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LED Combination Trailer Tail Light - Submersible - 7 Function - 18 Diodes - Square - Passenger Side
Optronics

LED Combination Trailer Tail Light - Submersible - 7 Function - 18 Diodes - Square - Passenger Side

Part Number: STL2RB
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$26.94
Retail:$33.98
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6-1/8" x 4-9/16" Square. Waterproof LED tail light acts as brake, tail, turn, side marker, side reflector, rear clearance, and rear reflector for trailers over 80" wide. Stud mount - includes hardware. 3-Wire design. 18 Diodes. Great Prices for the best trailer lights from Optronics. LED Combination Trailer Tail Light - Submersible - 7 Function - 18 Diodes - Square - Passenger Side part number STL2RB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - STL2RB

Highlights

  • One Light, 7 Functions: Works as stop, tail, turn, side marker, side and rear reflector, and rear clearance.
  • Reliable In Any Weather: Sonically sealed, waterproof housing and lens stay leak-free when submerged.
  • Fewer Replacements Needed: 18-diode LED design lasts up to 50× longer than bulbs and draws less power.
  • Easy Bolt-On Fit: Stud-mount design with included hardware makes installation straightforward.
  • Compact and Bright: 6-1/8" L × 4-9/16" T × 2-7/8" D size fits tight spaces while keeping signals visible.
  • Road Legal: DOT compliant for trailers over 80" wide so you stay compliant on the road.

Features to know about

Brighter, Longer-Lasting, and Efficient: 18-Diode LED Tail Light

Forget about replacing bulbs or dealing with blown filaments. This square LED tail light packs 18 diodes that shine bright and last up to 50 times longer than traditional incandescent lights. It runs cooler, draws less power, and still delivers crisp light for stop, turn, and tail functions—using only 0.268 amps for stop/turn and 0.059 amps for marker at 12.8V. That means a reliable, energy-efficient setup you can count on every time you hit the road.

Worrying About Water Damage: Fully Submersible and Sealed

If your trailer ever sees water, this light is built to handle it. The housing and red lens are sonically sealed into a single waterproof unit so moisture can’t sneak in and ruin the circuit board or LEDs. Whether you’re launching a boat or hauling through heavy rain, this submersible design keeps the light protected and working like new.

Needing One Light to Do It All: 7 Functions in a Single Unit

Simplify your lighting setup with one light that covers everything—stop, tail, turn, side marker, side reflector, rear clearance, and rear reflector. No need for extra parts or wiring clutter. It’s designed for trailers over 80" wide and gives you full coverage at the corners for better safety and compliance on the road.

Flatbed trailer over 80 inches wide with Optronics combination LED tail lights installed at both rear corners for proper clearance and visibility.

Tight Mounting Spaces: Easy Stud Mount Installation

Mounting is straightforward with the included hardware. The light uses a 2" center-to-center stud mount setup that holds securely to your trailer frame. The 3-wire design—brown for running lights, green for stop/turn, and white for ground—makes wiring clean and simple. At 6-1/8" long by 4-9/16" tall by 2-7/8" thick, it fits neatly without sticking out or getting in the way.

Built to Last: Durable Housing with Lifetime LED Warranty

The tough plastic housing and red acrylic screw-on lens stand up to bumps, moisture, and weather exposure without fading or cracking. And since the LEDs are backed by a lifetime warranty, you can install it once and know your tail light will stay bright for the long haul.

Specs

Configuration

  • Configuration: passenger side
  • Driver side: STL3RB (sold separately)

Dimensions

  • Overall dimensions: 6-1/8" long x 4-9/16" tall x 2-7/8" thick
  • Distance between mounting studs (center on center): 2"

Dimensional diagram of the Optronics STL2 Series LED combination trailer tail light showing measurements for length, width, and mounting stud spacing.

Electrical

  • Diodes: 18
  • Power draw at 12.8V - Stop/turn: 0.268 amps
  • Power draw at 12.8V - Marker: 0.059 amps
  • System compatibility: 12V DC

Warranty

  • LEDs: Lifetime warranty

STL2RB Optronics LED Combination Tail Light for Trailers Over 80" Wide - Submersible - 7 Function - 18 Diodes - Square - Passenger Side - Right Hand

Alternate part number: STL-2RB





Customer Satisfaction Score:

Ratings & Reviews

4.8

3469 reviews
5 Stars
(2968)
4 Stars
(347)
3 Stars
(65)
2 Stars
(32)
1 Star
(57)
Review sort icon
6-1/8" x 4-9/16" Square. Waterproof LED tail light acts as brake, tail, turn, side marker, side reflector, rear clearance, and rear reflector for trailers over 80" wide. Stud mount - includes hardware. 3-Wire design. 18 Diodes.

by:

I received two lights for my birthday last September. I installed them on my trailer in October. The lights looked great, very bright. However, one of the lights had the side marker light go out. Since you can not replace the bulb I have purchased this replacement and will see if I have better luck with it. I will let you know.



