Street Light Controllers

Street Light Controllers Market Outlook

The global street light controllers market is projected to reach approximately USD 4.5 billion by 2035, growing at a CAGR of around 15.2% from 2025 to 2035. This growth can be attributed to the increasing need for energy-efficient lighting solutions, urbanization, and the adoption of smart city initiatives worldwide. The growing emphasis on reducing carbon footprints in urban areas is pushing municipalities and governments to upgrade traditional street lighting systems with advanced controllers that enable better management and optimization of energy usage. Moreover, the proliferation of IoT technologies is facilitating the development of smart street light controllers, which are increasingly being incorporated in modern urban infrastructure. As cities evolve into smart environments, the demand for sophisticated lighting systems that can be monitored and managed remotely will continue to rise, further propelling market growth.

Growth Factor of the Market

The street light controllers market is experiencing robust growth driven by several factors. The global shift towards smart city initiatives and energy-efficient solutions is one of the major contributors to this growth. As urban centers expand, the need for effective street lighting becomes more critical to ensure safety and visibility during nighttime. Additionally, the increasing adoption of renewable energy sources, including solar-powered street lighting systems, is driving demand for advanced street light controllers that can optimize energy consumption. The integration of IoT technologies in street lighting allows for better control, monitoring, and data collection, which enhances efficiency and operational savings. Furthermore, government regulations aimed at reducing energy consumption and promoting sustainable practices are encouraging the installation of state-of-the-art street light controllers. Lastly, rising investments in urban infrastructure development and smart city projects worldwide are expected to create significant opportunities for market players.

Key Highlights of the Market

• The market is expected to witness a CAGR of 15.2% from 2025 to 2035.
• Smart Controllers are anticipated to dominate the market due to their advanced features and energy-saving capabilities.
• North America holds a significant share of the market, driven by early adoption of smart lighting technologies.
• Wireless Controllers are gaining popularity due to ease of installation and flexibility.
• The increasing adoption of solar-powered street lighting systems is expected to create new opportunities in the market.

By Product Type

Centralized Controllers:

Centralized controllers are increasingly becoming a popular choice in the street light controllers market due to their ability to manage multiple lighting fixtures from a single location. These controllers enable city planners and municipalities to monitor and control street lighting systematically, providing functionalities such as real-time data analysis, energy consumption tracking, and scheduling adjustments. The centralized approach allows for efficient management of power usage and can lead to significant cost savings over time. Additionally, centralized controllers often include advanced features like remote diagnostics and fault detection, further enhancing maintenance efficiency. As urban areas strive for smarter infrastructure, the demand for centralized controllers continues to rise, driven by the need for comprehensive street light management systems that can adapt to changing conditions and requirements.

Decentralized Controllers:

Decentralized controllers offer a flexible alternative to centralized systems and are particularly suitable for areas where independent control of street lights is desired. This type of controller allows each lighting fixture to operate autonomously, reducing the reliance on a central system for operation. The advantage of decentralized controllers lies in their resilience; if one controller fails, the others continue to function independently, minimizing disruptions. Additionally, these controllers can be integrated with local sensor technologies, enabling adaptive lighting based on environmental conditions such as pedestrian traffic levels or weather changes. As municipalities seek to enhance public safety and energy efficiency, decentralized controllers are becoming an attractive option for new installations and upgrades, contributing to the diversified growth of the market.

Smart Controllers:

Smart controllers represent the cutting edge of street light technology, featuring integration with IoT systems that allow for advanced connectivity and data analytics. These controllers enable real-time monitoring and management of street lights, facilitating functionalities such as dimming, scheduling, and adaptive lighting based on traffic patterns or ambient light levels. Smart controllers are also capable of communicating with other smart city infrastructures, creating a cohesive network that enhances urban management. The growing trend toward sustainable urban development and smart city initiatives is bolstering the adoption of smart controllers, as they not only promote energy efficiency but also contribute to improved public safety and operational transparency. As the technology evolves, the functionality of smart controllers is expected to expand, further driving their market presence.

