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Optronics LED Trailer Light w/ Flange - Brake, Turn, Tail - Submersible - Surface Mount - Oval - Red
Optronics

Optronics LED Trailer Light w/ Flange - Brake, Turn, Tail - Submersible - Surface Mount - Oval - Red

Part Number: STL73RB
In Stock
$15.22
Retail:$26.50
You Save: 43%
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In Use/Installed

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7-9/16" Waterproof light displays brake, tail, and turn signals on your trailer, and mounts to the surface with the built-in flange so you don't need to cut a hole in your trailer. Hardwires with the 3-wire pigtail. Great Prices for the best trailer lights from Optronics. Optronics LED Trailer Light w/ Flange - Brake, Turn, Tail - Submersible - Surface Mount - Oval - Red part number STL73RB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (1753)
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Optronics Trailer Lights - STL73RB

Highlights

  • One Light, 3 Functions: Handles brake, tail, and turn signals for a clean setup.
  • Reliable In Any Weather: Waterproof housing keeps moisture out on boat or utility trailers.
  • Fewer Replacements Needed: 6 LEDs draw only 0.161 amps (brake/turn) and 0.007 amps (tail).
  • Simple Surface Mount: Built-in flange eliminates the need for a cutout or custom fit.
  • Easy Wiring: 3-wire pigtail connects directly—white ground, black running, red stop/turn.
  • Road Legal: DOT compliant so your trailer stays visible and compliant on the road.

Features to know about

Upgrading to Reliable, Efficient Lighting: 6-Diode LED Tail Light

Old bulbs can dim or fail when you need them most. This oval red LED light gives you dependable brake, turn, and tail signals with six long-lasting diodes that draw very little power—only 0.161 amps for brake/turn and 0.007 amps for tail at 12V DC. The LEDs burn brighter, use less energy, and won’t wear out like filaments do, so you get a crisp, clear signal every time you hit the brakes or turn.

Keeping Moisture Out: Fully Waterproof and Submersible Build

Water damage ruins a lot of lights, especially on trailers that see rain or boat ramps. This one is built to stay sealed tight. The polycarbonate housing and lens are waterproof, so the light can handle full submersion without fogging or shorting out. You can pull out of the water knowing your lights will still work on the way home.

No Cutting Required: Surface Mount with Built-In Flange

Not every trailer is set up for flush lighting, and cutting new holes can be a pain. This light mounts flat against your trailer with its built-in flange—no cutout needed. It secures through mounting holes spaced 7" horizontally and 2-3/4" vertically (center to center). Just line it up, bolt it down, and wire it in with the included 3-wire pigtail: white for ground, black for running lights, red for stop/turn.

Matching Looks and Added Safety: Optional Reflector Trim Ring

If you want to boost visibility even more, you can add the snap-on reflector trim ring (part # A78RXB, sold separately). It clicks right over the flange to give your tail light a finished look while adding reflector coverage that helps others see your trailer in low light.

Built to Last with Lifetime LED Warranty

The sealed design and rugged polycarbonate lens mean this light holds up in harsh use. And with a lifetime warranty on the LEDs, you can count on long service life without needing replacements or spare bulbs down the road.

Specs

Dimensions

  • Overall dimensions: 7-9/16" long x 3-5/16" tall x 3/4" thick
  • Light dimensions: 6-1/2" tall x 2" wide
  • Distance between mounting holes (center on center): Horizontal: 7"; Vertical: 2-3/4"

Technical dimension diagram of Optronics STL73RB oval red LED trailer tail light with flange, showing measurements and mounting hole spacing.

Electrical

  • Compatible with: 12V DC systems
  • Diodes: 6
  • Power draw at 12 volts (Brake/turn): 0.161 amps
  • Power draw at 12 volts (Tail): 0.007 amps

Warranty

  • Lifetime warranty on LEDs

Installation diagram of surface-mount Optronics LED trailer tail light showing flange placement and mounting method on trailer body.

STL73RB Optronics Fleet Count LED Tail Light w/ Flange - Stop, Turn, Tail - Waterproof - 6 Diodes - Oval - Surface Mount - Red Lens





Customer Satisfaction Score:

Ratings & Reviews

4.8

1751 reviews
5 Stars
(1530)
4 Stars
(143)
3 Stars
(36)
2 Stars
(17)
1 Star
(25)
Review sort icon
7-9/16" Waterproof light displays brake, tail, and turn signals on your trailer, and mounts to the surface with the built-in flange so you don't need to cut a hole in your trailer. Hardwires with the 3-wire pigtail.

by:

Great folks to work with, always quality products and quick turnaround



by:

I hope they work. The old ones got water inside the housing.

