LED Street Light
2,915 / 12W
1. Integrated Technical Design & Working Principle
A solar street light works on the principle of the photovoltaic effect, where sunlight is converted into DC electricity during the day and stored for nighttime use.
Solar PV Module: High-efficiency Monocrystalline (ideal for low-light/cloudy conditions) or Polycrystalline panels.
LED Luminaire: Equipped with high-lumen SMD chips and specialized asymmetric lenses that spread light horizontally across the road, minimizing glare and "dark spots."
Intelligent Controller (MPPT/PWM): The "brain" of the system. It manages the charging cycle, protects the battery from overcharging, and features a photocell for Dusk-to-Dawn operation.
Battery Storage: Modern units utilize LiFePO4 (Lithium Iron Phosphate) batteries, which offer superior heat resistance and a longer life cycle (2000+ cycles) compared to traditional lead-acid batteries.
2. Key Specifications
Wattage Options: Commonly available in 12W, 18W, 24W, 40W, 60W, and 120W.
Luminous Efficacy: High performance, typically delivering 130 to 160 Lumens per Watt.
IP Rating: IP65 or IP66, ensuring the fixture is completely waterproof and dust-tight for extreme outdoor environments.
Autonomy: Designed to provide light for 2 to 3 "Cloudy Days" (rainy day backup) on a single full charge.
Charging Time: Requires roughly 6 to 8 hours of clear sunlight for a full battery cycle.
3. Core Advantages
Zero Electricity Bills: Operates 100% on renewable energy, eliminating ongoing operational costs.
No Trenching or Cabling: Saves massive labor and material costs during installation as no underground wiring or transformers are required.
Maintenance-Free: No bulbs or starters to replace; built to last 10–12 years with minimal upkeep.
Independent Reliability: Stays functional during city power outages or grid failures, ensuring public safety.
4. Comparison of System Types
Type
Best For
Features
All-in-One (AIO)
Parks & Private Societies
Panel, Battery, and LED are integrated into a single, slim, easy-to-mount body.
Integrated
Main Roads
Panel is separate (for better tilt/sun tracking), while the battery is housed inside the light fixture.
Split Type
Highways & Industry
All components are separate; allows for much larger batteries and higher-wattage panels for heavy-duty use.
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