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LED Combination Trailer Tail Light - Submersible - 7 Function - 18 Diodes - Square - Passenger Side

LED Combination Trailer Tail Light - Submersible - 7 Function - 18 Diodes - Square - Passenger Side

Item # STL2RB
Our Price: $24.85
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Shipping Weight: 0.76 lbs
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6-1/8" x 4-9/16" Square. Waterproof LED tail light acts as brake, tail, turn, side marker, side reflector, rear clearance, and rear reflector for trailers over 80" wide. Stud mount - includes hardware. 3-Wire design. 18 Diodes. Great Prices for the best trailer lights from Optronics. LED Combination Trailer Tail Light - Submersible - 7 Function - 18 Diodes - Square - Passenger Side part number STL2RB can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (111)
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Optronics Trailer Lights - STL2RB

  • Tail Lights
  • Square
  • LED Light
  • Red
  • 6-1/8L x 4-9/16W Inch
  • Surface Mount
  • Rear Clearance
  • Rear Reflector
  • Side Marker
  • Side Reflector
  • Stop/Turn/Tail
  • Non-Submersible Lights
  • Optronics

6-1/8" x 4-9/16" Square. Waterproof LED tail light acts as brake, tail, turn, side marker, side reflector, rear clearance, and rear reflector for trailers over 80" wide. Stud mount - includes hardware. 3-Wire design. 18 Diodes.


  • Square LED combination tail light serves 7 functions on trailers over 80" wide
    • Stop, tail, turn, side marker, side reflector, rear clearance, and rear reflector
  • Sonically sealed, waterproof housing and lens unit is submersible
  • Built-in reflector removes the need for a separate reflector
  • 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 plastic housing
  • Red acrylic screw-on lens
  • Compatible with 12V DC systems
  • Stud mounts to trailer with included studs
  • 3-Wire design hardwires to trailer
  • DOT compliant


  • Configuration: passenger side
    • Driver side: STL3RB (sold separately)
  • Dimensions: 6-1/8" long x 4-9/16" tall x 2-7/8" thick
  • Distance between mounting studs (center on center): 2"
  • Diodes: 18
  • Power draw at 12.8V:
    • Stop/turn: 0.268 amps
    • Marker: 0.059 amps
  • Lifetime warranty on LEDs

Optronics STL2 Series LED Combination 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.

Combination Lights for Trailers Over 80" Wide

Flatbed trailer over 80" wide with combination tail lights

If a trailer is 80" or wider at its widest point, then it requires rear clearance lights in addition to basic trailer lights. These clearance lights indicate the width of the trailer when it is viewed from the back.

To meet these requirements on a flatbed utility trailer where the bed extends past the wheels, you can install combination trailer lights that include the rear clearance function. For proper mounting, the lights must be installed at the widest points on the rear of the trailer - one on each corner.

STL2RB Optronics LED Combination Tail Light for Trailers Over 80" Wide - Submersible - 7 Function - 18 Diodes - Square - Passenger Side - Right Hand

Alternate part number: STL-2RB

California residents: click here

Customer Satisfaction Score:

Customer Reviews

LED Combination Trailer Tail Light - Submersible - 7 Function - 18 Diodes - Square - Passenger Side - STL2RB

Average Customer Rating:  4.8 out of 5 stars   (111 Customer Reviews)

6-1/8" x 4-9/16" Square. Waterproof LED tail light acts as brake, tail, turn, side marker, side reflector, rear clearance, and rear reflector for trailers over 80" wide. Stud mount - includes hardware. 3-Wire design. 18 Diodes.


Item arrived quick and in excellent condition would definitely recommend to anyone looking for parts and will also use ETRAILER for my future purchase on parts. Thanks again!!!!! John Rogers


Works great. Exact replacement for the light that I broke. Very satisfied and easy to order.



Identical replacement light came right away and working perfectly one year later.completely satisfied.


Great customer service. Product as ad vertised


Just received and installed this light today. Replaced 7 year old lights on my utility trailer hoping to not have to mess with light bulbs anymore. The light works as it should, it's nice and bright, arrived in a reasonable time frame, was packaged well, and hopefully will last. I have ordered many items from etrailer and have never had a problem.


Haven't installed it yet but looks like exact fit for my trailer


Fast delivery! I've made 3 purchases with etrailer. I would recommend them to my friends. Good prices and prompt delivery!



