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LED Tail Light for Trailers Over 80" Wide - 8 Function - Submersible - 23 Diodes - Driver Side
Optronics

LED Tail Light for Trailers Over 80" Wide - 8 Function - Submersible - 23 Diodes - Driver Side

Part Number: STL37RPG
In Stock
$65.92
Retail:$85.28
You Save: 23%
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7-7/8" x 3-1/4". Low-profile tail light acts as brake, tail, turn, side marker, side reflex reflector, rear clearance, rear reflex reflector, and license plate for trailers wider than 80". Surface mount. Molded 2-way plug. PC Rated. Great Prices for the best trailer lights from Optronics. LED Tail Light for Trailers Over 80" Wide - 8 Function - Submersible - 23 Diodes - Driver Side part number STL37RPG can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (444)
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Optronics Trailer Lights - STL37RPG

Highlights

  • One Light, 8 Functions: Works as stop, tail, turn, side marker, clearance, reflectors, and license plate light.
  • Reliable In Any Weather: Sealed, waterproof housing keeps moisture out for submersible use.
  • Brighter, Longer Life: 23 white LEDs shine brighter and last 50 times longer than bulbs.
  • Low Power Draw: Uses just 0.181 amps on stop/turn and 0.047 amps on side marker at 12.8V.
  • Easy Wiring Options: Molded 2-way plug with separate ground wire simplifies setup.
  • Road Legal & Visible: DOT and PC rated for full 180° light coverage and safety compliance.

Features to know about

Reliable Lighting in Harsh Conditions: Fully Sealed and Submersible Design

If your trailer ever sees water, this light is ready for it. The circuit board and housing are completely sealed, keeping the 23 diodes and internal electronics dry even when submerged. It’s built for reliability in wet environments, so you don’t have to worry about corrosion or shorts after a dunk at the ramp or a drive on rainy roads.

All-in-One Functionality: 8 Lighting Features in One Compact Unit

This low-profile light packs eight functions into a single housing—stop, tail, turn, side marker, side reflex reflector, rear clearance, rear reflex reflector, and license plate light. At 7-7/8" long and 3-1/4" tall, it covers all rear lighting needs for trailers over 80" wide without adding bulk or needing extra fixtures. One light does it all, keeping things clean and simple.

Efficient LED Performance: Bright Output with Minimal Draw

Forget about changing bulbs or dealing with burned-out filaments. The 23 long-lasting LEDs provide crisp illumination while pulling very little power—just 0.181 amps for stop/turn and 0.047 amps for side marker at 12.8 volts. That means brighter lighting with less strain on your trailer’s electrical system and far less maintenance over time.

Wide Visibility Coverage: PC-Rated for 180 Degrees of Light

Safety is about being seen from every angle, and this PC-rated light shines a full 90 degrees in either direction from centerline for a total of 180 degrees of visibility. Properly mounted, it covers both rear clearance and side marker functions, improving visibility in traffic and at night from multiple viewing points.

Straightforward Mounting and Wiring: Surface Mount with Molded Plug

Installation stays easy with the surface-mount setup and included hardware. The molded 2-way plug and separate ground wire simplify the wiring process—whether you keep the quick-connect or cut it to use standard butt connectors. Either way, it’s a tidy install that keeps connections protected and secure.

Specs

Configuration

  • Driver's side: Left-hand side
  • Passenger's-side light: STL36RB (sold separately)

Diagram of Optronics STL37 Series LED Combination Tail Light showing labeled light functions for brake, tail, turn, side marker, and license plate illumination.


Dimensions

  • Length: 7-7/8"
  • Height: 3-1/4"
  • Depth: 2-7/8"

Electrical

  • Diodes: 23
  • Power draw at 12.8 volts (Stop/turn signal light): 0.181 amps
  • Power draw at 12.8 volts (Side marker light): 0.047 amps

Diagram illustrating the 180-degree beam spread of a PC-rated trailer light showing 90-degree coverage to either side of centerline.

  • PC-rated light coverage: Produces a 90-degree angle of light to either side of its centerline for a total of 180 degrees of coverage. This beam pattern can be clearly seen when you are standing directly in front of the light, as well as when you are standing on either side of the light.