Timer-Based Controllers:

Timer-based controllers are a traditional yet effective solution for street lighting management. These controllers operate on preset schedules to turn lights on and off at specific times, reducing energy consumption during hours when lighting is unnecessary. Despite being less sophisticated than smart or centralized controllers, timer-based systems provide a cost-effective solution for many municipalities, especially in areas with lower lighting demands. Their ease of installation and straightforward operation make them appealing for regions with limited budgets for advanced technologies. While timer-based controllers may not offer real-time monitoring or adaptability, they serve as a foundation for municipalities looking to upgrade to more advanced systems in the future, ensuring their continued relevance in the market.

Dimming Controllers:

Dimming controllers are geared towards enhancing energy efficiency and prolonging the lifespan of street lighting fixtures by automatically adjusting light intensity based on predetermined criteria, such as traffic flow or ambient light levels. These controllers help optimize electricity consumption without sacrificing the safety and visibility that street lighting provides. The ability to dim lights during low-traffic hours not only leads to cost savings but also aligns with sustainable practices by reducing light pollution. Municipalities and urban planners are increasingly recognizing the benefits of dimming controllers as part of a comprehensive street lighting strategy, particularly in densely populated areas where energy conservation is critical. As the focus on energy efficiency intensifies, the adoption of dimming controllers is expected to grow significantly, contributing to the overall development of the street light controllers market.

By Application

Highways:

Highways require specialized street lighting solutions to ensure safety and visibility for high-speed traffic. The application of street light controllers in highway settings focuses on providing adequate illumination while minimizing energy consumption. Highways benefit from centralized and smart controllers that can manage lighting levels based on real-time traffic data, adapting to varying conditions throughout the day and night. Furthermore, the integration of advanced features like fault detection and automated dimming based on traffic flow enhances the operational efficiency of highway lighting systems. As traffic volumes continue to rise globally, the demand for sophisticated highway lighting solutions is expected to drive the growth of street light controllers tailored for this application.

Streets:

Street lighting plays a crucial role in urban environments, ensuring safety and enhancing the quality of life for residents and pedestrians. Street light controllers are essential in this application, allowing for the effective management of lighting levels based on time, season, and pedestrian activity. Features such as smart sensors enable adaptive lighting that adjusts according to real-time data, improving safety while reducing energy waste. Additionally, the incorporation of wireless connectivity in street light controllers facilitates remote management and monitoring, which is valuable for municipalities aiming to maintain efficient and responsive street lighting systems. As cities continue to embrace smart technology, the demand for innovative street lighting solutions is anticipated to grow significantly, propelling the market for street light controllers.

Public Parks:

Public parks require specific lighting solutions to enhance safety and aesthetics while promoting environmental stewardship. Street light controllers deployed in parks focus on illuminating pathways and gathering areas without causing excessive light pollution. Smart controllers are increasingly being utilized in these settings to create a balance between safety, energy efficiency, and environmental awareness. Features such as motion sensors can automatically activate lighting when visitors are present and dim them when the area is empty, optimizing energy usage. As parks evolve into multi-functional spaces that host various activities, the demand for adaptable and aesthetically pleasing lighting solutions is expected to drive the growth of street light controllers designed for public parks.

Commercial Areas:

Commercial areas are characterized by high pedestrian traffic and a need for effective street lighting to ensure customer safety and enhance the shopping experience. Street light controllers in these environments must be versatile, providing adequate illumination while also being energy efficient. Smart controllers play a pivotal role in this application, allowing for real-time adjustments based on foot traffic and time of day. Moreover, the integration of smart technologies enables businesses to monitor energy consumption and reduce costs, making them an attractive investment. As commercial spaces increasingly adopt sustainable practices and seek to enhance customer experiences, the demand for advanced street light controllers is projected to rise, contributing to the overall market growth.

Industrial Areas:

Industrial areas have distinct lighting requirements that prioritize safety and security, necessitating robust street light controllers that can accommodate harsh operating conditions. Street lighting in these regions must ensure constant visibility while managing energy consumption effectively. Centralized and smart controllers are commonly utilized in industrial settings for their ability to control multiple fixtures remotely and provide detailed data on energy usage and maintenance needs. The push for sustainability in industrial operations is driving the demand for energy-efficient lighting solutions, further propelling the adoption of advanced street light controllers. As industrial areas evolve, the emphasis on effective lighting management will continue to drive innovations, shaping the future of the street light controllers market.

