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LED Combination Tail Light Kit for Trailers under 80" Wide - Submersible - Driver and Passenger

LED Combination Tail Light Kit for Trailers under 80" Wide - Submersible - Driver and Passenger

Our Price: $49.58
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Shipping Weight: 2 lbs
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Waterproof trailer light kit includes 2 combination tail lights that serve 7 functions on trailers under 80" wide. Stud mount with stainless steel hardware and included license plate bracket. 25' wiring harness with 4-pole connector. Great Prices for the best trailer lights from Optronics. LED Combination Tail Light Kit for Trailers under 80" Wide - Submersible - Driver and Passenger part number TLL9RK can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (506)
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Optronics Trailer Lights

  • Tail Lights
  • Square
  • Kit
  • LED Light
  • Red
  • 5L x 5W Inch
  • Surface Mount
  • License Plate
  • Rear Reflector
  • Side Reflector
  • Stop/Turn/Tail
  • Submersible Lights
  • Optronics

Waterproof trailer light kit includes 2 combination tail lights that serve 7 functions on trailers under 80" wide. Stud mount with stainless steel hardware and included license plate bracket. 25' wiring harness with 4-pole connector.


  • Square combination tail lights serve 7 functions when properly mounted on trailers under 80" wide
    • Stop, turn, tail, side marker, side reflector, rear reflector, and license plate light
    • Built-in license plate light on driver's side light
  • Sealed, waterproof construction is submersible
  • Durable surface-mount diode (SMD) construction of LED circuit board
    • Better withstands shock and vibration
    • Allows for improved heat distribution
  • LEDs make great replacements for incandescent lights
    • No bulbs to replace
    • No brittle filaments
  • Corrosion-resistant license plate bracket
  • Durable polycarbonate housing and acrylic lens
  • Red lens over clear LEDs
  • Stud mount
    • Stainless steel mounting hardware included
  • 25' Wiring harness with 4-pole connector
  • DOT approved


  • Application: trailers under 80" wide
    • Driver side: STL9RB
    • Passenger side: STL8RB
  • Light dimensions: 5-1/16" long x 4-9/16" tall x 2-5/8" deep
    • Light face: 4-9/16" x 4-9/16"
  • Distance between mounting studs (center on center): 2"
  • Diodes:
    • Driver's side: 14
    • Passenger's side: 11
  • Power draw at 12.8 volts:
    • Stop and turn lights: 0.259 amps
    • Side marker lights: 0.062 amps
  • Lifetime warranty on LEDs

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 circuit board is sealed, which means that water will not damage the diodes or circuit board.

TLL9RK Optronics LED Combination Tail Light Kit for Trailers under 80" Wide - Submersible - Driver and Passenger - 25 Ft Harness - Stud Mount

Alternate part number: TLL-9RK

Item # TLL9RK

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Customer Satisfaction Score:

Customer Reviews

LED Combination Tail Light Kit for Trailers under 80" Wide - Submersible - Driver and Passenger - TLL9RK

Average Customer Rating:  4.8 out of 5 stars   (506 Customer Reviews)

Waterproof trailer light kit includes 2 combination tail lights that serve 7 functions on trailers under 80" wide. Stud mount with stainless steel hardware and included license plate bracket. 25' wiring harness with 4-pole connector.


Green lights, super reliable, even dunking in saltwater on the regular. Only negative would be if you buy the set like this the configuration of lights is different than if you buy in singles for replacements the LEDs on the newer bulbs are a different shape pattern.


All went well except the ground wire was short on the trailer harness, had to splice a piece in.
Manufacture should consider making it another 12-18 inches longer.



Working great!


Complete kit even comes with wire holder clips for trailer frame.


