



320 mm plastic-bodied four-function rear lamp
A 320*137*37 mm combination lamp with 44 diodes, aimed at mid-size trucks and trailers where the 450 mm steel lamp is simply too wide for the panel. The plastic housing keeps unit weight and cost down on high-volume builds while keeping the same welded IP67 seal.
Bodybuilders and distributors who need the four-function rear lamp in a smaller, lighter and lower-cost body than the steel version.
PC lens and housing, ultrasonically welded into one permanent waterproof body. Housing material and finish vary by model and are listed in the specification table.
| Brand Name | WEIKANG or Privately Labelled |
|---|---|
| Input Voltage | 12V, 24V, 10~30V |
| Functions | Stop/Turn/Reverse Tail Light |
| Mounting Type | Stud Mount |
| Light Size | 320*137*37 mm |
| Lens Marking | STI |
| IP Rating | IP67 |
| Applications | Truck, Trailer, RV, Speciality Vehicles |
| Category | LED Combination Tail Lights |
| Warranty | 5 years on light products |
| Packing | 1 piece per carton as standard; custom packaging from 200 pcs |
| Unit weight | TBC |
Values marked TBC are not published in our current documentation. Ask the sales team and we will confirm from the production record.
Hardware production, laser marking, heat diffuser assembly, light source welding and thermal grease application run on our own semi-automatic lines. Lens installation, shell assembly, ring fixing and spring insertion follow in product assembly.
Each production run passes through in-process, first-article and random inspection, and the finished lamps are 100% tested before packing.
It is the mid-size step between the 450 mm 72LED steel lamp and the 340 mm 36LED lamp — same functions and sealing, smaller body, plastic rather than steel.
Check the panel aperture against the 320*137*37 mm body before ordering
Mount on the studs with the gasket face flat and wire per function
Test stop, turn, reverse and tail individually after fitting
The housing is plastic with a PC lens welded to it; the 72LED version in the same family uses a steel body.
Yes. The lamp is specified as stop / turn / reverse / tail in a single unit.
Logo printing and specific labels are available, and the lamp can be privately labelled.
30% TT in advance with the 70% balance before shipment is preferred; L/C and other terms can be discussed.
Samples are available but not free; sample delivery takes 7-10 business days, and pictures, videos and test reports are sent free of charge.

450 mm steel-bodied rear lamp for heavy trucks and trailers
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Dual-colour 39LED rear lamp sized for Jeep Wrangler panels
View product →Tell us how many you need and which voltage. Stock orders start at 100 pcs and bulk production runs 30-40 business days.