Optronics Trailer LED Lights: Standard, Reflex & Backup
Not every red trailer LED bar performs the same function. The STL69RK is a standard 15-inch stop/turn/tail light, while STL69RRXB adds a built-in reflex reflector. The shorter STL68RBP includes a dedicated back-up function and different mounting centres. Choose by approved function, mounting layout and connection—not by light-bar shape alone.
Three different trailer-light functions
STL69RK: standard 15-inch light
An 11-LED stop/turn/tail bar with 14-1/8-inch mounting centres and a chrome A69CB base in the retail package. It does not include the separate back-up function.
STL69RRXB: 15-inch light with reflex
An 11-LED stop/turn/tail bar with built-in reflex reflector. Optronics lists its S2/T2/I6/A functionality for over-80-inch applications. It shares the STL69 footprint, not every mounting or trim detail.
STL68RBP: shorter FUSION backup combo
The 14-LED red/clear light adds a back-up circuit. Its body is about 10.125 inches wide and mounts on 9-11/16-inch centres, so it is not a drop-in replacement for a 15-inch STL69.
Optronics exact-model comparison
| Optronics MPN | Functions | Overall dimensions (W x H x D) | Mount centres | Wiring |
|---|---|---|---|---|
| STL69RK | Stop, turn and tail | 15 x 1.375 x 0.625 in | 14.125 in centres | Red stop/turn; black tail; white ground |
| STL69RRXB | Stop, turn, tail and reflex | 15 x 1.375 x 0.625 in | 14.125 in centres | Red stop/turn; black tail; white ground |
| STL68RBP | Stop, turn, tail and backup | 10.125 x 3.063 x 0.500 in | 9.6875 in centres | Red stop/turn; black tail; brown backup; white ground |
The STL69RK and STL69RRXB have 15-inch bodies but different reflex functions. STL68RBP is shorter and adds a separate backup-light circuit. These models are not automatically interchangeable.
Before selecting and installing
- Confirm which rear-light functions are required: stop, turn, tail, reflex and/or back-up. An additional back-up circuit is not present on STL69RK or STL69RRXB.
- Measure the existing lamp's overall dimensions and bolt-centre spacing. STL69 uses 14-1/8-inch centres; STL68 uses 9-11/16-inch centres.
- Compare the full wiring colours and required circuit functions before connecting the new lamp.
- Verify the exact light's manufacturer-listed markings and local installation requirements instead of relying on a similar shape.
- Use suitable corrosion-resistant connections and recheck stop, turn, tail and any back-up operation after installation.
Optronics lights by exact manufacturer number
Open the specific model for further specifications and current online availability.
Identification and RV tail lights
For the grouped red rear-identification function, compare Optronics LED identification bar models. For side-specific rectangular RV tail lights, see the RV tail-light and lens guide.
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