Detailed Guide to Street Light Solutions

Did you know that street lighting can account for 10-38% of a city's total energy bill? That is a significant number that can be reduced by 50% to 80% by using the right street light solution. For example, the city of Los Angeles reduced their energy consumption of street lighting by 63% by switching to an LED-based street light solution. That is just one advantage of many benefits that modern LED-based street lights offer.

This detailed guide explores the modern and most efficient street lighting solutions designed to enhance operational efficiency, improve safety, facilitate convenient maintenance, and enhance visibility. It dives deep into their details, like design aspects and their types. Moreover, it provides a quick phase-wise guide to upgrade your existing lighting infrastructure.

What Aspects Do Street Lighting Solutions Include?

The first step is to ensure that the supplier you are about to select for the city project can provide modern features. The street light manufacturer should have a mature technology working with the following aspects:

♦ Fixtures (Luminaires)

The luminaire is the most crucial component in a streetlight solution. It requires the most attention and careful evaluation. A fixture is the complete lighting unit. Let's begin taking it apart:

● Light Source

It is the part that converts electricity into light. The traditional lighting system uses high-pressure sodium, metal halide, or fluorescent bulbs to generate light. These are inefficient (60-90 lm/W) and waste energy in the form of heat. The modern and latest light source is an LED chip. LED chips are highly efficient (≥140 lm/W) and have exceptionally long lives of 50,000 to 100,000 hours, depending on the chip manufacturer. Philips (Lumileds), Cree, and Samsung create the best LED chips. Look for lumens and efficacy of the product before purchasing.

● Housing

All the electronic components, including the LED chip, driver, control system, and wiring, are housed within the housing. The harsh weather conditions that street lights may encounter can affect the internal components if the housing doesn't provide proper protection. Therefore, it's vital to have the following features, like ingress and impact protection.

Typically, a housing with an IP66 rating has complete protection against dust and offers resistance to heavy rains and water jets. An IK10 impact rating is suitable for housing as it can withstand 20 joules of impact (equivalent to a 5 kg object dropped from 40 cm). It protects the lights from vandalism, accidental hits, and environmental stress.

● Driver

For the stability of the lighting system, drivers play a key role. Substandard drivers can cause the lights to flicker, reduce the lifespan of LEDs, and lead to fluctuations in the electrical grid. The driver must have reliability, a high power factor (PF ≥ 0.95), surge protection, and compatibility with modern smart control systems. Mean Well (MW drivers), Philips Xitanium, and Inventronics are some popular and reliable names in the driver category.

♦Poles and Mounting

The selection of pole and mounting type depends on the location where the street light is going to be installed.

Types of Poles

• Round Tapered Poles: Ideal for highways and roads, offering strong wind resistance.
• Octagonal Poles: High structural strength and mounting heights (10-14m)
• Tubular Steel Poles: Cost-effective and easy to install for rural and secondary roads.
• Decorative Poles: Ornamental tops ideal for parks, gardens, and walkways
• High Mast Poles: 20-40m height suitable for stadiums, ports, and plazas
• Solar Poles: For off-grid lighting like the CHZ solar street lights (e.g., IST9, DST2)

Mounting Styles

• Top/Side Mount (Standard): Adjustable tilt (0°–15°) to optimize light distribution
• Post-Top Mount: Used for decorative and garden lighting
• Single-Arm Bracket: Suitable for single-lane roads or pathways.
• Double-Arm Bracket: Wider roads or highways, covering both sides.
• Wall-Mounted Brackets: Fixed to a building
• High-Mast Mounting Frames: Tall poles used for airports, stadiums, and industrial areas

♦Controls and Management Systems

For city management, the ability to control the lighting system and generate reports can be a crucial aspect for gaining valuable insights. Modern LED-based lighting systems with smart controls offer the following features:

• Photocell: Lights turn on automatically at dusk and off at dawn.
• Smart Dimming: Timing-based and sensor-based dimming to reduce energy consumption
• Motion Sensors: Microwave or PIR based sensors to control light brightening or dimming.
• Solar Energy Management (MPPT Controllers): Maximum power point tracking system for charging efficiency (up to 30% higher than PWM). Longer battery times on cloudy/rainy days.
• Remote Monitoring and IoT Integration: Integration with a Smart City Platform. Also includes remote on/off, dimming, real-time monitoring of energy consumption, fault detection, and alerts.

How to Choose a Street Lighting Solution for Different Roads 

As we mentioned earlier, some of the applications of different types of lighting are. Let's discuss the details and combine all the information to provide a recommended lighting setup for a specific application.

