The Optronics STL3RB is for the driver-side (left hand) of trailers 80 inches or wider. While most tail lights only handle signaling, this 18-diode LED powerhouse acts as a comprehensive safety suite, combining eight vital functions into a single, sonically sealed housing designed to survive the most demanding marine and commercial hauls.
What Makes the STL3RB Unique?
- The 8-in-1 Multitasker: This fixture does the work of an entire lighting array. It provides Stop, Turn, Tail, Rear Clearance, Rear Reflex, Side Marker, Side Reflex, and License Plate Illumination. It is a one-stop solution for DOT compliance on heavy-duty and wide-load trailers.
- Submersible "Sonic-Weld" Construction: Unlike "water-resistant" lights that use gaskets that eventually fail, the STL3RB features a lens and housing that are permanently fused together. This airtight, waterproof seal makes it a favorite for boat trailers that face constant submersion in both fresh and saltwater.
- Vibration-Proof LED Array: Featuring 18 high-output red diodes, this light has no fragile filaments to break. Whether you’re bouncing over gravel roads or hitting highway expansion joints, the solid-state electronics stay intact, providing a crisp, instant-on signal every time.
- Dedicated License Plate Downlight: The STL3RB features a specialized clear lens on the bottom of the housing, specifically angled to wash your license plate in bright, legal white light without the need for a separate fixture or extra wiring.
Detailed Specifications
- Trailers 80" or wider (Driver Side/Left Hand)
- Universal Double-Stud Mount (2" center-to-center)
- 18 High-Output Red Diodes
- 6-1/8" L x 4-9/16" H x 2-7/8" D
Installation Advantage
The STL3RB is engineered to eliminate grounding headaches. It comes with a 3-wire hardwired lead, including a dedicated white ground wire with a pre-crimped ring terminal. This ensures a rock-solid electrical path directly to the trailer frame, preventing the flickering issues common with lights that ground through the mounting studs.
Pro Tip: If your current trailer uses a 2-wire setup that grounds through the mounting studs, the dedicated ground wire on the Optronics STL3RB is a major upgrade. Secure it directly to a clean spot on your trailer frame to ensure your LEDs never flicker due to a loose mounting bolt.