The TLL9RK Optronics LED Combination Tail Light Kit fit my old 4 foot by seven foot utility trailer perfectly. The lights are much brighter than the OEM incandescent units. I used crimp connectors instead of those supplied in the kit. I like the plugs that came with the new wiring harness, as they appear to seal much better when the trailer is connected to the tow vehicle. I only wish the kit included a blanking seal for each plug to help keep them clean and dry when not connected, as they spend most of their time unplugged and open to the weather.



A great product, the light kit is working well after a year with no problems.


Love the lights. I would give them five stars all day long. The wiring harness is a bit chintzy. More like 2.5 stars. It feels like if the manufacturer spent another .02 on it the quality would be better. If you paint your trailer, you need to grind away the paint beneath the ground wire, otherwise they will not work.


I believe I must have received a returned product? It was missing hardware listed in the description. Luckily, I had some lock nuts that fit the mounting bolts of the lights and was able to successfully install the kit on my small trailer without having to make a trip to the hardware store or wait for etrailer to send out some replacements. I believe this was a “fluke” and if in need, I would certainly order a similar product again.


I changed out all of my trailer lights to LED and they work great!


The products are fine... the order processing and shipping were unbelievably fast... The one "downer" was that the lighting kit was put in the box without any additional packing/cushioning... the package split open and the contents of the kit were scattered among the tires... luckily, the lights/parts appear undamaged, as far as I can see... I have yet to install the kit and test it...


they quick the first time they got wet!

Etrailer Expert

Jenny N.


I am sorry to hear that the lights are no longer working for you. They are meant to be submersible and should have been fine in water. Do you still have the lights? I can send you the warranty details for them.



@JennyN Thank you for your response, I do not have them anymore they sat around for a bit and just through them away. My customer was upset posted photos on Facebook I did make him happy same day he called me I had a better set of lights that we installed and got him on his way. John


When my 7 year old utility trailer lost it's lights, I looked for a solution. The package came quickly and was easy to install. It was a good idea to include the wiring kit along with the Lights because I installed the lights first and discovered that the problem wasn't solved. I then rewired the entire harness and it all works well. I would recommend one change - instead of the wire nuts, add a waterproof heat sealing connection - I soldered my wire connections using a heat shrink wrap. Also - waterproof tap in connections for the side running lights would be helpful.


Arrived when scheduled. Installation was easy and they seem to be built well. Bright in sunlight. We'll see how they hold up. Could have used a few more wire clips-had to reuse some of the old ones.


Works great however I didn't look close enough to the connection. I was hoping for 1 with 7blade connection and brake cable


This kit has all the parts needed to replace the old trailer lights. The hard part is removing the old, rusted bolts holding on the old lights.


Adam personally looked at equipment I needed to answer my questions. I placed order on phone with him and it was packaged and processed and with shipping co. within hours. My installer said it was best choice so reaffirmed my selection. Gotta say the customer service and shipping guys were really moving and it was Memorial weekend. Can't imagine I'd use another company with such a great experience with this one. So far so good on the light kit, only submerged one day since installed but based off my installer and reviews I think I made the right choice. Will post updates if needed.


Always the best of quality and most complete package of trailer light replacements which is why I go to and am a repeat customer. These folks could write the book on how to give outstanding customer service and their people always friendly, professional and knowledgeable. This company is always a pleasure to do business with !!!!


Easy to install. There was plenty of length of wire to make the connections. Work great and looks great. Thank you.



Everything is working with no issues. Extremely happy with the lights.


No issues after a year of use. Still works great.


It fit perfectly. Safe to use now. Than ks.


Wish I had changed to this technology many years old instead of constantly battling with the original bulb setup. I've had these on my trailer for about a year now and they've functioned flawlessly. For the cost and ease of installation, it's a no-brainer to go to LED lights.


Very nice lights, thank you George at etrailer for contacting me and telling me I ordered incandescent lights instead of LEDs, that was greatly appreciated, because I wanted LEDs all along, I just ordered the wrong part.


