bing tracking image
  1. Trailer Lights
  2. Optronics
  3. Tail Lights
  4. Round
  5. LED Light
  6. Red
ONE LED Trailer Light - Brake, Tail, Turn - Submersible - Round - Red
Optronics

ONE LED Trailer Light - Brake, Tail, Turn - Submersible - Round - Red

Part Number: STL003RB
In Stock
$8.20
Retail:$27.15
You Save: 70%
Trailer Lights
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
By submitting this form, you understand and agree to our Terms of Sale, Website Terms of Use and Privacy Policy.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

4" Waterproof light displays brake, tail, and turn signals on your trailer. It mounts in a cutout with a grommet (sold separately) and works with 3-prong plugs. Great Prices for the best trailer lights from Optronics. ONE LED Trailer Light - Brake, Tail, Turn - Submersible - Round - Red part number STL003RB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (81)
  • Q & A (0)
  • Videos (2)
  • Photos

Optronics Trailer Lights - STL003RB

Highlights

  • One Light, 3 Functions: Provides brake, tail, and turn signals so your trailer stays visible.
  • Reliable In Any Weather: Waterproof design keeps moisture out—ideal for boat trailers.
  • Fewer Replacements Needed: Single LED uses less power and lasts longer than bulbs.
  • Simple Power Hookup: Works with standard 3-prong PL-3 plug for easy wiring.
  • Seamless Mounting Option: Fits recessed grommet mount for a clean, secure install.
  • Road Legal: Meets DOT, FMVSS 108, and CMVSS 108 standards for compliance.

Features to know about

Brighter, Longer-Lasting, and Efficient: LED Trailer Light

If you’re replacing older incandescent lights, this 4-1/8" round red LED light is a big upgrade. It handles brake, tail, and turn signals in one unit and uses a single LED that’s both efficient and durable. At 12.8 volts, it only draws 0.007 amps for the tail light and 0.25 amps for stop and turn signals. That means less strain on your electrical system and no more worrying about bulb failures. The LED comes backed by a lifetime warranty for peace of mind.

Built to Handle Water: Fully Submersible and Sealed Construction

This light is built for tough environments where water is always a concern. Its polycarbonate lens and housing are sealed together to make it completely waterproof—ideal for boat trailers or wet conditions. You don’t have to worry about moisture sneaking in or corrosion shortening its life. Once it’s installed, it keeps working no matter how often you launch or drive through rain.

Clean Mounting Setup: Recessed Design with Grommet Fit

A clean installation is easy thanks to its recessed-mount style. It fits into a cutout using the A45GB grommet (sold separately) for a snug, professional look. The design keeps the light protected and out of the way while still providing excellent visibility. If you prefer not to cut a hole, there’s an optional BK45BB mounting bracket that works with the same grommet.

Straightforward Wiring: Standard 3-Prong Plug Connection

Wiring doesn’t get much simpler than this. The light uses a PL-3 connector that pairs with standard 3-prong plugs such as the A45PB straight or A47PB right-angle pigtails (sold separately). Just plug it in and your brake, tail, and turn functions are ready to go—no complicated wiring diagrams needed.

Rear view of Optronics LED trailer light showing 3-prong PL-3 plug connection for attaching to trailer wiring harness.

Meets DOT Standards: Reliable, Safe Performance

This light is DOT compliant and meets FMVSS 108 and CMVSS 108 requirements, so it provides the reliable signaling performance required on the road. You get the brightness and safety you need in a compact 4-1/8" diameter by 1-3/4" thick package that’s built to last through years of use.

Specs

Dimensions

  • Diameter: 4-1/8"
  • Thickness: 1-3/4"

Dimensional diagram of Optronics ONE LED Round Trailer Light STL003RB showing 4-1/8 inch diameter and 1-3/4 inch thickness for fitment reference.