Mark profile picture

Mark

6/4/2025

Easy to install. Still working.



by:

Very easy to install and great price!



by:

It works A+



by:

Just what I needed...Thank you



by:

This tail light was better than the original. Perfect fit and easy to reinstall. Recommended to others in campground.



by:

Perfect fit.



by:

This may be one of the easiest companies I have worked with. The customer service and promptness is top shelf. I am just an individual with small orders, and they were amazingly responsive and helpful. There site is loaded with helpful information and videos as well. I’m a fan!



by:

With the matching chrome rings, these fit my 2009 Airstream perfectly and made it look new again! Airstream suppliers wanted $69.00, just for one tail light. I'm so glad I replaced them all. Thank you!



by:

Exactly as described, delivered quickly and excellent follow up from customer service team. Well done.



by:

Product fit perfectly and works as expected. Arrived on time and price was fair.



by:

Quick service. Part as described. Good company. I recommend them

Ben profile picture

Ben

10/23/2025

No problems



by:

Perfect match and fit.



by:

Perfect fit.



by:

Fair price, good quality, works as advertised, prompt delivery.



by:

The larger base helped me cover existing holes that were from an older large oval style light. The extra length of the base of these lights combined with the chrome trim ring coved all signs anything else was ever there. The 6 led diodes on low are very chill and at first I was thinking it wouldn't put out adequate light but when brake was applied omg lots of light for 6 diodes. Before and after pictures help under below



by:

The lens fell off of my last taillite. This one is sealed and cannot fall off.



by:

Easy install, bright lights, have held up well over 1 year. Work great on my folding 4x8 trailer from harbor freight. Having the lights mounted in the back of the trailer is much better than hanging them off the sides where they constantly catch on things. Love the low profile design.

Matt profile picture

Matt

3/27/2025

Still working great! Would definitely consider for future projects and recommend to others.

Jerred H. profile picture
Etrailer Expert

Jerred H.

3/27/2025

@Matt That's awesome! Glad they're working so well for you!


by:

Nice and bright! Easy installation.



by:

Exact match to the old light



by:

Great product if you have an odd ball trailer light set up like I do that requires a center mount position plug! Fast east purchase and fast shipping, great company to deal with!



by:

This light was almost an exact match for the stock light that came on the camper. I bought 2 and replaced them both, and they seem to be a little bit brighter than the originals, which I am glad with.



by:

I have not hooked it up to power, but I'm sure it will work. THe only disappointment I had was the light I removed had a rubber pad to help seal the screw holes and wire entry to the back of my trailer to keep moisture out. This light does not have that and it is not available from your company.

Bob profile picture

Bob

2/18/2026

Evidently just fine. I traded my camper in on a new one and it was just fine during the inspection.



by:

Exact replacements for my old tail lights.Fit perfectly. They also solved the issue. Tho old tail lights were allowing the blinker current to back track through the clearance lights. One of tail lights had water in it and when it flashed the clearance lights flashed too.

Victoria H. profile picture

Victoria H.

3/8/2025

So glad to hear these worked out perfectly for you and they look good too, Steve!



by:

While I've not yet installed these they look like good replacements for the OEM lights. They are the correct style, size and the screw hole placement seems to be correct. My only reason for giving them an average rating is that they don't come with any gaskets. The original lights have a gasket between the back of the light and the wall of the camper. While the light unit itself is sealed the wires come through a hole in the camper wall and without a gasket the possibility of leaks is there. I will likely buy some gasket material from an auto parts store and make my own. No, I don't think the camper sealant will work as well as a rubber gasket.


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See what our Experts say about this Optronics Trailer Lights

