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Combination LED Trailer Tail Light - Submersible - 6 Function - 11 Diodes - Passenger Side
Optronics

Combination LED Trailer Tail Light - Submersible - 6 Function - 11 Diodes - Passenger Side

Part Number: STL8RGB
In Stock
$21.26
Retail:$42.46
You Save: 50%
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In Use/Installed

5-1/4" x 4-3/4" Square. Waterproof trailer light serves 6 functions: stop, turn, tail, rear reflex, side marker, and side reflex. Stud mount on 2" centers. 2-Wire self-grounding design with 15" leads. Great Prices for the best trailer lights from Optronics. Combination LED Trailer Tail Light - Submersible - 6 Function - 11 Diodes - Passenger Side part number STL8RGB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (1304)
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Optronics Trailer Lights - STL8RGB

Highlights

  • One Light, 6 Functions: Provides stop, turn, tail, rear reflex, side marker, and side reflex lighting.
  • Reliable In Any Weather: Sealed, waterproof body is fully submersible to keep water out.
  • Fewer Replacements Needed: 11-diode LED design lasts 50× longer than incandescent bulbs.
  • Tough On The Road: SMT circuit resists shock and vibration for dependable performance.
  • Simple 2-Wire Hookup: Self-grounding studs and 15? leads make wiring quick and clean.
  • Built-In Reflector: No need for separate reflectors—safety and visibility are built in.

Features to know about

Brighter, Longer-Lasting, and Efficient: 11-Diode LED Tail Light

If you’re done with weak bulbs or flickering filaments, this combination tail light delivers dependable brightness every time. It uses 11 white LEDs behind a red lens to handle stop, turn, and tail lighting with far less power draw—just 0.259 amps for the stop light and 0.062 amps for the side marker at 12.8V. With LEDs that last up to 50 times longer than incandescent bulbs, you get crisp illumination that won’t fade or fail from vibration or heat.

No More Water Worries: Fully Sealed and Submersible Construction

Water intrusion ruins lights fast, but this one doesn’t let a drop in. The molded plastic housing and durable acrylic lens are sealed together so the light stays completely waterproof and submersible. Whether it’s backing into the water or dealing with wet roads, the sealed design keeps the LEDs dry and protected for consistent performance trip after trip.

Reliable Mounting That Keeps Things Simple: Stud Mount on 2" Centers

This light mounts solidly without extra brackets or adapters. The square 5-1/4" x 4-3/4" housing uses two mounting studs on 2" centers, and it grounds right through the hardware thanks to a self-grounding design. The included 15" two-wire pigtail makes wiring straightforward—one lead for running lights and the other for stop/turn functions—so there’s no confusion during setup.

Built Tough for the Long Haul: Durable SMT LED Technology

Rough roads and constant vibration can take a toll on traditional lights, but not this one. The LED circuit board uses surface-mount technology (SMT) that resists shock and distributes heat more evenly. That means fewer failures and steady light output even when conditions get bumpy. It’s a rugged, dependable setup that just keeps working.

All-in-One Design: Six Functions in One Compact Light

Instead of juggling multiple lights, this unit combines six functions in a single square housing—stop, turn, tail, rear reflex marker, side marker, and side reflex reflector. The built-in reflex reflector eliminates the need for separate hardware while keeping your trailer visible from every angle. It’s everything you need for safe signaling in one neat package.

Specs

Configuration

  • Configuration: passenger's side
  • Driver's side: STL9RGB (sold separately)

Dimensions

  • Overall dimensions: 5-1/4" wide x 4-3/4" tall x 2-11/16" deep
  • Light face: 4-3/4" wide x 4-3/4" tall
  • Distance between mounting studs (center on center): 2"

Diagram of Optronics STL8RGB combination LED trailer tail light showing labeled parts, mounting stud spacing, and light face dimensions for passenger-side installation.

Electrical

  • Diodes: 11
  • Power draw at 12.8V: Stop light: 0.259 amps
  • Power draw at 12.8V: Side marker light: 0.062 amps
  • Wire length: 15"

Warranty

  • Lifetime warranty: on LEDs

STL8RGB Optronics Combination LED Trailer Tail Light - Submersible - 6 Function - 11 Diodes - Passenger Side - 15" Lead - Self Grounding





Customer Satisfaction Score:

Ratings & Reviews

4.8

1304 reviews
Review sort icon
5-1/4" x 4-3/4" Square. Waterproof trailer light serves 6 functions: stop, turn, tail, rear reflex, side marker, and side reflex. Stud mount on 2" centers. 2-Wire self-grounding design with 15" leads.

by:

Quality product



by:

As advertised. Got here quick.



by:

I have received excellent service from you in all orders that I have placed with you.



by:

ILLUMINATING !!



by:

Works just as I expected. Good product!



by:

they are working great



by:

Incredible service. Order placement was so easy, price reasonable and delivery sooner than expected.



by:

Very easy to install. Very bright



by:

Kathleen profile picture

Kathleen

8/11/2023

Still happy about these taillights! Clean unit that was easy to mount and connect, and has stood up well.



by:

Easy to install, worked perfectly the first time. Still working.



by:

great value, excellent LUMENS, quick service,

James D. profile picture

James D.

7/30/2021

Fandamtastic



by:

My complete order of all products was p erfect



by:

Everything was fantastic.



by:

All my brake parts and lights came fast and worked well.



by:

Replacement lens, glad I didn’t have to buy the complete light



by:

Lights work great on my homemade enclosed trailer.



by:

Can't go wrong with LED... no more bulbs to smack when they don't work and forget to replace them afterwards
Cheaper than a ticket for defective equipment!



by:

Couldn’t have been better dealing with them.



by:

Great for my lighting upgrade project for my trailer.

