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Combination LED Trailer Tail Light - Submersible - 6 Function - 11 Diodes - Passenger Side

Combination LED Trailer Tail Light - Submersible - 6 Function - 11 Diodes - Passenger Side

Item # STL8RB
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Trailer Lights STL8RB - Square - Optronics
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5-1/16" x 4-9/16" Square. Waterproof trailer light serves 6 functions: stop, turn, tail, rear reflex, side marker, and side reflex. Durable plastic housing. Stud mount on 2" centers. 3-Wire design. Lowest Prices for the best trailer lights from Optronics. Combination LED Trailer Tail Light - Submersible - 6 Function - 11 Diodes - Passenger Side part number STL8RB can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (383)
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Optronics Trailer Lights - STL8RB

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

5-1/16" x 4-9/16" Square. Waterproof trailer light serves 6 functions: stop, turn, tail, rear reflex, side marker, and side reflex. Durable plastic housing. Stud mount on 2" centers. 3-Wire design.


Features:

  • Square trailer light serves 6 functions
    • Stop light, turn signal light, tail light, rear reflex reflector, side marker light, and side reflex reflector
  • Built-in reflex reflector removes the need for a separate reflector
  • Sealed, waterproof construction is submersible
  • Durable surface-mount technology (SMT) construction of LED circuit board
    • Better withstands shock and vibration
    • Allows for improved heat distribution
  • LEDs make great replacements for incandescent lights
    • Last 50 times longer
    • More efficient - provide better light with less power output
    • No bulbs to replace - no brittle filaments
  • Molded plastic housing and durable acrylic lens
  • Red lens over white LEDs
  • Stud mount with included hardware
  • 3-Wire pigtail
    • White wire is the ground
    • Brown wire is for the tail lights
    • Yellow wire is for the stop and turn lights


Specs:

  • Configuration: passenger's side
    • Driver's side: STL9RB (sold separately)
  • Dimensions: 5-1/16" wide x 4-9/16" tall x 2-5/8" deep
    • Light face: 4-9/16" wide x 4-9/16" tall
  • Distance between mounting studs (center on center): 2"
  • Diodes: 14
  • Power draw at 12.8V:
    • Stop light: 0.259 amps
    • Side marker light: 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.



STL8RB Optronics Combination LED Taillight for Trailers Under 80" - Red lens - 11 Diodes

Replaces STL8R3B

Alternate part number: STL8-RB




California residents: click here



Customer Reviews

Combination LED Trailer Tail Light - Submersible - 6 Function - 11 Diodes - Passenger Side - STL8RB

Average Customer Rating:  4.9 out of 5 stars   (382 Customer Reviews)

5-1/16" x 4-9/16" Square. Waterproof trailer light serves 6 functions: stop, turn, tail, rear reflex, side marker, and side reflex. Durable plastic housing. Stud mount on 2" centers. 3-Wire design.

- STL8RB
by:

My order was received and within minutes I received email that order was shipped. The only thing that slowed delivery was the holiday delivery schedule. My order was received in good condition as ordered. I will do business with etrailer in the future. I was very satisfied with the whole process. 162985


Comments
My led trailer lights are working great. Very good product.
RayP - 12/02/2015

16034

- STL8RB
by:

Bought a set of these for my boat trailer. install was easy and look great 612487



- STL8RB
by:

Installed everything today. Works great! Excellent experience from ordering, shipping, etc. 576339



- STL8RB
by:

Products received in good order. Arrived on time despite ice storm. Thanks folks. 109390


Comments
Product ok. Lights are not very bright. Plastic is very flimsy.
john b - 12/08/2014

7959

- STL8RB
by:

Product is just as described. Fast economy shipping with tracking. This was my first experience ordering with etrailer. It is very nice to know that there are companies still in this world that make customer service a priority. Etrailer has definitely won my business and I will be ordering more from them. 220546


Comments
Still working great. Still look brand new.
Patrick - 08/19/2016

20390

- STL8RB
by:

This is the second pair that I have purchased for a PWC and dirt bike trailer. They are excellent. One of the lenses in the first pair was defective. I called Optronics and they immediately shipped me another. Excellent Tech Support. The lights are very bright and so easy to install. Be sure and secure the ground wire to the trailer frame against raw metal (un-painted and freshly ground), or the lights will not perform properly. Also, the washer provided goes on the fixture side of the trailer mount. Locking nuts secure the light on the opposite side with no washer. 90897


Comments
I have since bought two more for my dirt bike trailer. These taillights are exceptional. They are very well made, easy to install and provide BRIGHT red light. I did have to return one of the lights which was defectivenew. You replaced it right away and I have had no further issues. I would highly recommend. Wish you had lights for my Toy FJ40LandCruiser.....
Steve W - 07/24/2014

