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1 Aspect Traffic Light Manufacturer Products
A 1-aspect LED traffic light, also called a single-aspect or single-section signal head, displays one indication at a time, typically red, green, or yellow. It is the most versatile building block in modern traffic control: deployed as a lane-use signal, a ramp meter, a pedestrian warning, a tunnel marker, a weigh-station indicator, or a hazard beacon. For project buyers sourcing single-color signal heads in volume, the right supplier must deliver consistent photometric output, reliable electronics, and certification that matches the buyer's destination market. GAOQIAO has manufactured 1-aspect LED signal heads since 2008, exporting to more than 60 countries across Southeast Asia, the Middle East, Africa, and Latin America.
Technical Specifications
| Parameter | Standard Range |
|---|---|
| Lens diameter | 100 mm / 200 mm / 300 mm / 400 mm |
| LED color | Red, Yellow, or Green (single color per housing) |
| Housing material | UV-stabilized polycarbonate or aluminum alloy |
| Operating voltage | AC 85–265 V, 50/60 Hz; DC 12 V / 24 V optional |
| Power consumption | 6 W (200 mm) to 18 W (400 mm) |
| Visibility distance | 200 m to 500 m depending on size |
| IP rating | IP65 standard, IP66 optional |
| Working temperature | -40 °C to +70 °C |
| LED lifespan | 100,000 hours minimum |
| Compliance | EN 12368, CE, RoHS, FCC, ISO 9001 |
How to Choose the Right 1-Aspect LED Signal
Selection depends primarily on three variables: the road environment, the required visibility distance, and the destination country's certification regime. A 200 mm (8-inch) head is the common minimum for urban roads with posted speeds under 50 km/h. For highway on-ramps, tunnel approaches, and industrial sites, 300 mm (12-inch) or 400 mm (16-inch) heads provide the visibility margin that prevents read-miss incidents. For countries following the European EN 12368 standard, insist on a current test report from an accredited lab; for the US market, MUTCD-compliant products may require ITE verification.
Buyers often make the mistake of specifying by wattage or by LED count rather than by luminous intensity and beam pattern. A 200 mm head that meets EN 12368 Class 1 will outperform a 300 mm head from a non-certified supplier under direct sunlight. Always request the photometric test report that matches your destination standard.
Another common pitfall: ordering 1-aspect heads without confirming the mounting interface. GAOQIAO signals support standard bottom-entry and side-entry mounting, but custom brackets are available for retrofit projects on legacy poles.
Key Features and Benefits
High-Efficiency LED Modules
Each 1-aspect head uses constant-current LED drivers with less than 5% lumen depreciation over 100,000 hours. This translates to roughly 11 years of 24/7 operation before re-lamping, eliminating the maintenance cost that historically dominated signal lifecycle budgets.
Robust Environmental Sealing
The polycarbonate housing is ultrasonically welded and gasket-sealed to IP65. Internal PCBs are conformal-coated against humidity and salt-spray corrosion, making the head suitable for coastal, tropical, and high-humidity deployments without additional enclosures.
Optical Design for Direct Sunlight Readability
A field-installed hood (visor) and anti-phantom mask prevent sun-phantom false signals, a common complaint in tropical deployments where low sun angles can mimic a green or red indication on an unlit lens. This is critical for single-color heads in regions with high solar elevation variance.
Common Applications
1-aspect LED traffic lights are specified in a wide range of projects:
- Highway ramp metering (single red/green per lane, US MUTCD compliant)
- Reversible lane control (red X / green arrow on bridges and tunnels)
- Tunnel entrance and exit signals
- Weigh station and toll plaza indicators
- Pedestrian crossing flashers (single red on both sides)
- Bus lane and HOV enforcement
- Industrial site hazard markers (mines, ports, depots)
- Railway level crossing backup signals
- Airport ground vehicle guidance
For projects requiring red plus green on a single pole, see our 2-aspect LED traffic light. For full intersection sets, see 3-aspect and 4-aspect variants.
Installation and Maintenance
Installation is straightforward: mount the head to a standard 1.5" or 2" pole-top bracket, route the cable through the bottom-entry gland, connect to the controller's designated output, and apply power. A typical retrofit of an existing incandescent signal to GAOQIAO LED takes 15 to 25 minutes per head, with no rewiring beyond the driver terminals.
Maintenance is minimal. We recommend a visual inspection every 12 months and a photometric verification every 5 years. The LED driver module is field-replaceable with two screws, allowing on-site repair rather than full-head replacement. For full installation guidance, request our LED Traffic Light Installation Guide.
Certifications and Compliance
All 1-aspect LED signal heads are manufactured under ISO 9001 quality systems and shipped with a standard documentation package: test reports (EN 12368 or equivalent), CE/RoHS/FCC certificates, photometric data files, and a 3-year limited warranty. For Saudi Arabia and GCC projects, SASO documentation is available on request. For Brazil (INMETRO) and Mexico, country-specific certification can be quoted as a project line item.
Why Choose GAOQIAO
GAOQIAO (Nanjing Gaoqiao Traffic Technology Co., Ltd.) has produced LED traffic signal heads in Nanjing since 2008. Our 1-aspect heads ship to municipal authorities, EPC contractors, and traffic equipment distributors in more than 60 countries. We hold ISO 9001:2015 certification, operate a 12,000 m² manufacturing facility in Jiangsu, and maintain a 15,000-unit-per-month production capacity for standard signal heads. OEM and ODM builds are supported for orders above 100 units. For full project references, see our company profile and cooperation cases.