Traffic Light Size Selection: 100 mm to 400 mm
Use the nominal optical diameter as the starting point, then confirm the real GAOQIAO product, indication, housing, mounting and controller interface for the project.
Quick selection matrix
| Planning item | Typical use | Confirm before ordering |
|---|---|---|
| 100 mm / 4 inch | Compact modules and small signal applications | Published red LED module and complete housing requirement |
| 125 mm | Solar barricade and warning flasher | Face count, lens, flash pattern and mounting |
| 200 mm / 8 inch | Compact vehicle, warning and replacement heads | Aspect count, replacement dimensions and controller |
| 300 mm / 12 inch | Intersection, arrow, pedestrian and countdown | Signal schedule, viewing distance and voltage |
| 400 mm / 16 inch | Longer viewing distance and larger approaches | Road speed, mounting load and optical requirement |
How to use this size guide
The size below is a nominal optical or product dimension. Viewing distance, road speed, background contrast, local standards and the required indication must be checked before a final selection.
Each card links to a GAOQIAO product page with a representative image and product title. Confirm the latest drawing, voltage, aspect count, mounting and available customization with GAOQIAO before ordering.
100 mm: compact modules and small signals
The 100 mm class is used for compact signal heads, parking or access indications and replacement LED modules. The published 4 Inch (100MM) red LED module is a component reference; a complete signal head must be selected with its housing and controller interface.
125 mm: solar barricade and warning applications
The 125 mm class is represented by the published two-face solar flashing barricade light. It is intended for warning or work-zone visibility rather than a standard three-aspect intersection signal, so lens color, flash pattern and mounting must be confirmed.
200 mm: compact vehicle, warning and replacement heads
The 200 mm / 8 inch class includes compact vehicle and pedestrian signals, warning faces and replacement housings. A four-section replacement body is useful when the project needs to repair or reconfigure an existing signal installation.
300 mm: common intersection and arrow configurations
The 300 mm / 12 inch class includes ball, arrow, pedestrian, bicycle and countdown configurations. The published three-aspect arrow signal system is a practical reference for vehicle-turning applications, subject to the approved phase and controller schedule.
400 mm: long-viewing-distance signal heads
The 400 mm / 16 inch class is commonly considered where the viewing distance, road speed or intersection geometry needs a larger optical face. GAOQIAO publishes three-aspect arrow, pedestrian and bicycle configurations in this class.
Request a size and configuration review
Send the country and standard, approach speed, viewing distance, signal schedule, indication type, mounting drawing, voltage, controller model, quantity and destination. GAOQIAO can then confirm the appropriate size and available product configuration.
Relevant GAOQIAO products
These are real public GAOQIAO catalogue pages related to the guide. Open the product page for the representative image and product description, then request the latest drawing and configuration review before ordering.
100 mm red LED moduleOpen the published product page and confirm the current drawing, voltage, mounting and available configuration.
125 mm two-face solar flashing barricade lightOpen the published product page and confirm the current drawing, voltage, mounting and available configuration.
200 mm four-section replacement bodyOpen the published product page and confirm the current drawing, voltage, mounting and available configuration.
300 mm three-aspect arrow signal systemOpen the published product page and confirm the current drawing, voltage, mounting and available configuration.
400 mm three-aspect arrow signal systemOpen the published product page and confirm the current drawing, voltage, mounting and available configuration.