by:

This a replacement for a broken light of the exact model. The light is very bright and has functioned flawlessly for many years.



by:

All ordered items worked great. Love the LED tail lights. Didn't have any problems fixing the trailer thanks to the many technical articles I found on etrailer. Not sure what happened with UPS shipping since I got notified that the parts had shipped on Saturday but didn't get them till Wednesday evening (paid extra for 3 day shipping), but definitely recommend ordering from etrailer.



by:

Exactly what I needed to replace my broken light!



by:

Replaced the old taillights with incandescent bulbs on our old cargo trailer as they just weren't bright enough to see easily in bright daylight. These LED taillights fixed that problem - they are easily seen at any time of day or night! And , as always, etrailer was great to do business with - I especially like how well they keep me posted on my order status.



by:

We have a car trailer we pull behind our RV. Lights died after just a year. I bought these as a replacement ... fit and look great.

I have ordered several lights and lenses from etrailer.

In stock, good price and fast shipping .. what more needs to be said.



by:

They work great. LED's are such a good way to go for trailer lights.

Bruce T. profile picture

Bruce T.

11/15/2017

They are working great. I am a big fan of LED light for trailers.



by:

Works great. Exact duplicate of the OEM unit. Thank you.



by:

Great quality. Received item in a timely manner. I haven’t put it on the trailer yet.so far I am happy



by:

Great light. Arrived quickly and performs flawlessly. I've had other trailer lights that the bulbs would short out or the bulbs would bounce loose with the vibrations of the trailer, but this one. It is still burning strong after a year of road use. It's also very bright, easy to see in daylight.

Rcs1611 profile picture

Rcs1611

3/18/2018

3/18/18 Light still works great. My trailer is in constant use hauling tractors and UTVs back and forth. Even with all that road use and some off road use the light still works properly. What more could you ask for than a product that does what it is supposed to do. Thanks etrailer



by:

The lights failed on my boat trailer after just 4 uses despite unplugging from the car when entering the water for launching the boat. Now only half of the LEDs light.

Patrick B. profile picture
Etrailer Expert

Patrick B.

12/2/2014

We will be in contact regarding the warranty coverage on these LEDs.



by:

Just what I needed, light work great



by:

Great customer service. Product as ad vertised

Jerry profile picture

Jerry

2/14/2025

Great. It was very easy to install and works great! Highly recommend the product

Robin H. profile picture
Etrailer Expert

Robin H.

2/16/2025

@Jerry great!


by:

Is a replacement for broken tail light on utility trailer! Love the led taillights! Was shipped promptly from you guys also! Thanks much!

Mking profile picture

Mking

6/27/2015

Was an exact replacement only different brand and has held up well! Very nright and easy replacement!



by:

Exactly what I needed



by:

I wanted to update my car hauler to LED lights and these lights do the trick. Anxious to see if they really last much longer than the incandescent... only time will tell but they look and perform well right now.



by:

Couldn't be more satisfied with the service. The order was delivered quickly and in perfect condition and exactly as described.



by:

Good replacement for broken stock light s.



by:

Fast delivery! I've made 3 purchases with etrailer. I would recommend them to my friends. Good prices and prompt delivery!

Thanks etrailer.com



by:

Bright, works as it ahould



by:

etrailer had the exact product and an outstanding price. didn't have to go all over town looking for it.



by:

Just received and installed this light today. Replaced 7 year old lights on my utility trailer hoping to not have to mess with light bulbs anymore. The light works as it should, it's nice and bright, arrived in a reasonable time frame, was packaged well, and hopefully will last. I have ordered many items from etrailer and have never had a problem.



by:

Very good quality product, LED tail lights and wiring rig for my boat trailer use, Jason promptly answered my questions on the product and install, top notch service.



by:

Not much to tell really. It was a replacement light and it is working well.



by:

The tail light arrived a day early and was double wrapped in bubble wrap. Wonderful service. Thanks so much.

Mike L. profile picture
Etrailer Expert

Mike L.

6/4/2026

I'm glad to hear they arrived in good shape, Marcia!!


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See what our Experts say about this Optronics Trailer Lights

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    Hey Benny! The side marker light is the same as a running light on the # STL3RB and # STL2RB. They are powered by the running light circuit and you can see them illuminated on the side of the light in the picture below. I also attached a review video. If you take a look starting at the 2 minute mark you will see that the side marker light remains illuminated while the turn signal is flashing. If you have any other questions feel free to reach out in the comments below.
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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lori W
Expert Research:
Lori W
Employee Jacob T
Video Edited:
Jacob T
Employee Adele M
Updated by:
Adele M
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T
Employee Dustin K
Video by:
Dustin K
Employee Cole B
Installed by:
Cole B
Employee Hayden R
Installed by:
Hayden R

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