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
Public Gardens and Landscape Lighting
Are there any warranty options for solar lights?
Yes, we offer a standard 2-year warranty for all our solar lighting products. The warranty covers manufacturing defects and performance issues under normal usage. For any issues outside the warranty period, we provide repair and replacement services.
Battery and Analysis
What are the possible reasons why batteries and battery packs cannot be discharged?
2) Insufficient charging or no charging;
3) The ambient temperature is too low;
4) The discharge efficiency is low. For example, when a large current is discharged, an ordinary battery cannot discharge electricity because the internal material diffusion speed cannot keep up with the reaction speed, causing the voltage to drop sharply.
Solar Street Light Luda
What are the key benefits of using LED lights in Luda solar street lights?
LED lights used in Luda solar street lights are highly energy-efficient, providing bright illumination while using less power compared to traditional lighting solutions. LEDs also have a longer lifespan, reducing the need for frequent bulb replacements, and they generate less heat, further enhancing their energy efficiency and performance in outdoor conditions.
APMS system
How does the APMS system enhance battery life?
With its dual-system intelligent management mode, APMS reduces frequent charge-discharge cycles, optimizes energy usage, and significantly extends battery lifespan.
Solar Street Light Luyi
Are Luyi solar street lights suitable for all outdoor environments?
Yes, Luyi solar street lights are highly versatile and suitable for a wide range of outdoor environments. Whether for urban streets, rural roads, parking lots, parks, or pathways, Luyi lights provide reliable illumination in any setting. Their weatherproof and durable construction makes them ideal for harsh outdoor conditions, including extreme heat, cold, rain, and snow.
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Can the lights be customized for specific municipal projects?
Yes, we offer tailored solutions to meet the unique requirements of different projects, including variations in design, brightness, height, and operation modes.
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