Client: Chiang Mai Municipal Administration (Thailand)
Contractor: KASN Lighting Solutions
Scope: Installation of 150 units of 12-meter mains-powered LED streetlights across urban and suburban areas of Chiang Mai.
Objective: Upgrade outdated high-pressure sodium (HPS) lamps to energy-efficient LED systems, enhancing public safety and reducing long-term operational costs.
Case Details
Challenges
- Legacy Infrastructure: Existing HPS fixtures consumed excessive energy (250W+ per unit) and provided uneven illumination.
- Complex Urban Layout: Narrow streets, dense vegetation, and heritage zones required precise light distribution to avoid light pollution.
- Sustainability Goals: The municipality aimed to reduce carbon emissions by 30% within 5 years.
- Timeline Constraints: Installation needed to minimize disruption to daily traffic and tourism activities.
KASN Solution
1. Product Design
- 12-meter LED Street Light:
- Light Source: 120W high-efficiency LED modules (CCT: 4000K) with a luminous efficacy of 160 lm/W.
- Optics: Asymmetric lens design to focus light on roadways, reducing glare and spillage into residential areas.
- Durability: IP66-rated housing, corrosion-resistant aluminum alloy, and surge protection for tropical climates.
- Smart Control: Integrated motion sensors and dimming capabilities (0-100% adjustability) to save energy during low-traffic hours.
2. Implementation Strategy
- Phased Installation: Divided into 3 zones (downtown, suburbs, tourist corridors) over 8 weeks.
- Grid Integration: Leveraged existing municipal power infrastructure to minimize trenching and cabling costs.
- Community Engagement: Conducted pre-installation workshops to address residents’ concerns about brightness and aesthetics.
Key Outcomes
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Energy Savings:
- Reduced power consumption from 250W (HPS) to 120W (LED) per fixture, achieving 52% energy savings.
- Annual CO2 emissions reduced by 85 tons (equivalent to planting 3,900 trees).
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Performance Metrics:
- Average illuminance increased from 15 lux (HPS) to 30 lux (LED), meeting Thailand’s DOT Class M2 standards.
- Uniformity ratio improved from 0.3 to 0.6, enhancing driver and pedestrian safety.
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Operational Efficiency:
- Smart controls enabled 30% additional energy savings during off-peak hours (10 PM–5 AM).
- Maintenance costs lowered by 40% due to LED longevity (50,000-hour lifespan).
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Stakeholder Feedback:
- Municipal officials praised the project’s alignment with Thailand’s Smart City 2025 initiative.
- Residents reported improved nighttime visibility and reduced light trespass.
Innovation Highlights
- Adaptive Lighting: Motion sensors activated full brightness for approaching vehicles, balancing safety and efficiency.
- Heritage Compliance: Customized warm-white lighting (3000K) in historic districts to preserve cultural ambiance.
- Remote Monitoring: Centralized IoT platform for real-time fault detection and energy usage analytics.
Conclusion
KASN’s LED streetlight retrofit in Chiang Mai demonstrates how modern lighting technology can address urban challenges while supporting sustainability goals. By combining energy-efficient hardware, smart controls, and community-centric planning, the project has become a benchmark for similar initiatives in Southeast Asia.
Future Steps:
- Expand IoT integration to 500+ additional fixtures by 2025.
- Pilot solar-hybrid LED systems in off-grid suburban areas.