Fast and easy.


Arrived quickly and was a perfect match to the broken tail light assembly


The product was promised earlier than it arrived and there wasn’t any padding to protect the taillight during shipping. This problem should be easily corrected but will it be


Works perfectly and was easy to install.


Is a replacement for broken tail light on utility trailer! Love the led taillights! Was shipped promptly from you guys also! Thanks much!



Was an exact replacement only different brand and has held up well! Very nright and easy replacement!


Great light. Arrived quickly and performs flawlessly. I've had other trailer lights that the bulbs would short out or the bulbs would bounce loose with the vibrations of the trailer, but this one. It is still burning strong after a year of road use. It's also very bright, easy to see in daylight.



3/18/18 Light still works great. My trailer is in constant use hauling tractors and UTVs back and forth. Even with all that road use and some off road use the light still works properly. What more could you ask for than a product that does what it is supposed to do. Thanks etrailer


Wonderful customer service! Highly reco mmended!


The lights failed on my boat trailer after just 4 uses despite unplugging from the car when entering the water for launching the boat. Now only half of the LEDs light.

Etrailer Expert

Patrick B.


We will be in contact regarding the warranty coverage on these LEDs.


We have a car trailer we pull behind our RV. Lights died after just a year. I bought these as a replacement ... fit and look great.

I have ordered several lights and lenses from etrailer.

In stock, good price and fast shipping .. what more needs to be said.


Replaced the old taillights with incandescent bulbs on our old cargo trailer as they just weren't bright enough to see easily in bright daylight. These LED taillights fixed that problem - they are easily seen at any time of day or night! And , as always, etrailer was great to do business with - I especially like how well they keep me posted on my order status.


Haven’t installed this one yet, but it replaces an identical light that I have destroyed and there were no issues with how it installed or operated.


They work great. LED's are such a good way to go for trailer lights.

Bruce T.


They are working great. I am a big fan of LED light for trailers.


Excellent communication during shipment. The product was correct and price was good.


The LED trailer lights arrived as promised. These lights are a huge improvement over the original lights installed on the trailer by the trailer's manufacturer.


Had a damaged light on my trailer and decided to go with LED this time, so I replaced both sides. Very easy to install. Wires were color coded and matched my harness. Looks and works great. I was not able to find the LED in 80" plus size in local store for some reason. Only could find the 80 and under model. etrailer came through for me. Would buy from them again.


I received two lights for my birthday last September. I installed them on my trailer in October. The lights looked great, very bright. However, one of the lights had the side marker light go out. Since you can not replace the bulb I have purchased this replacement and will see if I have better luck with it. I will let you know.


All ordered items worked great. Love the LED tail lights. Didn't have any problems fixing the trailer thanks to the many technical articles I found on etrailer. Not sure what happened with UPS shipping since I got notified that the parts had shipped on Saturday but didn't get them till Wednesday evening (paid extra for 3 day shipping), but definitely recommend ordering from etrailer.


Product was as described and exactly the same light I was looking for. The price was a bit high, however that’s to be expected with an LED saltwater trailer light. Overall I am very pleased with my product and installed it quickly. I would highly recommend etrailers!


I just installed and tested them. They installed quite easily.
They are nice looking and bright.
They seem to be well built.
We'll see how these are after a couple years.
My last set were also L.E.D. type (but not this brand).
I thought, barring any accidents, they would last many years.
They didn't.
They did last longer that the incandescent type though.
Vibration seems to be the biggest enemy for trailer tail lights.