Electrical

  • Power draw at 12.8 volts (Tail light): 0.007 amps
  • Power draw at 12.8 volts (Stop/turn light): 0.25 amps

Lighting

  • Diodes: 1

Warranty

  • LEDs: Lifetime
  • Housing and lens: 3-Year

STL003RB Optronics 4" Round ONE Series Combination LED Boat Trailer Taillight - Red Lens





Video of ONE LED Trailer Light - Brake, Tail, Turn - Submersible - Round - Red
Video Thumbnail Video Player Dialog

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of the ONE LED Trailer Tail Light

Customer Satisfaction Score:

Ratings & Reviews

4.8

81 reviews
Review sort icon
4" Waterproof light displays brake, tail, and turn signals on your trailer. It mounts in a cutout with a grommet (sold separately) and works with 3-prong plugs.

by:

Nice, bright, submersible lights!



by:

Excellent replacement light for my trailer. Fit well. Etrailer has outstanding prices and ships fast.



by:

LED lights work great on my 73 CJ5. Have had them now for a year and no issues at all. Thanks etrailer.



by:

Just opened box seams to be everything ordered,will install lights over weekend an see if all work ,will let you know.1994 gooseneck be comning new.



by:

led trailer light for my tralor worked grate still going. low price I actually bought two at diferent times and they work grate.



by:

been working great for 1 year.
Led lights
are the way to go.
No more bulb problems



by:

Had a scratch on one of the lenses upon receipt. I notified e-trailer, they handled it right away sending q replacement. It’s nice to see that customer service does still exist. Thank you



by:

Can't wait hooking up that trailer for a nighttime cruise knowing i got my One LED Trailer lights protecting my backside!



by:

Used these lights to upgrade to LED on my triple Axel equipment trailer. Lights are nice and bright. Would have given 5 stars except that since I have ordered these lights I have been bombarded with trailer light advertisements that just won't quit.



by:

I replaced the burned out light on the horse trailer. Very easy to install....Pull the old light out of the rubber casing, unplug, and reverse directions for installation....No Tools Needed!!!



by:

EXCELLENT SERVICE & SHIPPPING WAS FAST TY



by:

The light fit well as a replacement without having to modify the mount. I have not had any problems with the operation but the brightness was a little underwhelming.



by:

Great service as always



by:

The brake lights were installed, and they worked! The price was good, the service and delivery was good. No complaints all was good! :O)



by:

Great product to replace incandescent lamps . Bright and easy to install . Great and easy shopping on website. Quick shipping and low cost shipping too! Will buy again when needed.



by:

Lights worked perfect for my flatbed light upgrade,great price and this company has a nice easy to use website, i only wish they came with a gasket to go between the light and the mounting surface , but with that being said not all builds need to be water tight so i still guve it five stars



by:

Doesn’t come with wiring harness, I was able to find a wiring harness plug that worked on Amazon that was much cheaper than what was quoted from a trailer.



by:

It worked for my burnt out light.I had to adjust some parts of the plug in but fit was perfect and changing to led lights are much brighter.



by:



by:



by:

This is an exact match to my original, so no modification was needed.



by:

Took a little longer than I would have liked



by:

Still going great



by:

Still working great one year later.



by:

exactly the replacement part that was needed worked well with Optronics Right-Angle PL-3 Pigtail to Female Weathertight Plug - 10" Long Item #AL145PWTB. This part enabled us not to have to hardwire a replacement connection


25
25

See what our Experts say about this Optronics Trailer Lights

  • Does etrailer Have 4" Diameter Replacement Lens With No Holes
    Hey Delbert! I looked through all of our replacement lenses and I'm sorry to say we don't have any that match your 4" diameter requirement with no mounting holes. If you can't find them anywhere I recommend replacing the entire light with something like the # STL003RB and # STL003AB. These are the closest match we have at 4-1/8" in diameter.
    view full answer...
  • Replacement Round LED Trailer Tail Light for a Peterson Round Tail Light
    The Peterson part number # 420-15 that you referenced is a replacement lens for the Peterson Round Trailer Tail Light # 431800 which has a 3-3/4" diameter. Although we don't have an exact match to this in LED we do have slightly larger sizes of round tail lights that come as LED. If you are wanting to go with one from Peterson then we have the LED Trailer Light # M826R-7 which has an overall diameter of 5-1/2" but the light diameter is only 4-1/4". The grommet # 426-18 and 3-prong plug...
    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 Amy B
Updated by:
Amy B
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T
Employee Noah M
Updated by:
Noah M
Employee Manda E
Updated by:
Manda E
Employee Carrie F
Updated by:
Carrie F
Employee Amanda K
Updated by:
Amanda K
Employee Tricia G
Written by:
Tricia G
Employee Joshua S
Video by:
Joshua S
Employee Cole B
Installed by:
Cole B
Employee Ryan G
Installed by:
Ryan G
Employee Chris R
Video Edited:
Chris R

At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.


Product Experts Available Now!
Call 1-800-940-8924