  • Is Gasket Needed to Install Optronics Trailer Taillight # STL73RB
    Hey Eric, we do not have a gasket for the part # STL73RB as it does not normally need one.
    view full answer...
  • Does Optronics Clearance Light # STL733RB Come with Reflector Ring
    Hey Michael, so the LED Trailer Taillight part # STL73RB does not come with the reflector ring you asked about but you can pretty easily add it with the part # A211RXB.
    view full answer...
  • How to Determine Correct LED Tail Lights For Rolco Trailer
    Hey Daran, The numbers you gave don't correspond to any light I could find, but it's easy to find the right one. All you have to do is measure your current tail lights and find the one that most closely matches your measurement, and also know if your lights are surface mounted or recessed mounted. For example, the Optronics LED Trailer Tail Light # STL73RB has a light face which is 7" long x 2-3/4" tall and is surface-mounted. If you let me know what your light measures and how they...
    view full answer...
  • Replacement LED Tail Light for Triton Boat Trailer Part # 08478
    I was able to pull up some information on the Triton 08478 light that you mentioned and it appears that the LED Trailer Tail Light w/ Flange - Stop, Turn, Tail - Submersible - 6 Diodes - Oval - Red Lens # STL73RB is the same part. I've linked a photo with the dimensions of this light, but it is also an oval LED light with 3 wires like the 08478, so it should do the job for you. If you've got a different sized light just let me know and I can see what we have available that would work.
    view full answer...
    Image 1 for
  • How to Wire Optronics LED Trailer Tail Light w/ Flange
    I do not have a schematic but I can tell you how the LED Trailer Tail Light w/ Flange # STL73RB should be wired. The white wire will be your ground source, the black wire is for the running light, and the red wire will be for your stop/turn signal.
    view full answer...
  • How Does Taillight Ring # A78RXB Get Removed
    To remove the ring # A78RXB you basically would want to grab one side of the ring and gently pry up on the ring till it releases from the mounting flange. If it does not want to remove this way you can use a thin slot screwdriver and slide it down into the slots on the sides of the light. This will allow you to push on the hooks of the ring so that they will release from the light. See picture to see where to insert the screwdriver.
    view full answer...
    Image 1 for
  • Need Replacement Taillights For 2016 Boatmate Trailer
    Hey Tom, thanks for reaching out. We should have lights for you, but there is no way for me to use the trailer SN to look up exactly what you will need. Trailer manufacturers just aren't that specific with their online literature. Looking at pictures of these trailer online, the tail lights appear to be an oval recessed mount light like part # TLL12RK. These are 7-9/16" long x 3-5/16" tall overall including the grommet so please measure and confirm this matches what you need. I also...
    view full answer...
  • Optronics Thinline LED to Replace a TecNiq T16
    I have a solution for you but we do not carry the TecNiq T16. I recommend the Optronics Thinline LED Trailer Tail Light - Stop, Tail, Turn - Submersible - 15 Diodes - Red Lens item # STL64RB. The sonically sealed, waterproof housing and lens unit is submersible. This light has identical dimensions at 20-1/2" long x 1" tall. It has the same three functions with brake, tail, and turn. The Optrionics is a better light with 15 LEDs over the TecNiq T16 13.
    view full answer...
  • What Reflector Ring Fits the LED Trailer Tail Light # STL73RB?
    I confirmed with my contact at Optronics that the reflector ring that you need for the LED Trailer Tail Light w/ Flange - Stop, Turn, Tail - Submersible # STL73RB is the Snap-on Reflector Ring for STL78RB Series LED Lights # A78RXB.
    view full answer...
  • Will I Need any Additional Wiring Or Adapters When Changing to LED Trailer Tail Lights?
    The LED Trailer Tail Light w/ Flange # STL73RB will mount in place of your non-LED trailer tail lights. There are no other parts needed as the tail lights on your tow vehicle will control the flash rate. The lights will work with your older truck just like newer vehicles. The only exception is some Mercedes, Audi and other vehicles which have trailer lamp detectors built in which would confuse LED lights with a bulb being out. Those vehicles would need a Lamp-Out Sensor Bypass Adapter # 20142.
    view full answer...
  • Is There An Amber Version Of The LED Trailer Tail Light STL73RB?
    I have a different option for you, but the LED Trailer Tail Light # STL73RB you were looking at is not available in amber. This is due to tail lights needing to be red to be in accordance with laws here in the USA. The closest amber light is going to be the GloLight LED Side Marker Light # STL175AMFB which is virtually the exact same size at 7-7/8" long x 3-5/16" tall and can be used as a side marker light and a turn signal if you desire. I included a video of the # STL175AMFB for you...
    view full answer...
  • What Circuits Does LED Trailer Tail Light part # STL73RB Cover
    Yes, the LED Trailer Tail Light part # STL73RB does perform function of running light, brake light, and turn signal. The low illumination circuit is for the running lights and the brighter is what activates with the brake and turn signal.
    view full answer...

Do you have a question about this Trailer Light?


Info for this part was:

Employee Lindsey S
Updated by:
Lindsey S
Employee Amanda K
Updated by:
Amanda K
Employee Jeff D
Installed by:
Jeff D
Employee Aidan B
Installed by:
Aidan B
Employee Jameson C
Expert Research:
Jameson C
Employee Jacob T
Video Edited:
Jacob T
Employee Daron K
Edited by:
Daron K
Employee Brian T
Written by:
Brian T
Employee John S
Video by:
John S

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