5883

- STL8RB
by:

nice tail lights easy to install 859041



- STL8RB
by:

Great lights. 857663



- STL8RB
by:

good 854417



- STL8RB
by:

one of my boat trailer lights broke in storage. I got ready to go fishing and noticed it. Needed it quick and etrailer got it to me so I didn’t miss my trip. Thanks a bunch!!! Howard Buffalo MN 848698



- STL8RB
by:

I purchased this along with the passenger side tail light. It is still working flawlessly. As I said about the other tail light, it is 1000% better than what came on my boat trailer. 826406



- STL8RB
by:

nice product, good deal 822052



- STL8RB
by:

What light doesn't come with butt connectors to install?!?!?! Also the one led on the side marker is sorta dim. They should have added a few more leds there. 821451



- STL8RB
by:

perfect 817642



- STL8RB
by:

Worked great out of the box and easy to install to replace broken light. 816160



- STL8RB
by:

Easy install and product still working with no issues 817108



- STL8RB
by:

I wish the wires were slightly longer which would have helped in my particular installation, otherwise perfect. Great value and quick shipping. 806684



- STL8RB
by:

Fast shipping, LED lights look great on the trailer! 805599



- STL8RB
by:

Product was exactly as expected & works on our trailer perfectly. Shipping was fast. 803925



- STL8RB
by:

Great service. Great product. 800504



- STL8RB
by:

Bright !!!!! top quality lighting 795953



- STL8RB
by:

Easy strait forward wiring, good light, good value. 792372



- STL8RB
by:

nice 790291



- STL8RB
by:

etrailer provided excellent product support and prompt shipping. The LED trailer light I ordered has worked great since since installed over a year ago. I highly recommend etrailer.com based on my experience. Thanks, Rick 785969



- STL8RB
by:

I installed lights on boat trailer in May 2019... Launched boat several times with water covering lights. Stored boat and trailer outdoors all winter of 2019/2020. April 19, 2020 I took boat and trailer to marine shop for maintenance. LIGHTS WORKED WITHOUT AN ISSUE! Thank you for selling a reliable, quality product! 783507


