400mm Traffic Signal Three Aspects
The 400mm Three-Phase Traffic Signal consists of three units: a red unit, a yellow unit, and a green unit. Widely used at intersections and other locations, it guides the movement of pedestrians and vehicles, effectively managing traffic flow to ensure safety and order. Featuring high-brightness LEDs, the lights offer vivid, distinct colors and are highly visible from a distance, ensuring excellent visibility both day and night. By switching between different colors, this road infrastructure conveys instructions such as “proceed,” “stop,” and “caution” to road users. Its primary functions include scientifically allocating right-of-way, regulating the flow of vehicles and pedestrians, improving traffic efficiency, and reducing traffic accidents at intersections.
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1. 400mm Three-Aspect Traffic Signal: Green energy, economical and environmentally friendly, free of harmful substances, and emits no pollutants.
2. The LED in the 400mm Three-Aspect Traffic Signal uses Epistar chips from Taiwan, with a service life of ≥100,000 hours. It features high brightness, a unique optical system, uniform color distribution, excellent warning effectiveness, and slow light decay.
3. The protective coating on the housing and connectors of the 400mm Three-Aspect Traffic Signal is uniform in color, free of scratches, cracks, or exposed substrate defects, and its physical and chemical performance indicators comply with relevant national and industry standards;
4. The front and back of the 400mm Three-Aspect Traffic Signal housing feature a snap-fit design, allowing for easy access to the luminaire for maintenance and inspection;
5. The 400mm Three-Aspect Traffic Signal features low power consumption, a wide viewing angle, ultra-high brightness, long visibility distance, and extended operational life.
6. The 400mm Three-Aspect Traffic Signal is robust and durable. It is stable and reliable, with a high protection rating. It is impact-resistant, resistant to aging, and corrosion-resistant. It is waterproof and easy to install.
7. The 400mm Three-Aspect Traffic Signal complies with GB/T 14887-2003 and relevant international standards;
8. Product warranty: ≥2 years;
9. The 400mm Three-Aspect Traffic Signal features an elegant appearance;
400MM Three-Light Traffic Signals
Red Light Warning
High-brightness LED chip with strong light penetration. Suitable for high-warning scenarios such as no-entry indication and equipment fault alarm.
Delivering excellent long-distance visibility.
Yellow Light Alert
Eye-catching yet non-glaring,it is suitable for scenarios of safety reminder,slow-down warning or equipment standby status.
Balancing warning effect and visual comfort, 100 mm traffic light three aspect features a wide range of applications.
Green light -Proceed
Soft and clear light, specially designed for passage permission and normal-operation status of equipment.
Vision-friendly with high recognizability,it guides safe passage.
400MM Three-Light Traffic Signal Function
Red light (Upper Section):
Indicates that motor vehicles must stop and wait behind the stop line; crossing the intersection is prohibited; 400 mm traffic light three aspect manages traffic flows in conflicting directions and ensures the safety of lateral traffic movements.
Yellow light (Central Zone):
Signal transition warning. When the yellow light is illuminated, vehicles that have already crossed the stop line may proceed through the intersection; vehicles that have not yet crossed the line should stop and wait. This signal serves as a buffer for the transition between red and green lights, helps clear any remaining traffic from the intersection, and prevents accidents caused by rushing through the intersection.
Green light (Lower Unit)
AAllows motor vehicles to proceed according to intersection rules; permits vehicles to cross the intersection and releases traffic flow in the current direction.
Intersection traffic management:
Assigning right-of-way to vehicles traveling in different directions, managing cross-traffic at intersections, preventing conflicts between vehicles from multiple directions, and improving intersection throughput.
Long-range high-visibility warning system
Features a 400 mm large light-emitting surface with high-brightness direct-mount LED chips, ensuring uniform illumination. The effective visibility range spans 1–800 meters, enabling drivers at any distance to clearly identify the signal – making 400 mm traffic light three aspect ideal for intersections with heavy traffic volumes or high vehicle speeds. High brightness combined with a shading cover ensures visibility even under intense light conditions; the long visibility range is suitable for both clear and overcast weather; the wide viewing angle allows for clear signal detection from multiple angles; and the low power consumption results in minimal heat generation.