Warranty

  • Lifetime warranty: LEDs

STL37RPG Optronics Aero Pro Combination LED Taillight for Marine Trailers More Than 80" Wide - Red Lens - Left Side

Alternate part number: STL-37RPG





Customer Satisfaction Score:

Ratings & Reviews

4.8

443 reviews
Review sort icon
7-7/8" x 3-1/4". Low-profile tail light acts as brake, tail, turn, side marker, side reflex reflector, rear clearance, rear reflex reflector, and license plate for trailers wider than 80". Surface mount. Molded 2-way plug. PC Rated.

by:

easy installation work great very bright



by:

Very FAST shipping perfect match



by:

Bought to replace a trailer light I ordered it on Sunday night and I had it Thursday thank you



by:

Exactly what I was looking for and super fast shipping.



by:

Extremely satisfied. Great product and excellent service. Continuously updated on location of product during shipping. Will definitely order from here again.



by:

Just what I ordered and got it in timely manner probably will order another one soon



by:

Works great, easy install



by:

Great service, quick shipping...excellent experience.

Thanks etrailer



by:

Great product - updated my old light to led submersible lights. Easy to install and they work perfectly.



by:

Just received the trailer light and in record time. eTrailer makes it so simple to shop online but are always there with knowledgeable staff to answer questions. I'll continue to use them.



by:

This was exactly the light I needed for a replacement after I broke the original on a Nitro trailer. The website and ordering were easy to use. It was quickly shipped and I received it quicker than anticipated!



by:

Excellent service and fast delivery made for outstanding first time buying experience!
The trailer lights I ordered were exact replacement and installation was a breeze.



by:

Received my led trailer lights, nice lights and fast shipping. Will be using your buisness again



by:

Looked around the web for days for the "correct" replacement for a broken Four Winns trailer tail light, Stumbled upon etrailer whom which finally had the correct part. Perfect fit, perfect price!

Thanks for an easy experience!!!
~Mark S.



by:

Light was a perfect fit for my boat trailer and simple install. Order arrived at my doorstep quickly.



by:

These lights are great. The original lights were just bulbs and the seals would fail, allowing water to get in. These LED lights are bright and waterproof and were a perfect replacement.



by:

Opti electronics LED trailer lights Urostyle UPS crushed my box when they delivered my lights and the light was broken you trailer mailed me a new one within three days unbelievable service thank you so much light is in perfect condition now !??



by:

Order these boat lights for a friend of ours boat trailer, they arrived sooner than we expected was so easy to install and works great, looks awesome, very pleased.

I called first to see if they carried these taillight and the employee was so nice and helpful, she offered to send a e-mail with the link to order the tail lights, very polite and concerned about our purchase.

We would definitely recommend this company and very impressive with the employees that helped make sure we got the right items we needed.

If I could give them l0 stars I would. Thank You.....



by:

New lights are great. Exact match to the old ones.



by:

The light was easy to install on my trailer both because the light housing is easy to work with and mount and also because the wiring plugs matched the existing wiring plugs on the trailer. The older incandescent lights had failed due to water getting into the housing. These lights seem to have a nice solid seal and also the LEDs should be resistant to failure if a little water leaks in over time. Also the LEDs are much brighter than the older incandescent lights we replaced. Very pleased with this product.



by:

Javelin Boat trailer tail lights. Original lights were pre-wired with 2 prong plug. Needed to replace lights. Wanted same lights.
Dealer did not stock, was not helpful in finding them.

etrailer was amazing. The young lady whom I dealt with was extremely helpful. Found the correct lights for me. Installation was a breeze. Lights work beautifully.

Definitely 5 stars. Will use again.



by:

Opened up the package, Walked out to my boat, snapped off the old light, snapped on the new light, fired up the truck and poof there were lights. Bought two one for the next time.

Trailer maintenance is no longer a big deal.

Winslow profile picture

Winslow

9/8/2020

Well about a year has passed and the lights are still perfect. No issues what so ever. Since then I have added reverse spot lights, led strips, and replaced the marker lights. Etrailer is my go to.



by:

Very quick turnaround. Thanks so much.
But
had to cut off the two pronged connection to splice into the boat trailer’s three prong wiring harness.

Carl profile picture

Carl

7/31/2023

Working great. Thanks for asking.



by:

Replacement light continues to function perfectly. Thanks for the follow up!

Bill profile picture

Bill

4/21/2025

My Optronic STL37RPGP driver side with license plate light continues to function as new. Very pleased with this taillight assembly.



by:

Fit perfect


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