The product is exactly what was listed on the website and the quality is great. I looked at Walmart, a local marina and a local part store for trailer lights. These lights I got from are better quality and a better price including shipping. It was delivered faster than expected. I was so pleased, I purchased more product from etrailer the next day.


Rebuilt an old boat trailer. Had it powder coated and I needed a whole new light harness. This worked really well and looks good too.


Seamless transaction and gorilla-with-a-crayon installation instructions. Simple and smooth... doesn't get better than that. Phooey, I even got to talk to a real-live-helpful person!. And the box arrived like magic on my porch like a package under the Christmas tree. Would I do it again.... I already did, with another order. And I'm talking to others about my good experience.


Bought this product to replace my incandescent lights on my boat trailer with led lights. Price was right. I have not installed them yet but I'm sure they will work fine as with anything I've purchased from etrailer so far.

Joseph P.


I installed the Led Lights on my Trailer and they work Great.. The led lights are much brighter then the incandescent lights. I placed my lights on the back of the trailer where they do not get submerged when ping off my 17 FT Boston Whaler.. I do not need the back my trailer in the water all the way.. I usually back the trailer where the water is just below the hub bearing..Will definitely recommend this trailer light kit to anyone looking to replace their lights led lights and wiring.


I bought this light set to replace the cheap, problematic light set on a trailer from Tractor Supply. Installation was straightforward, and the light have been working well.