By Distribution Channel

Online Stores:

Online stores have emerged as a significant distribution channel for street light controllers, offering convenience and a wide product range for customers. The growth of e-commerce has enabled manufacturers to reach a broader audience, allowing end-users to compare products, read reviews, and make informed purchasing decisions from the comfort of their homes or offices. Moreover, online platforms often provide competitive pricing and promotional offers that attract budget-conscious buyers. As technological advancements and internet penetration continue to rise globally, the reliance on online stores for procuring street light controllers is expected to grow, influencing market dynamics positively.

Electrical Wholesalers:

Electrical wholesalers play a crucial role in the distribution of street light controllers, serving as intermediaries between manufacturers and end-users. These wholesalers typically maintain large inventories of various lighting solutions, facilitating quicker access for contractors and municipalities seeking to upgrade or install street lighting systems. The advantage of working with electrical wholesalers includes expert consultations and availability of complementary products, which allows for comprehensive lighting solutions. As urban development projects expand and municipalities invest in upgrading their infrastructure, the significance of electrical wholesalers in the street light controllers market remains strong, driving ongoing demand.

Direct Sales:

Direct sales channels enable manufacturers to build strong relationships with end-users, providing tailored solutions that meet specific project needs. This approach often involves direct interaction with municipal authorities, contractors, and business owners, facilitating better understanding of their requirements and preferences. Additionally, direct sales can lead to customized offerings, allowing manufacturers to showcase advanced features and benefits of their street light controllers effectively. As more companies recognize the value of direct engagement in fostering client relationships, the direct sales channel is expected to remain an essential component of the street light controllers market.

Distributors:

Distributors are essential in managing the logistics and supply chains for street light controllers, bridging the gap between manufacturers and end-users. They handle inventory management, pricing strategies, and customer outreach, ensuring that products are readily available in various regions. Distributors often provide expertise in product selection and application, assisting clients in choosing the right solutions for their specific needs. As the demand for street light controllers grows, the role of distributors in facilitating efficient supply chains and ensuring product availability is vital for market success, leading to continued collaboration between manufacturers and distributors.

Retail Stores:

Retail stores continue to serve as traditional yet effective distribution channels for street light controllers, providing customers the opportunity to view products in person before making a purchase. These outlets often cater to local contractors, municipalities, and DIY enthusiasts who prefer direct interaction with sales personnel for product advice and support. Additionally, retail stores can offer immediate access to various lighting solutions, which is advantageous for urgent applications or projects. As the trend toward energy-efficient solutions grows, retail stores can play a significant role in promoting street light controllers by educating customers on their benefits and functionalities, thereby driving market growth.

By Connectivity Type

Wired Controllers:

Wired controllers have been a standard in the street light controllers market, providing a reliable and stable connection for street lighting systems. These controllers utilize hardwired connections to manage lighting fixtures, ensuring consistent performance without the risk of signal interference often associated with wireless options. Wired systems are particularly suitable for applications where infrastructure is already in place, offering a straightforward upgrade path to modern lighting solutions. Despite the increasing popularity of wireless technologies, wired controllers remain relevant due to their robustness and reliability, especially in areas where connectivity is a primary concern.

Wireless Controllers:

Wireless controllers are gaining traction in the street light controllers market, providing flexible and scalable solutions for modern urban infrastructure. These controllers utilize wireless communication protocols to manage street lighting systems, allowing for easier installation and the ability to adapt to changing urban environments. The benefits of wireless controllers include reduced installation time, lower labor costs, and the ability to integrate with other smart city technologies. As municipalities increasingly embrace smart city initiatives and the Internet of Things (IoT), the adoption of wireless controllers is expected to accelerate, further transforming the street light controllers landscape.

By Region

North America holds a substantial share of the street light controllers market, driven primarily by the early adoption of smart technologies and government initiatives aimed at modernizing urban infrastructure. The region’s focus on reducing energy consumption and enhancing public safety has led to increased investments in advanced street light control systems. As urban areas continue to expand, the demand for reliable and efficient street lighting solutions is expected to grow, fueling market growth. The North American segment is projected to experience a CAGR of approximately 14% over the forecast period, reflecting a strong commitment to sustainable urban development and smart city projects.

Europe also represents a significant portion of the street light controllers market, characterized by stringent regulations aimed at minimizing energy usage and promoting sustainability. Countries in this region are increasingly investing in smart street lighting solutions to improve urban environments and reduce carbon emissions. The adoption of intelligent lighting systems that provide real-time monitoring and energy optimization is on the rise, contributing positively to market dynamics. As European cities move toward smarter infrastructures, the demand for street light controllers is expected to grow, reinforcing the region's position in the global market.