Marvin profile picture

Marvin

1/28/2020

GREAT PRODUCT, NO ISSUES WOULD FOR SURE BUY AGAIN.



by:

unfortunately this lioght did not have a ground wire, so I had to midoify it a bit to ensure it was grounded

John P. profile picture

John P.

1/23/2024

After 1 year the lights are still working just fine! They work under water as I have often launched my boat with the lights on



by:

Received exactly what I ordered. The product was delivered in a reasonable tome and the cost was competitive. This is my 2nd purchase of this item and I will buy again should I need additional units.



by:

Good quality product connector is well made. Plenty of wire came for my installation (fairly short trailer) and instructions were clear. Still working after a year.



by:

SELECTION AND AVAILABILITY WAS EXCELLENT AND PRICING VERY GOOD. yET TO INSTALL THESE 2 FIXTURES ON THE TRAILER. sUGGESTING YOU ALSO OFFER LEAD-SPLICE OPTIONS SUCH AS BUTT OR SPLICE TERMINALS - ESP ADHESIVE LINED ONES. ANOTHER OPTION WOULD BE SEALED SOLDER-SLEEVE STYLES WHICH ARE PERFECT FOR THIS. i FORGOT TO CHECK THIS WHEN i ORDERED THESE AND THE SPLICES OF COURSE ARE NECESSARY TO INSTALL THESE LAMPS IN NEW OR REPLACEMENT APPS. HAVING RUN WIRE-CABLE HARNESS COMPANIES FOR 50 YEARS (RETIRED) I KNOW WELL BEST PROCESSING. MY CUSTOMERS WERE OSHKOSH TRUCKS AND PETERBUILT. THE SOLDER SLEEVE STYLES ARE SO EASY AND QUITE FOOLPROOF. i WILL RESPOND LATER AFTER GETTING THESE SPLCES AND INSTALLING THE LAMPS.



by:

Shipping good, quality great, installation easy! I got both left and right waterproof LED taillights for my trailer. They are very bright, and I don't have to worry about vibration loosening them. The cost? Much less than paying a ticket because one went out. Enjoy working with etrailer.

Eric G. profile picture

Eric G.

7/19/2020

No disapointment! These are trouble free and solid!



by:

Oem replacement part for my trailer
A
perfect replacement that functions great! I recommend these lights.


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See what our Experts say about this Optronics Trailer Lights

  • Replacement Light for a Wesbar 101535
    Hey Bryan. I couldn't find an exact replacement for your older Wesbar 101535. The closest option I did find is the Combination LED Trailer Tail Light item # STL9RGB driver's side and item # STL8RGB passenger side. These lights measure 5-1/4" wide x 4-3/4" tall x 2-11/16" deep. I attached a diagram below with that shows the dimensions we have for these lights. Can you widen out the cutout for the side lights?
    view full answer...
  • Are Taillights STL8RGB and STL9RGB a Set? What Butt Connectors and Shrink Wrap do I Need?
    Hello Dave, Yes, the Combination LED Trailer Tail Light - Submersible - 6 Function - 11 Diodes - Passenger Side # STL8RGB is the better half to the Combination LED Trailer Tail Light - Submersible - 7 Function - 14 Diodes - Driver Side # STL9RGB. The lights use 20 gauge wire, so you will need a pack of the Deka Heat Shrink Butt Connector - 22-18 Gauge - Nylon Insulation - Red - Qty 5 # DW05743-5. When I rewired my boat trailer I went ahead and put Primary Wire Heat-Shrinkable Tubing...
    view full answer...
  • Parts Needed To Install A Trailer Tail Light That Has 4 Wires
    I am unable find any lights like these that have the 4 wires for attaching to the light. You should be able to test each of the wires for their function using a 12 volt battery and connecting the wires directly to the terminals. My only concern is that your lights were set up to have separate brake light functions and that is why you have 4 wires. If that is the case and you want the lights to function properly you will have to run additional wiring and components as opposed to just using...
    view full answer...
    Image 1 for Image 2 for
  • Load Resistor For Correcting LED Trailer Running Lights That Light Dim When Vehicle Is Turned Off
    The Load Resistor Kit # DI34ZR is rated for up to 50 watts of power per resistor. While it is likely that all the LED running lights on your trailer use less than 50 watts of power you will want to verify this for all of your lights. You can use a Multimeter # PT29ZR to find your amperage being pulled for the running lights and find the wattage(Watts = Amps x Volts). Depending on your power consumption this will tell you how many and where the resistors need to be placed. It appears...
    view full answer...
    Image 1 for
  • Compatiblity of STL9RGB and STL8RGB LED Lights with Trailer With Physical Ground Wire
    The Combination LED Trailer Tail Light - Submersible - 7 Function - 14 Diodes - Driver Side # STL9RGB and # STL8RGB for the passenger side will work well for you. When installing the light you can ground your current wire to the mounting hardware post with a ring terminal which will ensure a quality ground.
    view full answer...
  • LED Trailer Taillights with 2 inch Between Mounting Holes and 2 Wire Design
    For a 2-wire trailer taillight with 2 inches between the mounting studs and is also LED you'd want the part # STL8RGB for the passenger side and part # STL9RGB for the driver side. The two wires you have to your current taillights will carry the running light circuit on one wire and the stop/turn on the other. So you'd need to use your circuit tester to test both wire by function when connected to a tow vehicle.
    view full answer...

Do you have a question about this Trailer Light?


Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Dustin K
Video Edited:
Dustin K
Employee Cole B
Installed by:
Cole B
Employee Randy B
Installed by:
Randy B
Employee Daron K
Edited by:
Daron K
Employee Zach D
Video by:
Zach D
Employee Brian T
Written by:
Brian T
Employee Matthew E
Updated by:
Matthew E

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