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Optronics LED Trailer Tail Light - Stop, Tail, Turn - Submersible - 10 Diodes - Round - Red Lens

Optronics LED Trailer Tail Light - Stop, Tail, Turn - Submersible - 10 Diodes - Round - Red Lens

Item # STL43RB
Our Price: $11.64
Trailer Lights
Shipping Weight: 0.26 lbs
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Optronics Trailer Lights - STL43RB
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4-5/16" Diameter round. 3-Function, waterproof LED light acts as a brake, tail, and turn signal. Durable polycarbonate housing and lens. Recessed mount with grommet (sold separately). Accepts standard 3-prong plug. Great Prices for the best trailer lights from Optronics. Optronics LED Trailer Tail Light - Stop, Tail, Turn - Submersible - 10 Diodes - Round - Red Lens part number STL43RB can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (121)
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Optronics Trailer Lights - STL43RB

  • Tail Lights
  • Round
  • LED Light
  • Red
  • 4 Inch Diameter
  • Recessed Mount
  • Stop/Turn/Tail
  • Submersible Lights
  • Optronics

4-5/16" Diameter round. 3-Function, waterproof LED light acts as a brake, tail, and turn signal. Durable polycarbonate housing and lens. Recessed mount with grommet (sold separately). Accepts standard 3-prong plug.


  • Round LED trailer tail light serves 3 functions
    • Stop light
    • Tail light
    • Turn signal light
  • Sonically sealed, waterproof housing and lens unit is submersible
  • LEDs make great replacements for incandescent lights
    • Last 50 times longer
    • More efficient - provide brighter light with less power output
    • No bulbs to replace - no brittle filaments
  • Durable polycarbonate lens and housing
  • Red lens over clear LEDs
  • Compatible with 12V DC systems
  • Recessed mount with grommet (A45GB - sold separately)
    • Mounts in any 360 degree position
  • Accepts industry standard 3-prong plug (A45PB or A47PB - sold separately)


  • Dimensions: 4-5/16" diameter x 1-15/16" deep
  • Diodes: 10
  • Power draw at 12.8V:
    • Stop/turn: 0.360 amps
    • Tail: 0.030 amps
  • Lifetime warranty on LEDs

Manufacturer Cross Reference
Light will work as an exact replacement for:
Truck Lite # 44302R
Grote # 53252
Peterson # M417R-2

Optronics STL43 Series Round LED Tail Light Dimensions

Sonically Sealed, Waterproof Trailer Light

The waterproof construction of this light makes it ideal for use on trailers that may be submerged, like a boat trailer. The housing and lens are sonically sealed together to create a single unit, which means that water will not get into the light and damage the diodes or circuit board.

Recessed-Mount Light

Recessed mount light

Recessed-mount trailer lights install underneath a housing or a grommet (A45GB - sold separately). These lights will extend into the mounting surface and require that a hole be cut into your trailer.

STL43RB Optronics LED 12V Combination Trailer Tail Light - Stop, Tail, Turn - Submersible - 10 Diodes - Round - Grommet Mount - Red Lens

Alternate part number: STL-43RB

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Optronics LED Trailer Tail Light - Stop, Tail, Turn - Submersible - 10 Diodes - Round - Red Lens - STL43RB

Average Customer Rating:  4.8 out of 5 stars   (121 Customer Reviews)

4-5/16" Diameter round. 3-Function, waterproof LED light acts as a brake, tail, and turn signal. Durable polycarbonate housing and lens. Recessed mount with grommet (sold separately). Accepts standard 3-prong plug.


Bought these LED Stop/Tail lights for my new dump trailer. The factory stop/tails are mounted very low, and any car directly behind me blocks my lights from the 2nd or 3rd car behind me. So I mounted these new ones up as high as I could to let people know I am stopping or turning. I also mounted a side marker light so I could see where the trailer was while backing up at night. The factory marker lights are so low I can’t see them in my mirrors because they are blocked by the step on the drivers side and the spare tire on the passenger side. I am a retired 18 wheeler driver of 47 years.


We had a trailer that had old Grote anti-theft incandescent lights. The holes for them were right around 4.450” so there weren’t a lot of products we could find that would fit without major modifications. The Optronics lights with the thinner plastic flange mount did the trick! Thanks for stocking this product!


I am in the process of renovating a 1966 Airstream. I wanted to upgrade the tail lights and the clearance lights. I found on a web search. I ordered the round 4" LED, rubber 4" grommet, and Oval LED clearance light. The round stop with grommet adapeted perfectly into the lens on the Airstream. I will feel so much safer now with the added visability. The lights are stellar.


Nice to get just one light by itself when that was all I needed. Great price and fast shipping.


I ordered a number of LED replacement components for my motorcycle trailer as well as a locking hitch pin and ball covers. I was very pleased with the shipment, product quality, and the attention to customer service (which came into play to make sure I did not incur shipping fees). Plus, the LED lights look great on my aluminum trailer. I will happily continue to do business with etrailer!