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • Newly Installed Trailer Light Kit Not Working Behind a 1998 Ford F-150
    Which grounds did you check? There are at least 4 ground connections that you need to make sure are working. One at each of the lights, the ground wire that goes from the trailer frame to the trailer connector, and the ground that goes from the vehicle frame or body to the vehicle connector. Any of these grounds could be the culprit. Remember, paint and rust can insulate these ground connections so make sure the eye terminals have direct metal contact. If everything else is wired properly...
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  • Can LED and Incandescent Trailer Lights both Be Used at Same Time
    A trailer can very easily have incandescent and LED lights at the same time. There is no issue mixing the two styles of lights. If you added the trailer lighting kit part # TLL9RK that you referenced to your trailer you'd have no problems at all. I attached an install video for this kit for you to check out as well.
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  • Should Hole Where Wires Come Out Of Submersible Trailer Light Be Sealed With Silicone
    There is a lot of confusion when folks say submersible or waterproof. The difference is that submersible lights will have a small hole that allows the water to drain out if the light has been submersed in water. Waterproof is a sealed light that will not allow water into the a light assembly. It is always a good idea to disconnect the lights before backing a trailer into the water just to make sure. You can use silicone to seal around the wires on the back of the light. Any extra...
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  • Troubleshooting Trailer Taillights that Dont Blink When Running Lights are On
    What it sounds like is going on is that you have the wires from your trailer run backwards to the two illumination circuits of your trailer. This would explain why when the running lights are on the blinkers and stop lights aren't functioning. Since the harness of the lights has three wires you will need to make sure you are using all three of the wires. The running lights of your trailer should run to the wire on the lights that activates the lower intensity and the stop/turn circuit...
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  • Taillight Kit Recommendation for Holmes Utility Trailer
    The picture of your Holmes utility trailer did not make it through but from the pictures I found online of the Holmes utility trailer it looks like it uses standard style trailer lighting just like the LED Kit part # TLL9RK that you referenced. I attached a review video for this kit on a similar utility trailer for you to check out as well. If your lights look different try sending me the picture again and I can take a look and come up with a different solution if needed.
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  • Troubleshooting Running Light Function on Trailer with 2008 GMC 1500
    For your 2008 GMC Sierra 1500, I do recommend checking the running lights pin on your 7-way. That will let you know if there is a trailer issue or a truck issue. This pin is located at the 11 o'clock position. There is a trailer park lamp fuse #25 in your underhood fuse block. If that checks out, then you will want to check the function of your lights you can simply connect a jump wire to each wire for function. It is possible that your 3 wire lights could use that grey wire as a running...
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  • Trailer Wiring Kit Availability for Older Boat Trailer that Measures 22 feet
    Sounds like your trailer has a standard 4-way connector on it with standard type trailer lighting. We definitely have kits that would give you everything you would need. For a very basic kit we have the part # TLL9RK which comes with a 25 foot long harness to connect all of the lighting. This is a very popular option. Since your trailer is 22 feet in length this would come with more than enough wiring that you could trim to length if needed.
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  • Long Lasting Taillight Kit Recommendation for Boat Trailer
    For a long-lasting option LEDs are the way to go as they rarely, if ever, fail. The LED Combination Tail Light Kit for Trailers under 80" Wide # TLL9RK that you referenced is a great option for this. The taillights assemblies are submersible which means they were designed to drain water and the lights themselves are LED which like I said means they'll last a very long time. I attached an install video for this kit for you to check out as well.
    view full answer...
  • Troubleshooting Right Blinker Taillight of # TLL9RK Not Functioning on Trailer
    When a single trailer taillight doesn't want to function the issue is almost always related to the ground of the assembly. What you'd want to do is check the condition of the ground and fix as needed. If you have the # TLL9RK kit that you referenced it grounds through the white wire of the assemblies that normally get ran to the trailer frame. What you can do is run that white wire either all the way back to the main ground of the trailer wiring harness or find a better place to install...
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  • LED Trailer Lights All Light Up and Blink from Side to Side with Turn Signals On
    There are several things that could cause your trailer light to behave like this. The most likely causes are a bad or weak ground connections or a dirty/corroded trailer connector. Make sure that both the truck and trailer side connectors are clean and free of corrosion. Then make sure the main trailer connector ground and the grounds for all of the lights are connected to clean and corrosion free bare metal surfaces. If the trailer has an aluminum frame, tilt bed, or folding tongue or...
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  • Wiring Harness Included with # TLL9RK LED Submersible Light Kit
    There is indeed a wishbone harness included with the # TLL9RK Light Kit. The running light circuit is split into two separate circuits, one for each side of the trailer. I just got done installing this exact kit on my PWC trailer about a month ago. It was easy to install and I really like the brightness and reliability provided by LED lamps.
    view full answer...
  • Brakes Lights on Trailer Don't Work But All Other Light Functions Work
