street lighting design guidelines

Street Lighting Design Guidelines: Best Practices & Tips

By Matthew HernandezFebruary 18, 2026

Street lighting, an essential component of urban infrastructure, significantly impacts community safety, aesthetics, and energy consumption. Effective street lighting design is crucial to ensure well-lit roads, reduced accidents, and enhanced public spaces. This article delves into the key aspects of street lighting design guidelines, offering insights into best practices for safety, efficiency, and aesthetics.

Proper street lighting design involves a balance between illuminance and energy consumption, aiming to improve visibility without unnecessary luminosity or energy waste. Let's explore the main factors influencing street lighting design and the key considerations for each.

UnderstandingこれをIlluminance Requirements

Illuminance, measured in lux (lx), defines the amount of light on a surface. Adequate illuminance ensures safe navigation and visibility on streets. The following illuminance levels are generally recommended for different street types:

three different types of street lamps with the same light bulb on each side and one lamp in

the diagram shows how people can use light to create an outdoor space that looks like it is

Residential streets: 5-10 lx
Local streets: 10-30 lx
Arterial and collector roads: 30-50 lx

Uniform Road Surface Illumination (URSI)

Uniform Road Surface Illumination (URSI) aims to minimize glare and shadows, ensuring consistent visibility across the entire road surface. URSI techniques include placing luminaires symmetrically, using appropriate beam spread, and maintaining sufficient spacing between luminaires.

Proper URSI reduces eye strain, improves visual comfort, and enhances nighttime driving safety. Designers should strive to achieve a high URSI value (at least 0.7) for the target road surface area.

the diagram shows two different types of street lights, one with yellow light on top and one with white light on bottom

City of Los Angeles Standard Street Light - Brooks Scarpa

Glare Control and Contrast Enhancement

Glare negatively affects visibility and can lead to accidents. To control glare, designers should:

Use light distributions that minimize direct glare towards oncoming traffic
Install luminaires with a low glare rating (UGR <19)
Maintain sufficient spacing to separate luminaires and reduce clutter

Contrast enhancement, achieved through appropriate lumen and color temperature choices, helps improve visibility and perception of objects, further bolstering street safety.

Efficient Lighting Technology and Energy Management

Efficient lighting technology and energy management strategies reduce operating costs and environmental impact. Numerous innovations have emerged to improve lighting efficiency, including:

Exterior Lighting - CADdetails - CADdetails

How To Calculate No Of Street Light Poles

a drawing of the light pole with measurements

the diagram shows different types of lighting fixtures and their uses, including street lamps, lights, and other electrical equipment

a person walking down a walkway under an arch with lights on and directions to different locations

LED (Light Emitting Diodes) technology, offering superior energy efficiency, durability, and versatility. LED streetlights reduce energy consumption by 50-70% compared to traditional lights and provide better light quality with lower maintenance requirements.

Luminaire Selection and Placement

Luminaire selection involves choosing the right style, light distribution, and mounting height to achieve the desired illuminance and visual comfort. Common streetlight luminaire types include:

Cobrahead: widely used for arterial roads and highways
Ornamental: suitable for residential streets and historic districts
Shoe-lace: appropriate for narrow streets and esthetic-focused designs

Luminaire placement should be regular, symmetrical, and optimized for coverage and efficiency. Maintaining the recommended spacing and mounting height ensures even distribution of light and minimizes potential issues like overspill or glare.

a blue car driving down a street next to traffic signals and lights on the road

an architectural drawing of a city street with traffic lights and people walking on the sidewalk

A plan of action for the urban lighting of Copenhagen

an image of people walking down the street at night with trees and lights on them

the diagram shows different types of lights and fixtures for various lighting styles, from one to three

an image of street lamps and lights on the same pole, with measurements for each lamp

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an image of a street light with all its components labelled

a long pier with street lamps and lights on each side at dusk by the water

a street light sitting on the side of a road next to a tall brick building

an image of a man walking down the street in front of a lamp post and pole

four different street lamps and one lamppost with an ornament on top, the other

an image of street light plans and instructions

Controls and Automation

Lighting controls and automation systems enable dynamic adjustment of lighting levels, reducing energy consumption and enhancing flexibility. Common control options include:

Time-based controls for night and day scheduling
Occupancy-based controls using motion sensors to detect activity
Astronomical time switches for adaptation to seasonal changes

Integrating lighting controls with IoT platforms and smart city systems can offer real-time monitoring, predictive maintenance, and enhanced energy savings.

Applying these comprehensive street lighting design guidelines helps create safe, efficient, and visually appealing urban environments. By embracing best practices in illuminance, contrast, glare control, efficient technology, and smart management, town planners and engineers can greatly enhance the quality of our cities after dark.