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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
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Optronics Trailer Lights - STL2RB
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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. Lowest 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 1-833-496-1390 for expert service.
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  • Reviews (89)
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Optronics Trailer Lights - STL2RB

  • Tail Lights
  • Square
  • LED Light
  • Red
  • 6L x 4-1/2W Inch
  • Surface Mount
  • Stop/Turn/Tail
  • Side Marker
  • Rear Clearance
  • Side Reflector
  • Rear Reflector
  • 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 Reviews

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

Average Customer Rating:  4.7 out of 5 stars   (89 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.


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


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!


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.


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


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.


Looks good and easy installing


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



The tail light was easy to install and is working great.


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!
mking - 06/27/2015


Excellent tail light so far. The length of the wires coming from the light made for easy connections. Looks great so fat, not like the cheap units that came with my trailer. I also liked the quick ordering and delivery process!Thanks etrailer!


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
RCS1611 - 03/18/2018


Fits perfect, has more lights than my current one so it's super bright!


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.

We will be in contact regarding the warranty coverage on these LEDs.
-- Etrailer Expert Patrick B - 12/02/2014


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.


perfect fit for my broken trailer tail light etrailer always does good job


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

They are working great. I am a big fan of LED light for trailers.
Bruce T - 11/15/2017


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 got the part as I requested it to be shipped. Packed Perfectly, No Damage to lens. Part was in stock and was was I needed to replace. Easy done. Thanks etrailer


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.


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.


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.


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.


Having broken my trailer's taillight pulling it out of a tight squeeze, I was happy to get the replacement from in just three days. When I installed it, at first only the parking light and running light worked. I called customer service and was surprised to have a real person answer as it was late afternoon on Saturday. She advised me to buff up the area on the trailer where the ground makes contact. I did and the light came on fine. Great customer service!


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.


I am updating an 11 year old 16 ft. flatbed utility trailer that is in excellent physical condition. Paint, tires, bearings, brakes etc. I got exactly the parts I wanted for a very good price and delivered quickly to my front door...etrailer rocks!

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • 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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  • 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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  • Replacement Square Multifunction LED Tail Light for Towsmart 1400
    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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  • 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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  • Optronics Replacement Combination Trailer Lights Passenger and Driver's Side
    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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  • Recommended LED Trailer Lights to Replace Some Incandescent Trailer Lights on Large Trailer
    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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  • 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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  • Replacement Tail Lights For Peterson Tail Lights With SAE A1ST DOT On Lens
    We have both the Peterson Tail Light Driver Side # PM444L and Passenger Side # PM444 that match what you currently have. Or you can upgrade to LED with the Optronics LED Combination Trailer Tail Light Driver Side # STL3RB and Passenger Side # STL2RB
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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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  • Tow Dolly Replacement Lights
    For your old car dolly, you may be interested in the Replacement Driver's Side Fender for Roadmaster RM3477 Tow Dolly with Electric Brakes - Metal # RM-922004 and # RM-922005. For similar lights you can use the Peterson Square Trailer Tail Light, 7-Function, Left Hand # 432400 and # 432200. For light from the sides instead of reflectors, you can use the Over 80" Wide, Square LED Trailer Tail Light, 7-Function, 18 Diode, Right Hand # STL2RB and left hand # STL3RB.
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  • Replacement Lights and Trailer Harness for SnowBear Trailer
    To replace the wiring harness on your Snowbear trailer you can use the Hopkins Endurance 4-Way Flat Trailer Wiring Harness - 20' Long # HM48240, which is a nice option since it gives you running light circuits running down both sides; this will make wiring everything in easier. If you also want to replace the lights with LED lights, you will need to swap all lights on the trailer to avoid issues with combining LED and incandescent lights. To replace the tail lights I recommend using the...
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  • Fender and Trailer Light Recommendations for a 7 x 10 foot Utility Trailer
    After looking at all the lights you referenced you should be good for trailer lights on your 7 by 10 foot utility trailer. You might check your local DOT though just to be sure as regulations can vary by area. Single Axle Trailer Fender - 16 Gauge Steel - 13inch to 14inch Wheels # HP69VR Over 80inch Wide, Square LED Trailer Tail Light, 7-Function, 18 Diode, Right Hand # STL2RB Over 80inch Wide, Square LED Trailer Tail Light with License Plate Light, 8-Function, 23 Diode, LH # STL3RB LED...
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  • Options to Replace Square Tail Lights with LED lights for Over 80 Inch and Under 80 Inch Trailers
    If your trailer came with the square Peterson lights then you can use the Submersible LED Trailer Light Kit, # TLL9RK. The Over 80 designation that you see is a federal guideline for trailers that are over 80 inches wide, and extra lighting is required for these trailers. You should check federal and state lighting guidelines if you are not sure that your trailer has the correct lighting installed on it. At this time we do not have an LED version of the Over 80 inch square tail light...
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