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Show More Reviews

Ask the Experts about this Optronics Trailer Lights

  • Upgrading Camper Lights to LED and Clearance Lights with Brake and Turn Signal Functions
    Yes, you can upgrade to LED lights and have a double light set up in the rear with stop, tail, and turn light functions. But what I need to know is if the camper has the brake lights and turn signals on the same bulb or if it has separate amber turn signals. And if the camper does have combined brake and turn signals do you want to keep it that way or do you want to have separate turn signal and brake light circuits? We have several options for double tail lights, such as # 47-84-610,...
    view full answer...
  • Can Trailer be Swapped to LED Taillights Without Issues
    All you have to do is swap the incandescent bulbs with LED replacement assemblies. Your tow vehicle would not have a problem at all with this switch. In fact, it actually would thank you if it could since now the trailer wiring will draw a fraction of the amperage it once did. So an LED taillight kit like the part # TLL9RK would come with everything you'd need. New assemblies, wiring and connectors.
    view full answer...
  • Driver's Side LED Tail Light That Matches Optronics Combination LED Trailer Tail Light
    The correct Combination LED Trailer Tail Light that goes with the Optronics # STL8RB is the part # STL9RB like what you were talking about. The reason why it has that extra function and the extra diodes is because there is a clear light/lens on the underside of that light which is used to illuminate a license plate. You can definitely upgrade your incandescent lights to LED. This is becoming more and more common simply because LEDs last longer and typically burn brighter so they are...
    view full answer...
  • Why Does the Optronics Driver Side Tail Light STL9RB Have More Diodes Than the Passenger Side STL8RB
    The reason that the Passenger Trailer Tail Light # STL8RB has 11 diodes and the Drivers Side # STL9RB has 14 diodes is because the driver side light has an additional function; license plate illuminator. This is why you see a difference in the amount of diodes. I have attached a picture of the underside of the driver side light so you can see the license plate illuminator. I have attached some review videos as well as an installation video for you to check out.
    view full answer...
  • Troubleshooting New LED Trailer Tail Lights Not Working as Running Lights
    If I understand correctly it sounds like the new red tail lights on your trailer aren't powering on with the running lights circuit, but the amber lights are. You appeared to have wired everything correctly so that the red lights function as turn/brake signals. If these functions aren't working either, please let me know. If the red tail lights also need to serve as running lights then they will need to be wired to the brown wires from the wishbone harness on each side of the trailer...
    view full answer...
  • Can Combination LED Trailer Tail Light # STL8RB be Installed on Either Side of Trailer
    You would be totally fine to use the Combination LED Trailer Tail Light # STL8RB on both the driver and passenger side of your trailer. You'd just need to flip it over like you mentioned and you'd be fine. It will function the same installed on either side. The only reason there's a driver and passenger side is that the driver side typically has a license plate light on the bottom of it.
    view full answer...
  • Troubleshooting Trailer Light Assemblies that Do Not Function on Right Side of Trailer
    I know you said you checked the grounds, but if the assemblies and bulbs are good and the lights are still not activating then problem has to be the grounds. I would try running a separate ground wire from the assemblies back to the main ground of the trailer harness to see if that fixes the problem. First thing you should do at this point is test the 4-way of the wiring harness with a circuit tester part # PTW2993 for voltage on all of the right pins when the taillight signals are being...
    view full answer...
  • Portable Magnetic Lights Recommendation For Trailer
    We do offer some magnetic lights that may work well for you. I recommend the MaxxTow Magnetic Tow Lights, part # MT70097. These have the red lights which act as running lights, brake lights and turn signals. The amber lights which are on the opposite side act as emergency flashers. These lights have LEDs which have increased brightness and draw less power. These magnetic lights come with a 20 ft long wiring harness and the 4-way plugs.
    view full answer...
  • Wiring Trailer To Separate Turn Signal From Combined System
    You can add a converter to the trailer wiring to separate the brake and turn signals. You will also need to add an amber turn lights to your trailer. You can use the tail light converter, part # 118158. This will separate the turn signal circuit from the brake light circuit. This should be installed on the trailer in a way that keeps it protected from the elements. You will need to use the wires from your trailer wiring harness and attach them in the following manner. Attach the right...
    view full answer...
  • How to Wire LED Replacement Trailer Lights
    If you are looking at and LED Trailer Tail Light like part # STL8RB, then you will not need a converter to make it compatible with the 4-Way Wiring Harness on your truck. You will need to figure out the wiring on your trailer to make sure that you get all of the wiring done correctly. You can use a Circuit Tester # I26 for that purpose. All you have to do is hook up your new LED lights using the following information. Brown is for tail lights Green is for stop and turn White is...
    view full answer...
  • Can Tow Vehicle with LED Lights Connect with Trailer that has Incandescent Lights
    Assuming the lights and wiring on your older trailer are in good condition you will not have any issues connecting with and powering its standard incandescent lights with a tow vehicle that is equipped with LED lights. The difference in light assemblies used on the vehicle and trailer will not cause any problems with function or power. If you can tell me the year, make, and model of your tow vehicle I will be happy to recommend a trailer wiring harness if you don't already have one...
    view full answer...
  • Comparing the Power Draw of LED Trailer Tail Light STL8RB and Incandescent Version ST8RB
    LED lights draw considerably less amperage than incandescent lights. They also run much cooler. These 2 features are why LED lights last so long. The incandescent version of # STL8RB is # ST8RB and it draws 2.5 amps for the stop/turn signal functions and 1 amp for the running light functions. And the LED version draws 0.259 amps for stop/turn functions and 0.062 amps for running light functions.
    view full answer...
  • How to Wire Optronics Right Hand LED Trailer Lamp # STL8RB
