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Optronics Streamline LED Trailer Tail Light - Submersible - 3 Function - 11 Diodes - Red Lens
Optronics

Optronics Streamline LED Trailer Tail Light - Submersible - 3 Function - 11 Diodes - Red Lens

Part Number: STL79RB
In Stock
$27.07
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17" x 1-3/8" x 1". Waterproof LED combination trailer tail light acts as a brake, tail, and turn signal when properly mounted. Durable polycarbonate housing and lens. Surface mount - hardware not included. 3-Wire design. Great Prices for the best trailer lights from Optronics. Optronics Streamline LED Trailer Tail Light - Submersible - 3 Function - 11 Diodes - Red Lens part number STL79RB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - STL79RB

Highlights

  • One Light, 3 Functions: Acts as stop, tail, and turn signal for full rear visibility.
  • Reliable In Any Weather: Sonically sealed polycarbonate housing and lens keep water out.
  • Fewer Replacements Needed: 11 LEDs last 50× longer than bulbs and use less power.
  • Durable on Rough Roads: SMT circuit resists shock and vibration for consistent lighting.
  • Simple 3-Wire Hookup: White for ground, red for stop/turn, black for running lights.
  • Low-Profile Fit: 17" Lx1-3/8" Wx1" D design with 16-1/8" mount spacing for easy install.

Features to know about

Brighter and Longer-Lasting Rear Lighting: 11-Diode LED Design

Old incandescent lights don’t hold up well to vibration or moisture, but this low-profile LED trailer tail light is built to last. With 11 diodes behind its red lens, it delivers strong, even illumination for brake, tail, and turn functions. At 12.8V, the stop/turn circuit draws just 0.350 amps and the tail circuit only 0.022 amps, so you get bright light with minimal power draw. LEDs also mean no fragile filaments or bulb swaps—just consistent performance that lasts up to 50 times longer than traditional lights.

Built to Handle the Elements: Fully Sealed and Waterproof

Moisture is one of the biggest enemies of trailer lighting, but this light doesn’t let it in. The polycarbonate housing and lens are sonically sealed into a single waterproof unit that keeps water from reaching the circuit board. Even when submerged, the sealed design protects the internal components so you can rely on it for boat trailers or in wet conditions without worrying about corrosion or burnouts.

Durable Construction That Withstands Shock and Vibration

Rough roads and frequent towing can shake apart weaker lights, but this one uses surface-mount technology (SMT) for the LED circuit board. SMT helps it resist shock and vibration better while also improving heat distribution. The tough polycarbonate housing adds even more durability, so it can handle the bumps and jolts without flickering or failing.

Straightforward Wiring and Simple Mounting

Setup is simple thanks to its 3-wire design—white for ground, black for running lights, and red for stop/turn signals. The light mounts on any flat surface using two holes spaced 16-1/8" center to center, with 3/32" (2.38 mm) diameter holes that fit #6 screws or similar hardware. At 17" long x 1-3/8" wide x 1" deep, it installs cleanly for a sleek look without sticking out awkwardly or requiring extra brackets or plates.

Reliable Performance for a Wide Range of Applications

This single light delivers dependable stop, turn, and tail illumination in one low-profile unit. Its red lens over white LEDs gives clear visibility day or night while keeping power use low and performance high. Whether you’re upgrading an older setup or replacing a failed light, this submersible LED model offers reliability and efficiency you can trust every time you hook up your trailer.

Specs

Dimensions

  • Overall dimensions: 17" long x 1-3/8" wide x 1" deep
  • Distance between mounting holes (center on center): 16-1/8"

Technical diagram of Optronics Streamline LED Trailer Tail Light model STL79RB showing dimensions, mounting hole spacing, and light layout for trailer installation.

Electrical and Power

  • Power draw at 12.8V (Stop/turn): 0.350 amps
  • Power draw at 12.8V (Tail): 0.022 amps

Lighting

  • Diodes: 11
  • Quantity: 1 light
  • Lifetime warranty on LEDs

STL79RB Optronics Streamline LED Combination Trailer Tail Light - Submersible - Stop, Tail, Turn - 11 Diodes - Red Lens - Quantity 1

Alternate part number: STL-79RB





Customer Satisfaction Score:

Ratings & Reviews

4.8

369 reviews
Review sort icon
17" x 1-3/8" x 1". Waterproof LED combination trailer tail light acts as a brake, tail, and turn signal when properly mounted. Durable polycarbonate housing and lens. Surface mount - hardware not included. 3-Wire design.

by:

Good price - fast shipping...THANKS!



by:

Lights up back of my trailer very well. The product performs as stated in brochure



by:

Working as expected!



by:

Beautifully designed, looks like two light bar, very bright and effective. I recommend this product.



by:

We installed two lights on a ramp for the rear of our car. They were so simple to install and they are very bright. Great product!



by:

The led lights were very easy to install and they look great. Thanks



by:

It looks great and received it fast. Thank you

Mike L. profile picture

Mike L.