Opportunities

The street light controllers market is poised to benefit from numerous growth opportunities as urbanization continues to rise globally. One of the most significant opportunities lies in the increasing investment in smart city initiatives, which prioritize the integration of advanced technologies in urban environments. As governments and municipalities allocate budgets for upgrading lighting infrastructure, the demand for innovative street light controllers that offer features such as remote monitoring, energy efficiency, and adaptability is expected to surge. Furthermore, the growing emphasis on sustainability and reducing carbon footprints will drive the adoption of energy-efficient lighting solutions, including solar-powered street light controllers. This transition toward greener technologies will not only enhance public safety but also contribute to the overall quality of urban living, presenting a favorable market environment for manufacturers and solution providers.

Another promising opportunity in the street light controllers market lies in the development of IoT-enabled systems that allow for enhanced connectivity and data analytics. The integration of sensors and communication technologies into street lighting systems enables municipalities to collect valuable data on traffic flow, pedestrian activity, and environmental conditions. This data can be utilized to optimize lighting levels dynamically and improve operational efficiency. As cities seek to become more data-driven in their decision-making processes, the demand for smart street light controllers capable of harnessing real-time information will grow significantly. Additionally, partnerships between technology providers and municipal authorities can yield collaborative projects aimed at improving urban infrastructure, creating a win-win scenario for all stakeholders involved.

Threats

Despite the promising growth trajectory, the street light controllers market faces several threats that could impact its expansion. One of the primary challenges is the high initial investment associated with upgrading to advanced street lighting systems. Many municipalities operate on tight budgets and may hesitate to invest in new technologies, particularly when traditional systems are still functional. This reluctance to invest can hinder the adoption of innovative street light controllers, limiting market growth. Additionally, the integration of new technologies into existing infrastructure may pose technical challenges and require specialized skills, which can further complicate the transition process for cities. As a result, market players must navigate the complexities of cost, integration, and skill availability to successfully penetrate the market.

Moreover, the rapid pace of technological advancement presents a double-edged sword for street light controller manufacturers. While it creates opportunities for innovation, it also increases competition, as new entrants continuously emerge with advanced solutions. Established companies may find it challenging to keep pace with evolving technologies and meet changing customer expectations. Additionally, cybersecurity concerns associated with IoT-enabled street light controllers can pose a significant threat, as vulnerabilities in connected systems can lead to data breaches and unauthorized access. As the market becomes more interconnected, ensuring the security of street light control systems will be critical for maintaining trust among customers and stakeholders alike.

Competitor Outlook

• Schneider Electric
• Philips Lighting (Signify)
• General Electric (GE) Lighting
• Osram Licht AG
• Honeywell International Inc.
• Siemens AG
• Streetlight.Vision
• Fluence Bioengineering, Inc.
• Dialight
• RAB Lighting
• Acuity Brands, Inc.
• Legrand
• Urban Solar
• Royal Philips NV
• Trilliant Networks

The competitive landscape of the street light controllers market is characterized by a mix of established players and emerging startups, all vying for market share in a rapidly evolving environment. Major companies like Schneider Electric and Philips Lighting (Signify) have positioned themselves as leaders by offering comprehensive lighting solutions that incorporate advanced street light controllers. These companies invest heavily in research and development to innovate and enhance the functionalities of their products, ensuring they stay ahead of the competition. Moreover, partnerships with local governments and municipalities allow these market leaders to implement large-scale projects, reinforcing their market presence and reputation.

Emerging companies in the street light controllers market are leveraging advancements in technology to introduce cutting-edge solutions that cater to the growing demand for smart city applications. For instance, firms like Streetlight.Vision and Urban Solar are focused on developing IoT-enabled street light controllers that facilitate real-time monitoring and energy optimization. Their innovative approaches appeal to municipalities seeking to modernize their street lighting systems while enhancing sustainability. These new entrants often emphasize flexibility and user-friendliness, enabling them to capture niche segments within the market that traditional players may overlook.