Jim B.




These light are great quality and shipping was extremely fast. I only needed one but purchased 4 and changed all my brake lights over to LED. I also appreciate the plethora of information with regard to issues installing this item. I had a little trouble fitting them back in my existing grommet, but your videos were very helpful. We have used etrailer several times. It's our go-to. Thanks again!



After about a year of using these brake lights, they are all working well! I took a trip about 600 miles away, and they worked extremely well allowing other vehicles to see my horse trailer and keeping us safe! I would definitely recommend this product to others!


super quick delivery thanks


Ordered two, one had misguided plugs and would not work with my installed 3 prong male plug, the second finally plugged in
with difficulty, but the light worked when installed. Glad I ordered two as just needed one now, and the second was a spare for
future use. All through the order process the company offered great service and very quick shipping. Probably will use them again
in the future for needed parts in a hurry.

Capt T.


As stated, the one didnt work at all and was trashed. The other worked with difficulty plug in was mismatched but is still working.

by: did a Terrific Job for us! We needed tail lights for the Dune Buggy we're building in three different collors (red, amber & clear), and eTrailer was able to provide these for us in otherwise identical lights. We received everything we needed (all of the right appurtanances) and they look great! We were also impressed with the timeliness of's shipping and delivery, as we received our order far more quickly than promised or anticipated. The License Plate Holder and Light also look great! (Although the light is a little dim.) Overall high marks, and I would use and Optronics again.


These lights are perfect! They have more LED's than the lights that came on my trailer and it looks better and is safer when towing at night.

Perfect parts and at a great price!
Thank you!
Scott C.

Scott C.


Perfect part and now a year later still perfect! These are a lot brighter than the old ones for sure and still look great! Excellent value, great service! What a great combination in a supplier! Order with confidence!


While I haven't actually used them on a trip yet, I have to say that installing the LED stop/turn/tail lights was almost a no-brainer. Once I figured out the correct sequence, the lights easily slipped into the existing rubber housings. I plugged in the electrical connectors and they worked perfectly. Knowing that they'll never burn out is comforting.


Although UPS is a little rough on packages, everything arrived unbroken. The only thing I didn't realize was that there was not any pigtails for these tail lights. Everything else was great. I'll see about chasing down the pig-tails from the local trailer dealer.



Have had 0 problems since installed. Much brighter appearance. Have since replaced tail and marker lights with 3 other trailers. Great job guys and gals.


I got two of these because one of the lights on my trailer had been cracked when I lent it out and subsequently the running light no longer worked. The lights that they replaced were standard incandescent bulbs and I didn't like the fact that I couldn't just replace the bulb as they were sealed units like these. Because these are led's I expect them to last quite a bit longer so the fact that they are sealed also is not as much of a problem and in reality should help them last longer.


Tail light assembly for Yakima Rack and Roll trailer. This is a relatively low cost item which includes light bulb sealed in a waterproofed unit. Item was delivered very quickly.


We have been changing out the brake lights on all of our trucks with these led brake lights over the years. They are easy to see during the day and the lenses do not oxidize and wear out like the normal fixtures do. Plus you don't get the melted section in the middle of the light from the bulbs getting hot. Love these bad boys!


This was to replace tail stop/turn light on my 5th wheel. Different pattern but works excellent and is actually a little brighter than what was replaced.

However, service and delivery was absolutely fantastic. Would highly recommend e-trailer service. I will definitely use e-trailer again.


I checked with several RV parts locations in our area including CW and this product was not available. made ordering so easy and what service! I received an immediate order confirmation and the shipping confirmation arrived very quickly too. I just received my delivery and the installation has been completed. Thanks guys for such great customer service!


Extremely pleased with my purchase. I have a set of tow light, needed to replace the LED housing. The manufacturer of my lights did not sell the housing. I would have to purchase the whole thing again. So glad I found etrailer in my search. Housing was just like my OEM housing, and worked perfectly.


Works great. Fast easy shipping.


Good brake and turn signal light. Gave my old trailer some style. has great customer service and will take care of you.


The lights are great. I wish there was instructions on how to install the light and gasket. There must be some trick to it; gasket first then light, gasket and light then install through the sheet metal by pulling the gasket lip through the hole. I did the latter and experienced some gasket tearing. There must be a simple way to do this.


Thanks for the fast shipping of these lights, they fit great and are very bright!


Quick delivery thanks


Had less LED's than what it replaced but was direct fit.


I used this to replace a failed tail light on a Lance camper. It fit in the existing hole just fine. Easy installation, good price, quick delivery.

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

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Info for this part was:

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Video Edited:
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Employee Michael H
Expert Research:
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Employee Adam R
Expert Research:
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Employee Laura H
Updated by:
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Employee Wilson B
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