Time-based coordinated control:
Can be integrated with traffic signals to enable automatic cyclic switching between red, yellow, and green lights; some models can be externally connected to a countdown module to inform drivers of the remaining time until the next signal change.
Safety protection:
The housing is waterproof and dustproof, making 400 mm traffic light three aspect suitable for outdoor applications; the LED light source features low power consumption and a long service life, reducing the likelihood of malfunctions and ensuring continuous signal output at intersections.
Environmental adaptability
Features high-brightness LED light sources with low power consumption and long service life; the waterproof and dustproof housing enables all-weather outdoor operation, accommodating exposure to sunlight, rain, and extreme temperatures.
All-weather stable illumination
Operates on a wide voltage range of AC 85–265 V, suitable for extreme temperature environments from –40°C to 80°C; features IP53 dust and splash protection; enables long-term continuous operation both indoors and outdoors; ideal for use at factory entrances/exit points, parking lot aisles, weighbridges, barrier gates, car wash facilities, and driving school training areas.
Flexible installation compatibility
Supports both horizontal and vertical installation methods; when paired with an L-shaped bracket, 400 mm traffic light three aspect can be quickly secured to structural members, accommodating a variety of installation scenarios.
400MM Three-Light Traffic Signals Solves core pain points for customers
Solution: Low signal visibility during rainy or foggy conditions or under strong daylight conditions.Equipped with high-brightness LED beads and an optical filter hood, this solution addresses the issue of dim signal lights under direct sunlight on clear days or in cloudy, rainy, or foggy conditions – ensuring drivers can clearly identify the signals both day and night.
Solution: Traffic flow conflicts at intersections and chaotic traffic order The complete red, yellow, and green three-color signal system can be integrated with traffic signals for timed control. This solution addresses issues such as mixed traffic flow (including both pedestrians and vehicles) and aggressive driving at intersections without proper signal control, resulting in chaotic traffic patterns and a high incidence of traffic accidents; 400 mm traffic light three aspect also allocates traffic rights to each direction and helps standardize traffic flow.
Solution:Address harsh outdoor conditions that can lead to equipment damage, water leakage, or dust ingress.An integrated sealed protective casing that is waterproof and dustproof. 400 mm traffic light three aspect addresses common issues such as exposure to sunlight and rain in outdoor environments, dust or insect ingress into the lamp body, early-stage component damage, water ingress leading to short circuits, and the need for frequent maintenance or replacement – making 400 mm traffic light three aspect suitable for all-weather outdoor use.
Solution:Significant post-installation maintenance workload and frequent light source replacement.The LED lighting module features low power consumption and a long service life. 400 mm traffic light three aspect addresses the challenges associated with traditional halogen lamps—namely high power consumption, short lifespan, the need for frequent bulb replacement at elevated heights, high operational and maintenance costs, and significant safety risks during high-altitude work—thereby significantly reducing the frequency of inspection and maintenance visits.
Solution: Compatible with existing traffic signal control systems Standard electrical interfaces compatible with mainstream traffic signal controllers – addressing the pain point where certain non-standard signal lights cannot be integrated into existing signal control platforms, and enabling direct integration during both new and existing system upgrades.
Solution: High device power consumption leading to elevated long-term electricity costs.Low-power LED design: addresses the issues of high power consumption in traditional traffic signals, the prolonged operation of multiple signals at intersections over extended periods, and significant municipal electricity costs, thereby reducing long-term energy expenses.
Solution: The signal light switching system lacks a yellow light buffer, which can easily lead to rear-end collisions due to sudden acceleration.A comprehensive yellow light warning system. This system addresses the issue where, with only red and green signal lights – where the green light is immediately overridden by the red light – accidents involving sudden braking, rapid acceleration, or rear-end collisions at intersections occur frequently; the yellow light serves as a buffer to clear the traffic flow from the intersection.
400MM Three-Light Traffic Signal Wiring Instructions