Key players such as General Electric (GE) Lighting and Siemens AG bring extensive experience and expertise in the field, allowing them to develop robust street light control systems that meet diverse customer needs. These companies focus on leveraging their existing relationships with contractors and municipalities to promote their street light controllers, often combining traditional lighting solutions with cutting-edge technology to provide comprehensive products. As the market evolves, collaboration and strategic alliances among players will likely intensify, enabling companies to expand their offerings and enhance their competitive edge in the street light controllers market.

• 1 Appendix

  • 1.1 List of Tables
  • 1.2 List of Figures

• 2 Introduction

  • 2.1 Market Definition
  • 2.2 Scope of the Report
  • 2.3 Study Assumptions
  • 2.4 Base Currency & Forecast Periods

• 3 Market Dynamics

  • 3.1 Market Growth Factors
  • 3.2 Economic & Global Events
  • 3.3 Innovation Trends
  • 3.4 Supply Chain Analysis

• 4 Consumer Behavior

  • 4.1 Market Trends
  • 4.2 Pricing Analysis
  • 4.3 Buyer Insights

• 5 Key Player Profiles

  • 5.1 Legrand
    • 5.1.1 Business Overview
    • 5.1.2 Products & Services
    • 5.1.3 Financials
    • 5.1.4 Recent Developments
    • 5.1.5 SWOT Analysis
  • 5.2 Dialight
    • 5.2.1 Business Overview
    • 5.2.2 Products & Services
    • 5.2.3 Financials
    • 5.2.4 Recent Developments
    • 5.2.5 SWOT Analysis
  • 5.3 Siemens AG
    • 5.3.1 Business Overview
    • 5.3.2 Products & Services
    • 5.3.3 Financials
    • 5.3.4 Recent Developments
    • 5.3.5 SWOT Analysis
  • 5.4 Urban Solar
    • 5.4.1 Business Overview
    • 5.4.2 Products & Services
    • 5.4.3 Financials
    • 5.4.4 Recent Developments
    • 5.4.5 SWOT Analysis
  • 5.5 RAB Lighting
    • 5.5.1 Business Overview
    • 5.5.2 Products & Services
    • 5.5.3 Financials
    • 5.5.4 Recent Developments
    • 5.5.5 SWOT Analysis
  • 5.6 Osram Licht AG
    • 5.6.1 Business Overview
    • 5.6.2 Products & Services
    • 5.6.3 Financials
    • 5.6.4 Recent Developments
    • 5.6.5 SWOT Analysis
  • 5.7 Royal Philips NV
    • 5.7.1 Business Overview
    • 5.7.2 Products & Services
    • 5.7.3 Financials
    • 5.7.4 Recent Developments
    • 5.7.5 SWOT Analysis
  • 5.8 Schneider Electric
    • 5.8.1 Business Overview
    • 5.8.2 Products & Services
    • 5.8.3 Financials
    • 5.8.4 Recent Developments
    • 5.8.5 SWOT Analysis
  • 5.9 Streetlight.Vision
    • 5.9.1 Business Overview
    • 5.9.2 Products & Services
    • 5.9.3 Financials
    • 5.9.4 Recent Developments
    • 5.9.5 SWOT Analysis
  • 5.10 Trilliant Networks
    • 5.10.1 Business Overview
    • 5.10.2 Products & Services
    • 5.10.3 Financials
    • 5.10.4 Recent Developments
    • 5.10.5 SWOT Analysis
  • 5.11 Acuity Brands, Inc.
    • 5.11.1 Business Overview
    • 5.11.2 Products & Services
    • 5.11.3 Financials
    • 5.11.4 Recent Developments
    • 5.11.5 SWOT Analysis
  • 5.12 Philips Lighting (Signify)
    • 5.12.1 Business Overview
    • 5.12.2 Products & Services
    • 5.12.3 Financials
    • 5.12.4 Recent Developments
    • 5.12.5 SWOT Analysis
  • 5.13 Fluence Bioengineering, Inc.
    • 5.13.1 Business Overview
    • 5.13.2 Products & Services
    • 5.13.3 Financials
    • 5.13.4 Recent Developments
    • 5.13.5 SWOT Analysis
  • 5.14 Honeywell International Inc.
    • 5.14.1 Business Overview
    • 5.14.2 Products & Services
    • 5.14.3 Financials
    • 5.14.4 Recent Developments
    • 5.14.5 SWOT Analysis
  • 5.15 General Electric (GE) Lighting
    • 5.15.1 Business Overview
    • 5.15.2 Products & Services
    • 5.15.3 Financials
    • 5.15.4 Recent Developments
    • 5.15.5 SWOT Analysis