1. Roadway Lighting

Depending on the amount of traffic at night and the type of road, the kind of LED streetlight can be easily finalized. Here are different types of roads and their lighting requirements:

• Residential Streets:
  According to the Illuminating Engineering Society (IES), Type II and Type III light distributions may be suitable for certain residential street layouts, depending on roadway width, luminaire mounting position, and pole spacing. The appropriate distribution should be verified against the project requirements and the luminaire's photometric data to ensure adequate roadway coverage and lighting uniformity. As a preliminary reference, 20–60W LED street lights mounted on 5–8 m poles may be considered for narrow residential streets and sidewalks. However, the final wattage and mounting height should be determined by road width, pole spacing, required light levels, and the luminaire’s photometric performance.
• Arterial Roads: 

  Mounting heights of 8–12 m and higher-output luminaires may be considered for wider roads with heavier traffic. The required wattage and light distribution depend on the number of lanes, road width, pole spacing, and target lighting performance. Type II, III, or IV distributions may be evaluated depending on the installation arrangement and the required lateral or forward light coverage.

• Highways: 

  For some highway projects, luminaires rated at 100W or above and mounting heights of 12–20 m may be considered as preliminary references. However, wattage alone does not determine roadway coverage. Designers should evaluate luminaire output, optical distribution, pole spacing, roadway geometry, and applicable lighting standards to achieve the required visibility and uniformity. Type IV or Type V distributions may be considered for suitable layouts, subject to verification through photometric calculations.

Recommended Product: CHZ-ST44, CHZ-IST9, CHZ-ST29 or CHZ-DST2 solar street lights

2. Pedestrian Walkways and Bicycle Paths

For pedestrian walkways and bicycle paths, lighting should provide sufficient visibility and a comfortable visual environment while minimizing glare and unnecessary light spill. Decorative post-top fixtures or single-arm pole installations with mounting heights of approximately 3–5 m may be suitable for some pathways, depending on their width, surrounding environment, and pole spacing.

Luminaires in the 20–40W range can serve as an initial reference, but the required output should be determined by the target lighting level and the fixture's optical performance. Type I or Type II distributions may be considered for narrow paths or linear layouts, depending on the mounting position and the area that needs to be illuminated. A warmer color temperature, such as 3000K–4000K, may also be considered where visual comfort and the surrounding residential environment are priorities.

The final layout should be checked for dark spots, uniformity, glare, and light spill beyond the path. This helps ensure that the lighting provides useful visibility without simply increasing brightness.

Focus on lower-intensity lighting that ensures safety without causing glare.

Recommended Product: CHZ-IST9 solar street lights or CHZ-GD30B garden lights

3. Parking Lots and Large Areas

The lighting has a lot of ground to cover. It's vital for safety and security in parking lots and large areas. Round tapered or high-mast poles, typically 8–15 m for parking areas and up to 20–30 m for vast lots. Fixtures can be mounted on single, double, or multi-arm brackets, or mast ring frames for 360° coverage. A power range of 100W to 250W+ is suitable for a parking lot. Type IV and Type V light distributions are also recommended for an even distribution and reduced dark spots.

Recommended Product: CHZ-FL27 floodlight and CHZ-FL43 stadium light

4. Architectural/Decorative Lighting

You do not need high-power LED street lights for decorative or architectural applications. A 15-50W light with Type I or Type II distribution is enough. Typically, post-top mounts or wall mounts are suitable for such applications. Narrow beam spotlights with warm color temperature can get the job done.

Recommended Product: CHZ-GD30B/GD35A garden lights

How to Determine Street Light Spacing, Mounting Height and Light Distribution

Street light spacing, mounting height, and light distribution need to be planned together. A taller pole may allow wider spacing, but the result also depends on the luminaire’s optical design, light output, installation position, and road width. The goal is to provide consistent illumination across the required area without creating dark gaps, excessive glare, or unwanted light spill.

◁ Choose Mounting Height Based on Road Width and Layout

Mounting height affects how light reaches the road surface and how widely it can be distributed. Narrow residential streets and pedestrian paths may use shorter poles, while wider roads and major routes often require taller mounting heights to cover more lanes.

Road width is only one part of the decision. Sidewalks, medians, nearby buildings, pole placement, and the luminaire’s light distribution also affect the required height. A taller pole does not automatically produce better lighting; the fixture must still deliver adequate illumination to the target area.

As a preliminary reference, the existing article lists mounting heights of 5–8 m for residential streets, 8–12 m for urban arterial roads, and 12–20 m for highways. These ranges can remain as initial planning references, but the final height should be based on the road layout, applicable lighting criteria, and photometric calculations.

◁ Estimate Pole Spacing, Then Check Uniformity

A common rule of thumb is to estimate pole spacing as approximately 2.5–3 times the mounting height. For example, if a project uses 10 m mounting heights, this approach gives an initial spacing estimate of 25–30 m. Lightmart describes this as a general guideline, not a fixed requirement for every road.

The actual spacing depends on road width, fixture output, optical distribution, pole arrangement, and required lighting performance. Excessive spacing can leave dark areas between poles, while closer spacing can increase installation costs and produce uneven brightness if the layout is poorly designed.

Pole arrangement also matters. Single-side placement may be suitable for some narrow roads; staggered placement can help distribute light across wider roads; and opposite-side placement may be considered for wider roadways. These are starting points rather than rules tied to universal road-width cutoffs. The final arrangement should be checked against the actual site geometry and lighting requirements.