Red line
The Red Light Line provides power input to the red LED module, ensuring proper illumination of the red light.

Green line
Green light line – independently controls a green LED module, enabling individual switching of the green light source.

Yellow line
Yellow Light Line: Independently controls the yellow LED module to enable individual switching of the yellow light source.

Black line
The public neutral conductor, which serves as the common terminal for the circuit loop, must be reliably connected to the power supply neutral conductor.

Wide-range voltage
Supports a wide input voltage range of AC 85–265 V, compatible with power grid voltage standards worldwide.
Product Installation (Vertical Installation Example)

Nut Assembly – Disassembly
The lamp features built-in screws at both ends; first, remove the screw and its nut.

Fixed L-shaped bracket
Align the flat ends of the two L-shaped brackets with the luminaire mounting holes, then insert the screws into the slots. Tighten the nuts.

Whole-unit component installation
Drill holes in the signal light pole; insert the matching screw through the pole; secure the assembled L-shaped bracket to the pole; tighten the lock nut to complete installation. Tighten the nut.
Usage Instructions & After-Sales Warranty

Usage Instructions
The 125mm three-aspect traffic light features a high-strength sheet-metal casing coated with electrostatic spray paint; avoid applying excessive pressure or subjecting it to severe impacts to prevent damage or deformation. The installation, wiring, and power-on procedures for the luminaire must be performed under the guidance of a qualified professional electrician. Non-professional individuals are advised not to disassemble or assemble the unit independently, as this may lead to circuit malfunctions or electric shock hazards.

Warranty Commitment
We provide a 3-year original manufacturer's warranty to ensure the proper functioning of the luminaire's main structure and core light source; however, wear-and-tear components (e.g., lampshades, connecting cables) and customized non-standard products are not covered under this warranty.

Repair Submission Process
For the customer return-to-service model, please first contact our after-sales customer service to register the fault details; upon receiving authorization, please return the product to a designated service center or send it back to the manufacturer via courier for professional inspection and repair.

Disclaimer
Damage resulting from human-induced damage, unauthorized modification, improper use, or force majeure events (such as fire, earthquake, or voltage abnormalities), as well as malfunctions caused by failure to operate the device in accordance with the instruction manual, are not covered under the free warranty.

Logistics Responsibility
For product repairs, the one-way shipping cost incurred when sending the product from the customer to the after-sales service point shall be borne by the customer; for defects identified during inspection as falling within the warranty scope, the shipping cost for returning the repaired product shall be covered by the brand owner.
Usage Precautions
This product features a PC plastic casing; avoid applying excessive pressure to prevent damage to the casing. The device must be powered on only under the supervision of a qualified professional; do not disassemble or assemble the luminaire without authorization.
| Product Model | WDM-JD400-3-PC-RYG |
|---|---|
| Product Name | 400-type Red, Yellow, Green Three-Light (PC) |
| Product Dimensions | 1410*470*140MM |
| Number of Light Chips | 204 red, 204 yellow, 204 green |
| Light Chip Type | Taiwan Crystal Chip Light Chips |
| Red Wavelength | 620-625NM |
| Yellow Wavelength | 590-595NNM |
| Green Wavelength | 500-505NM (Blue-Green), 520-525NM (Cyan Green) |
| Service Life | 100,000 Hours |
| Shell Material | PC |
| Operating Temperature | -40℃ – 60℃ |
| Protection Grade | IP53 |
| Operating Voltage | DC12V/DC24V/AC85-265V |
| Rated Power | ≤15W |
| Visible Distance | ≥800M |
| Installation Method | Horizontal or Vertical Installation |
| fittings of a machine | quantity | Note: |
| lamps and lanterns | 1 unit | Available in red, yellow, or green – to meet various warning requirements across different scenarios. |
| L-shaped bracket | 2 | High-strength cold-rolled steel sheet – used to securely fix the luminaire body. |
| certificate | 1 piece | As a material release certificate |
| product specification | 1 piece | Includes product technical specifications, illustrated installation steps, and a safety and maintenance guide |