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • Version of the License Plate Light part # STL2RB with License Plate Light Below it
    The matching drivers side light to the part # STL2RB which is part # STL3RB has the license plate light underneath it like you need.
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  • Recommended Replacement Driver & Passenger LED Combination Trailer Tail Lights
    I don't see why you couldn't use the LED Combination Trailer Tail Light # STL2RB upside to replace your driver side light. The only thing that might be weird is how the light will mount to the trailer physically since you're using the passenger light on the driver side, other than that you should be fine. If all else fails, you could always just use the driver side light # STL3RB and not hook up the license light wire.
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  • How Waterproof is the Over 80" Wide, Square LED Trailer Tail Light # STL2RB
    The Over 80" Wide, Square LED Trailer Tail Light # STL2RB that you referenced is designed to be a submersible light. What that means is that once you got to the boat ramp you would want to disconnect your trailer wiring from your tow vehicle and then you could back your boat trailer into the water and the lights will be totally fine. The LEDs are sealed so that water would not get to them. This light would be exactly what you need. For the left hand side you would want part # STL3RB.
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    Thanks for the picture. I found a great replacement tail light combo for you. I recommend the Optronics LED Combination Trailer Tail Light - Submersible - 7 Function - 18 Diodes - Square - Passenger Side item # STL2RB. And driver's side item # STL3RB. These are 6-1/8" x 4-9/16" Square. They are waterproof LED tail lights that act as brake, tail, turn, side marker, side reflector, rear clearance, rear reflector, and license plate lights for trailers over 80" wide. Stud mounted and they include...
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  • Troubleshooting Installation of Optronics # STL2RB and # STL3RB
    There are two possibilities that are outside the box of thinking, however, are very relevant to your lights not working and there are a couple of standard reasons why your lights may not be working. The first thought is the actual specs on your factory 7-way. It seems as if you have a lot of lights on your trailer, and although some of them are LED which use substantially less power, check the capacity of the connector and then add the usage up of the lights - you may be over capacity...
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  • Drivers Side Light To Match Passenger Side STL2RB
    The driver's side light that matches the LED Combination Trailer Tail Light part # STL2RB is part # STL3RB. You do not want to flip the passenger side light upside down because it has a license plate light. I recommend to use the driver's side light.
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    I pulled up some pictures of the 2020 carry-on 6ftx12ft dump trailer online and based on what I could see the taillights are the part # STL2RB for the passenger side and # STL3RB for the driver side.
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    For a replacement passenger side tail light for your Towsmart LED light I recommend using the LED Combination Trailer Tail Light - Submersible - 7 Function - 18 Diodes - Square - Passenger Side # STL2RB because of the high quality you get with Optronics lights (check out all of the 5 star reviews). This light measures 6-1/8" long x 4-9/16" tall x 2-7/8" thick and is submersible, so it would also work on a boat trailer if that is your application. If you also need a driver's side light you...
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    You absolutely can mix LED and Incandescent lights on your trailer. For your PM444 replacements, I recommend the Optronics Over 80" Wide, Square LED Trailer Tail Light, 7-Function, 18 Diode, Right Hand # STL2RB and Left Hand # STL3RB. The LED lights will draw less power and will also get rid of the bulb replacement hassle you mentioned. In rare cases you may experience hyperflashing with LED lights. If this happens when you install these lights, you can simply add a load resistor...
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  • Troubleshooting Trailer Tail Light Not Working On New Utility Trailer
    What you are experiencing is common with ground connection issues. Before you get new tail lights you will first want to find the ground connection. This is generally a screw or bolt that is mounted to the trailer. It is common for trailer builders to use the mounting hardware for the tail lights to make the ground connection. They often will not actually clean the paint off where the wire connector meets the frame and rely solely on the screw to carry the current. This is generally not...
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  • Does the Replacement Tail Light Lens # AL8RB-1G Go to a Light with License Plate Function
    The Replacement Tail Light Lens for STL2RB and STL3RB # AL8RB-1G is a replacement for both the Optronics Right Hand # STL2RB and Left Hand # STL3RB lights as is indicated by the title. The part # STL3RB does have the license plate light function built-in to it.
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  • Square LED Trailer Lights and 5-Way Wiring Harness for a Wesco Boat Trailer
    Over or under 80 means 80 inches of width. There are certain lighting requirements if the trailer is more than 80 inches wide. Trailers that are less than 80 inches wide can still use lights that are indicated as over 80 inch. Since you need a 5-way wiring harness I recommend getting the lights separately, # STL8RB and # STL9RB, and then getting # A25W5B for the harness. This is a 5-Way wishbone harness. That means that the running light pin has 2 wires for running lights on each side...
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  • How to Wire Optronics STL2RB Tailllight on Carry On Trailer
    I don't have any available database that would tell me if the # STL2RB would be the exact replacement taillight for your trailer. The trailer manufacturers don't do as good of a job keeping track of that as the vehicle manufacturers do. This being said, the # STL2RB is extremely common, and if the dimensions of your existing taillight match those in the diagram I provided, there's every reason to believe that it's the correct replacement. The Optronics # STL2RB has three wire leads exiting...
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  • Options to Replace Square Tail Lights with LED lights for Over 80 Inch and Under 80 Inch Trailers
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