2/4/2026

You're very welcome, Terry! I'm glad we could help you out!



by:

Rebuilt my boat trailer, have had them underwater several times and working
Perfect. Great easy product!



by:

These were to replace some on the back of my motorhome that I installed about 4 years ago. They corroded with Michigan’s winters and salted roads but looked so good I replaced them with fresh ones.



by:

Replaced the crappy original stick-out basic lights with these LED ones under the lip of the deck. Fit great, work great. Good product, as expected from etrailer.



by:

Inexpensive and easy to install. Mounted on a rough riding horse trailer and over thousands of harsh terrain, the lights work flawlessly.

Victoria H. profile picture

Victoria H.

4/8/2025

Looks like these lights are taking the ‘rough ride’ in stride James! Lighting the way, one rugged mile at a time! Keep shining bright out there :)



by:

I used this as a brake light and it has handled offroad abuse and has continued to work without any segments burning out. It was wired to provide the brightest output.



by:

I like a lot of folks did my research, I have a specific requirement for this cargo carrier, I need it to hold a dock box made by lifetime. And this carrier works perfectly. It was very easy to assemble. And very sturdy. I enclosed a picture of the dock box installed. I had to do some modifications to the dock box, but it worked out beautifully. I highly recommend this cargo carrier for the price quality and value.



by:

Worked great, I used them on the sides of my headache rack.

Steve S. profile picture

Steve S.

5/31/2021

There still working perfectly



by:

Everything good once I’ve got the correct light



by:

I installed this light as a third brake light at the top of my camper. LEDs, no maintenance, works great. A big improvement in safety. Order service was prompt and accurate. Good job.



by:

Looked at several lights on amazon. Flat on the back makes for a difficult connection. Found these on etrailer and worked great. Their is a good space behind the light to deal with the ground and wires. Excellent buy! Very happy with purchase. Shipping was fast and great follow up on purchase. Will buy again!



by:

Perfect fit , Excellent lighting for tr ailer



by:

East to install, replaced original 2012 lights, very bright



by:

I found that the travel trailer OEM tail lights were blocked by the cargo carrier. I installed these light as an extension of the OEM tail light. These lights enhanced the OEM lights. Now I worry a bit less about the vehicles behind me.



by:

The clear LED tailight strips that came with my trailer started filling with moisture and were only partially working. Most trailer part places only had the 15" lights. You were the only ones I found with the 17" lights and a diagram showing the mounting hole centers and dimensions. The product pictures were great for checking the wiring. Quick shipping and the tracking link was great. A few simple tools & some butt connectors and I was done. Finished the job with clear caulking around the lights.I like the red strip over the clear stock one and the lights are easy to see even in full sun.



by:

Boat and trailer are covered for the winter season. Won’t be installing the lights until the spring.
Look great though



by:

Identical to the one on the trailer. Once unscrewed from the rig I have about 1/8" of wire sticking out to work with. Haven't figured out how to pull enough wire from the camper to attach the new light so I haven't replaced it...yet. One day, though. One day.



by:

Great purchase experience. 11-LED Optronics Trailer Light STL79RB was delivered as promised and fits perfectly. Recommend this item and will return for my future lighting needs.

Sean profile picture

Sean

1/24/2023

Update: Have trailered my boat 3-4 times per month in the last year and these lights are still burning bright! Great, reliable product.



by:

The LED taillights worked out great with my trailer rebuild. They will be protected at all times because I was able to have them tucked out of harms way. They are not low where backing up would endanger them and not protruding from the sides to be in the way either.

But they are still highly visible at all times from the side or rear. THANKS for a great product!

Jerry profile picture

Jerry

11/12/2018

The tail lights were a great finishing touch to the rebuild of my utility trailer. The taillights are so visible and stay out of the way. They dont have those tender filaments in the old bulbs that a bouncing trailers play havoc with. Not to mention rusty bulb sockets that made the bulbs dimmer!


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See what our Experts say about this Optronics Trailer Lights

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    The wiring of the Optronics Trailer Light # STL79RB that you listed are: The white wire, with the mounting eye, is a ground wire that needs to be connected to the white wire of your trailer wiring. The black wire would be connected to your running lights and is the lower intensity illumination. This should be run to the brown wire of your trailer wiring as this is usually the tail light circuit. The red will be wired to the brake/turn wire and is for the higher intensity illumination....
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    You could use light # STL79RB as a third brake light. Normally it is not recommended to mix LED lights at incandescent lights because the lights don't have voltage/amperage regulators and an incandescent light could draw too much power through an LED and burn it out. But it would work fine in this case because in order to have a third brake light you would have to separate out the combined turn signal/brake light circuits to get a dedicated brake light only function for a third brake...
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  • Installation Instructions for Optronics 3 Function Streamline LED Light part # STL79RB
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  • Using Vehicle To Vehicle Taillight Converter # 118158 to Provide 3rd Brake Lamp on Trailer
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