How to Choose Traffic Light Size: 100mm, 200mm, 300mm, 400mm
Selecting the correct LED traffic light diameter is essential for visibility, compliance, and road safety. This guide explains the common sizes and their ideal applications.
100mm (4 Inch) Traffic Lights
The smallest standard size, 100mm traffic lights are typically used for parking lots, private roads, driveways, and indoor testing applications where viewing distance is short.
- Visibility: Up to 50 meters
- Best for: Parking control, access control, warehouses
200mm (8 Inch) Traffic Lights
200mm is a popular size for secondary roads, school zones, and smaller intersections. It balances cost and visibility effectively.
- Visibility: 100-150 meters
- Best for: Local roads, parking lots, campus areas
300mm (12 Inch) Traffic Lights
300mm is the standard size for most urban intersections and highway applications. It provides excellent visibility and meets most international standards including EN12368.
- Visibility: 200-300 meters
- Best for: Urban intersections, highways, main roads
400mm (16 Inch) Traffic Lights
Large 400mm traffic lights are used for high-speed roads, highways, and locations where maximum visibility is required from long distances.
- Visibility: 300+ meters
- Best for: Highways, tunnels, large intersections
Summary Table
| Size | Visibility | Common Application |
|---|---|---|
| 100mm | Up to 50m | Parking, access control |
| 200mm | 100-150m | Local roads, schools |
| 300mm | 200-300m | Urban intersections, highways |
| 400mm | 300m+ | High-speed roads, tunnels |
Conclusion
Choose your traffic light size based on viewing distance, road speed, and local regulations. GAOQIAO offers all standard sizes with customization options.