◁ Match Light Distribution to Road Geometry

Light distribution determines where a luminaire directs its output. The IES Type I–V classification describes different roadway and area-light distribution patterns. In general, Type I is associated with narrow paths, Types II and III with different roadway layouts, Type IV with forward-directed distribution near an edge, and Type V with broad, multi-directional coverage. The appropriate choice depends on the fixture location and the area that needs to be illuminated.

For example, a luminaire mounted along one side of a road may need to project light across the carriageway. A fixture near a property boundary may need to limit backlight and spill onto neighboring land. For a central island or open area, a broader distribution may be more suitable.

These descriptions are general references, not fixed rules for every application. When comparing products, confirm which distribution classification is being used. IES roadway distribution types should not be confused with NEMA beam-spread classifications, which describe a different system.

◁ Verify the Layout With Photometric Data

Before finalizing a street lighting layout, use the selected luminaire’s IES or LDT photometric file in lighting design software. The model should reflect the actual road dimensions, mounting height, pole spacing, fixture orientation, and relevant project criteria. A nominal wattage or lumen rating alone cannot show whether a layout will provide adequate coverage.

Review the calculated average and minimum illuminance, lighting uniformity, glare, and light spill where applicable. Pay particular attention to the points between adjacent poles and along road edges, where insufficient coverage may occur. Increasing wattage can make areas directly below fixtures brighter without correcting low illumination between them.

For roadways that require luminance-based assessment, use the applicable roadway lighting criteria rather than relying on illuminance alone. If the results do not meet the project requirements, adjust the pole spacing, mounting height, fixture distribution, or aiming angle and run the calculation again.

The best layout is not necessarily the one with the fewest poles or the highest-output fixtures. It is the one that meets the project's lighting requirements with appropriate uniformity and controlled light spill.

What is a Smart Street Light?

Core Components of a Smart Street Light System

Smart street light systems are a combination of components that come pre-installed with the light. As a buyer, you should look for the following:

• Integrated Sensors (Proximity, Sonic, and Solar)
• Controllers
• Communication (Zigbee, LoRa, Cellular)
• Data Collection and Dispatch System

Benefits of Smart Street Light

• Cost Savings: Detailed site reports for optimizing lighting brightness or scheduling on/off times.
• Enhanced Safety and Security: Gunshot sensors and proximity sensors to enhance safety and security.
• Smart City Integration: Integration with other projects, like surveillance programs, to enhance visibility in areas of conflict.

The Process for Upgrading Existing Street Lighting

If you are in city management and aim to upgrade the current street lighting system, you can follow these broadly categorized steps as a guide. These are stages in which the project implementation can be executed. It will ensure efficiency and promising results.

Stage 1: Audit and Assessment

The first step is to analyze the existing infrastructure to determine the best approach. Answer the following questions:

• What kind of infrastructure do we currently have in place?
• Do we need new poles?
• Is there a need for electrical cable renovations?
• Are you aiming for sustainability and smart lighting systems?

Stage 2: Planning and Design

At this stage, when you have your aim set out. Start analyzing the possible solutions. Get quotations based on the specification provided. To calculate the number of luminaires needed, you must determine the total length of the area to be lit and divide it by the recommended pole spacing. Calculate the number of luminaires your project requires, consider smart integration costs, and select relevant products based on your location. Some brands, like CHz Lighting, provide an end-to-end solution, remaining in touch and assisting in every step of the process.

Stage 3: Phased Implementation

First, focus on street lighting solutions for areas with faulty lights, high traffic, or high crime rates to maximize benefits for the public. The project will have a bigger impact. After setting up the critical zones, you can begin rolling out the installation for residential areas to ensure a smoother transition. After installation, start commissioning the lighting system. Design tests to cover all the aspects of the lighting system. Ensure that the entire project is working in a well-integrated manner and according to design.

Stage 4: Ongoing Management

Finally, set up the entire streetlight solution using software. Adjust and upgrade your settings based on the feedback and data collected from on-site sensors. Use software to remotely monitor, control, and maintain the new system.

FAQ

1. How can street lighting solutions reduce light pollution?

Utilizing street lighting solutions equipped with proximity sensors and dimming options can significantly reduce lighting pollution. When there is no traffic or pedestrians, the lights would dim down and minimize light pollution. Moreover, an IESNA standard light will focus light on the ground instead of dispersing everywhere, disturbing the sleep cycle of the residential area's citizens.

2. How to calculate the brightness or lumens needed for street lighting?

You can calculate the brightness (lumens) needed for street lighting by multiplying the illuminance requirement (lux) × the area to be lit (m²), for example: If a residential street requires 10 lux and the roadway area is 200 m², then total lumens needed = 10 lux × 200 m² = 2,000 lumens.

3. Can street lights be dimmed or adjusted based on traffic?

Yes, street light solutions with proximity sensors, dimming-compatible drivers, and an LED chip can adjust brightness based on traffic levels. Lighting solutions, such as CHz IST9/DST2, can dim their brightness to 30% of their full value. It makes the system energy efficient.