• 6 Market Segmentation

  • 6.1 Street Light Controllers Market, By Application
    • 6.1.1 Highways
    • 6.1.2 Streets
    • 6.1.3 Public Parks
    • 6.1.4 Commercial Areas
    • 6.1.5 Industrial Areas
  • 6.2 Street Light Controllers Market, By Product Type
    • 6.2.1 Centralized Controllers
    • 6.2.2 Decentralized Controllers
    • 6.2.3 Smart Controllers
    • 6.2.4 Timer-Based Controllers
    • 6.2.5 Dimming Controllers
  • 6.3 Street Light Controllers Market, By Connectivity Type
    • 6.3.1 Wired Controllers
    • 6.3.2 Wireless Controllers
  • 6.4 Street Light Controllers Market, By Distribution Channel
    • 6.4.1 Online Stores
    • 6.4.2 Electrical Wholesalers
    • 6.4.3 Direct Sales
    • 6.4.4 Distributors
    • 6.4.5 Retail Stores

• 7 Competitive Analysis

  • 7.1 Key Player Comparison
  • 7.2 Market Share Analysis
  • 7.3 Investment Trends
  • 7.4 SWOT Analysis

• 8 Research Methodology

  • 8.1 Analysis Design
  • 8.2 Research Phases
  • 8.3 Study Timeline

• 9 Future Market Outlook

  • 9.1 Growth Forecast
  • 9.2 Market Evolution

• 10 Geographical Overview

  • 10.1 Europe - Market Analysis
    • 10.1.1 By Country
      • 10.1.1.1 UK
      • 10.1.1.2 France
      • 10.1.1.3 Germany
      • 10.1.1.4 Spain
      • 10.1.1.5 Italy
  • 10.2 Asia Pacific - Market Analysis
    • 10.2.1 By Country
      • 10.2.1.1 India
      • 10.2.1.2 China
      • 10.2.1.3 Japan
      • 10.2.1.4 South Korea
  • 10.3 Latin America - Market Analysis
    • 10.3.1 By Country
      • 10.3.1.1 Brazil
      • 10.3.1.2 Argentina
      • 10.3.1.3 Mexico
  • 10.4 North America - Market Analysis
    • 10.4.1 By Country
      • 10.4.1.1 USA
      • 10.4.1.2 Canada
  • 10.5 Middle East & Africa - Market Analysis
    • 10.5.1 By Country
      • 10.5.1.1 Middle East
      • 10.5.1.2 Africa
  • 10.6 Street Light Controllers Market by Region

• 11 Global Economic Factors

  • 11.1 Inflation Impact
  • 11.2 Trade Policies

• 12 Technology & Innovation

  • 12.1 Emerging Technologies
  • 12.2 AI & Digital Trends
  • 12.3 Patent Research

• 13 Investment & Market Growth

  • 13.1 Funding Trends
  • 13.2 Future Market Projections

• 14 Market Overview & Key Insights

  • 14.1 Executive Summary
  • 14.2 Key Trends
  • 14.3 Market Challenges
  • 14.4 Regulatory Landscape

Segments Analyzed in the Report

The global Street Light Controllers market is categorized based on

By Product Type

• Centralized Controllers
• Decentralized Controllers
• Smart Controllers
• Timer-Based Controllers
• Dimming Controllers

By Application

• Highways
• Streets
• Public Parks
• Commercial Areas
• Industrial Areas

By Distribution Channel

• Online Stores
• Electrical Wholesalers
• Direct Sales
• Distributors
• Retail Stores

By Connectivity Type

• Wired Controllers
• Wireless Controllers

By Region

• North America
• Europe
• Asia Pacific
• Latin America
• Middle East & Africa

Key Players

• Schneider Electric
• Philips Lighting (Signify)
• General Electric (GE) Lighting
• Osram Licht AG
• Honeywell International Inc.
• Siemens AG
• Streetlight.Vision
• Fluence Bioengineering, Inc.
• Dialight
• RAB Lighting
• Acuity Brands, Inc.
• Legrand
• Urban Solar
• Royal Philips NV
• Trilliant Networks