    The issue you are seeing with the lights on your trailer can be traced back to 2 different things; you have a weak or poor ground connection for your brake lights, or they are drawing too much power on that circuit. Check the grounds on your brake light circuit (including on your vehicle side) and make sure they are solid and connected to a clean, bare-metal surface. Even some paint can cause some issues. If that all looks good then try disconnecting the lights one by one and testing...
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  • Do LED Trailer Taillights Cause Issues for Dodge Ram Truck
    If you install LED trailer lights you will be just fine. The only time LEDs cause issues for vehicles is if the LEDs are getting installed on the blinker circuits of the tow vehicle or if the vehicle is a German vehicle and the trailer taillights are LED. For your situation you'd have nothing to worry about installing trailer LED lights like the # TLL9RK.
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  • Wire Gauge Used On Optronics LED Trailer Light Kit # TLL9RK
    The Optronics Submersible LED Trailer Light Kit # TLL9RK referenced in your question uses 20 gauge wire for the included 25 foot wiring harness. This is a really nice light kit that also includes two stud mount, waterproof LED tail lights and the needed mounting hardware. I have attached a couple short video demonstrations on this kit that you can also check out.
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  • Wishbone Wiring And LED Trailer Lights For Trailer
    When choosing wishbone wiring for your trailer you will want to know how long the harness needs to be. I have attached a link to our product page for the wishbone wiring and harnesses we offer you can check out. As far as the lights you need for your trailer you can take a look at the linked product page I have provided. We have LED light kits that include the wiring harness as well you can choose from. Or you can let me know what size trailer you have and I will be glad to make some...
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  • How Does the Submersible, Under 80" LED Trailer Light Kit part # TLL9RK Wire to Trailer
    For the assemblies that come with the Submersible, Under 80" LED Trailer Light Kit part # TLL9RK that you referenced the white wires will need to be grounded, the brown wires will run to the running lights circuit, the green wire will run to the right stop/turn circuit and the yellow wire will run to the left stop/turn circuit. I attached a picture that has a standard trailer wiring diagram that should be helpful for you. The distance between the mounting studs is 2 inches.
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    Image 1 for
  • Are the mounting screws stainless steel on the LED Trailer Light Kit, part # TLL9RK?
    Yes, the mounting hardware included with the Waterproof, Under 80 inch LED Trailer Light Kit with 25 foot Wiring Harness, part # TLL9RK, is stainless steel and corrosion-resistant.
    view full answer...
  • How Much Power do Optronics Trailer Lights, # TLL9RK, Draw
    On the Optronics Trailer Lights, # TLL9RK, there are 2 different tail light assemblies. The driver side which includes the license plate light, draws a max of 0.254 amps at 12.8 volts (brake/turn lights) and the running lights draw 0.112 amps at 12.8 volts. The passenger side light is a little different since it does not power a license plate light. It draws a max of 0.259 amps at 12.8 volts (brake/turn) and 0.062 amps at 12.8 volts for the running lights.
    view full answer...
  • No Left Side Stop or Turn Signal Lights on Trailer After New Harness Installed
    The most common problem we see with intermittent function in regards to trailer lights are poor grounds. Most likely, this is the issue that you are having as well. Therefore, I recommend you reground the left side tail light whether that be with a ground wire or via the mounting hardware. If the left side tail light still does not work when the ground is re-secured then you might have an issue with a fuse on the vehicle. If you test the vehicle side trailer connector for power that would...
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  • Can LED Trailer Light Kit part # TLL9RK be Backed Into Water on Boat Ramp
    The submersible LED trailer light kit part # TLL9RK is designed to be backed into water like when installed on a boat trailer. We still recommend unplugging the trailer wiring just because water and electricity don't like to mix well. We are aware that a lot of people leave them plugged in without any issue.
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  • What Are the Overall Dimensions of the Optronics Under 80-Inch LED Trailer Light Kit # TLL9RK
    The Optronics stud-mounted LED Trailer Light Kit, part # TLL9RK, features left- and right-hand LED light assemblies that are DOT-approved and waterproof, and includes a 25-foot wiring harness, mounting hardware and connectors, and a license plate bracket. The driver-side light includes license plate illumination. These lights mount using two supplied steel studs (on 2-inch centers) and they use a 3-wire system for electrical connection to your trailer wiring. Each light has a white ground...
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    Image 1 for
  • LED-Type Replacement Trailer Lights for Featherlite Enclosed Gooseneck Trailer
    Trailer makers do not maintain detailed specs on the smaller items like the lights they use in production of their trailers so you can refer to the linked page that displays all of our LED-type trailing lighting. Just click on the type of light you want - such as a side clearance light or a taillight - to see the products in that category. You can use the filters on the page to narrow down the items displayed to those with the shape, color and even the dimensions you need. You can also...
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  • LED Trailer Light Kit # TLL9RK with Stainless Steel Mounting Bolts Recommendation for Salt Water
    This Submersible LED Trailer Light Kit with 25 foot Wiring Harness, part # TLL9RK, uses all stainless steel mounting hardware. The mounting hardware of this trailer light kit should work well in the saltwater conditions that you use your boat in.
    view full answer...
  • Troubleshooting Trailer Lighting that Isn't Grounding Through Aluminum Fender
    Since the fender is aluminum and aluminum does not conduct electricity well you are going to need to run a jumper wire from the ground circuit to the main ground harness of the trailer or if the trailer frame is steel you could run it directly there.
    view full answer...

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