minimum Illuminance (Emin) | Uniformity (Emin / Eavg) |
|---|---|---|---|
| Expressways / Major Roads | 20–30 lux | ≥ 7.5 lux | ≥ 0.25 |
| Collector Roads / Suburban Roads | 10–20 lux | ≥ 5 lux | ≥ 0.3 |
| Residential Streets / Local Roads | 5–10 lux | ≥ 2 lux | ≥ 0.35 |
| Pedestrian / Bicycle Paths | 2–5 lux | ≥ 1 lux | ≥ 0.4 |
Note: Exact requirements may vary depending on local standards and lighting classes (e.g., ME1–ME6 in EN 13201).
Why Are Maintained Illuminance Levels Important?
“Maintained” illuminance refers to the lighting level remaining after depreciation from factors like aging, dust, and dirt. Designing for these levels ensures consistent safety and visibility throughout the system’s lifecycle.
How Queneng Ensures Compliance with Lighting Standards
GuangDong Queneng Lighting Technology Co., Ltd. delivers solar street lighting solutions that comply with global standards. We provide:
- ✅ Customized lighting simulations based on road width, pole height, and traffic level
- ✅ High-efficiency LED optics for wide and even light distribution
- ✅ Long-lasting brightness using LM-80 certified LEDs and smart dimming
- ✅ Engineering support for photometric design and system optimization
Frequently Asked Questions (FAQ)
- Q1: What is the difference between average and minimum illuminance?
- A1: Average illuminance is the mean value across the entire surface, while minimum illuminance refers to the darkest measured point.
- Q2: Why is lighting uniformity important?
- A2: High uniformity reduces dark patches and glare, enhancing visibility and visual comfort.
- Q3: Can solar street lights meet these illuminance levels?
- A3: Yes. With proper design, solar lights from Queneng can meet or exceed EN 13201 and IES RP-8 standards.
- Q4: What factors affect road surface illuminance?
- A4: Key factors include pole height, lamp wattage, lens optics, pole spacing, and the road surface reflectance.
- Q5: How often should road lighting be audited?
- A5: Every 2–3 years, or when structural or environmental changes (like tree growth) occur near the lighting area.
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Conclusion
Understanding average and minimum maintained illuminance is critical to designing safe and efficient lighting systems. At GuangDong Queneng Lighting Technology Co., Ltd., we deliver smart solar lighting solutions that ensure proper lighting levels in compliance with international standards.
For custom lighting designs, simulation support, or project consultation, contact our team today.
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FAQ
Solar Street Light Luxian
How do Luxian solar street lights contribute to reducing carbon emissions?
By using solar power as their energy source, Luxian solar street lights reduce reliance on fossil fuels for electricity generation. This contributes to lower carbon emissions, helping mitigate climate change and promoting environmental sustainability. Their energy efficiency further reduces the overall carbon footprint of lighting systems.
Remote Areas Rural Development
Can solar streetlights integrate with smart technologies like remote monitoring?
Yes, our systems can include IoT features for real-time monitoring and control.
Batteries and the environment
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Battery Performance and Testing
What are the battery safety test items?
2) Overcharge and over-discharge test
3) Withstand voltage test
4) Impact test
5) Vibration test
6) Heating test
7) Fire test
9) Temperature changing cycle test
10) Trickle charging test
11) Free drop test
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13) Forced discharge test
15) Electric hot plate test
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19) Needle prick test
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Yes, solar lights come in various designs, colors, and sizes, and can be customized to match the theme or aesthetic of the resort or attraction. This makes them a versatile solution for any outdoor space.
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Do Queneng solar street lights require a power connection?
No, our solar street lights operate independently of the power grid. They rely entirely on photovoltaic panels that charge the built-in battery, making an electrical connection unnecessary.
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