    The Optronics LED Trailer Stop, Turn and Taillight you referred to, part # STL8RB would install on the right or passenger side of the trailer and would wire as follows: The white wire would ground to the metal trailer frame The brown wire would connect to the running light circuit The green wire would connect to the right turn/brake lamp circuit. The # STL9RB would install on the left side of the trailer, and would wire as such: White wire grounds to trailer frame Brown wire...
    view full answer...
  • Troubleshooting Left Blinker Not Working on a Trailer
    It really sounds like the ground is not making good enough contact on the left turn signal/tail light and because of that it is able to draw enough amperage to illuminate the blinker function of your bulb. There is a chance the converter box of your setup could be wrong, in order to test that you will need to test for voltage coming into the box and then for voltage coming out of the box with circuit tester like part # PTW2993 . If you find that there is voltage going into the box on...
    view full answer...
  • Troubleshooting why an S and H Trailers Brakes Will Not Disengage
    It sounds like the issue is somewhere in the wiring of the connector that was lost and had to be replaced. It sounds like you may have the 12-volt power source swapped with the brake output circuit on the trailer connector. That would explain why your brakes are on all the time. The first thing I would check would be the brake output circuit on the trailer side of the connection. I would check for voltage on the brake output circuit on the truck side of the connector first to see if...
    view full answer...
  • How Do I Convert My Incandescent Trailer Lights to LED Lights
    Yes, you just have to remove the old lights, match the wires and mount the new ones. Please note, that it is usually not a good idea to mix LEDs and incandescent lights, so if you have have side markers or other lights on the trailer, make sure you switch those to LEDs as well. Incandescent lights draw much more amperage than LEDs do, and if they pull that current through the LED fixtures, the LEDs could burn up. We have LED side markers and clearance lights like part # MCL36AB and...
    view full answer...
  • Raft Trailer Left Tail Light is Brighter and Turn Signal Does Not Work with Vehicle Lights On
    Even though you have checked the grounds this does still sound symptomatic of a ground problem. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light. Also make sure that the new light wires are connected to the correct wires on the trailer. The back of the light housing should indicate the function of each wire. For example, light # STL9RB uses yellow for left turn...
    view full answer...
  • Troubleshooting Right Side Trailer Running Lights Not Working
    The trailer running lights use a single dedicated circuit from the connector on your 4Runner so if just the right side running lights aren't working then we know the problem is somewhere on the trailer, and not the tow vehicle. The fact that only the right side on the trailer isn't working actually helps to narrow down the potential cause quite a bit, as the fault could really only be with the tail light itself (which works fine for the brake/turn so we can rule that out) or with the...
    view full answer...
  • Troubleshooting 7-Way on Mercedes ML-350 Where Trailer Lights Dont Work
    If your vehicle is set up to only be able to tow a trailer with incandescent lights. Then you would be able to replace all of the trailers lights with LEDs and it would, in theory, work just fine. Since we have never heard of a vehicle being only set up to tow a trailer with just LED lights I suspect you may have something else going on. Especially since German vehicles typically have the opposite problem where they don't like LED trailer lights. First thing you should do at this...
    view full answer...
  • Troubleshooting LED Lights Not Working On Trailer
    The first thing I recommend doing is to check that the ground wire for the lights are securely attached to a clean metal surface on the trailer frame. A loose ground wire will keep the lights from working. If the ground attached to the trailer does not give you an adequate ground, you can run the wire up to the ground circuit on the trailer connector. Next, you want to make sure the wiring on the trailer is wired correctly and wired by function, not just by color. I recommend using...
    view full answer...
  • LED Marker Lights on Trailer Stopped Working After 5 Years
    Since you have checked the ground connection and tried a different grounding point. I would check to make sure the lights are getting power by using a circuit tester like part # 40376. You will want to inspect the power wires going to the the lights to make sure there is not any frayed or shorted wiring in the system. Then, I would inspect the vehicle and trailer side connector for corrosion. Corrosion in the connector could be causing a bad connection and preventing the lights from...
    view full answer...
  • What is the Gauge of the Wire on the Optronics Tail and Clearance Light Assemblies
    I went to our warehouse to check the size of the wiring on the Optronics # STL9RB & # STL8RB Tail Lights and the # MCL95AB Clearance Lights. The wire on these units measured 12 gauge. When connecting to existing trailer wire, I recommend using the Deka Electrical Butt Connectors, # DW05745-10. This is a set of 10 heat shrink butt connectors that will connect 12-10 gauge wiring.
    view full answer...
  • All Trailer Lights Blink When One Turn Signal Is Activated
    The most likely cause for the incorrect behavior of your trailer lights, where activating one turn signal causes all trailer lights to blink, is an insufficient ground (or a short to ground) on either the vehicle or the trailer. Since you re-wired your trailer you can check for a secure ground connection at the trailer connector. Make sure the white ground wire is firmly secured to a clean bare-metal surface that is free of paint, rust and grease. Next check that the ground wire for the...
    view full answer...
  • Replacement STL8RB Tail Lights for Utility Trailer
    For your utility trailer, I recommend the Optronics Trailer Tail Light # STL8RB for the Passenger Side and # STL9RB for the Driver Side. These are direct replacements for your existing lights and will work perfectly on your trailer. These assemblies are 5-1/16 inches long and 4-9/16 inches wide. I have attached an installation video on these tail lights that you can also take a look at.
    view full answer...
  • Trailer Lights Not Working After Installing New Lights and Wiring
    This sounds like a ground issue. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light but can show up any time. To determine if the issue is in fact a ground problem and not the vehicle side trailer connector you can test the truck side using a circuit tester such as # 40376. I have linked a help article on testing vehicle side connectors for you. Make sure that...
    view full answer...
  • Matched Pair of Optronics LED 7-Function Trailer Tail Lights
    You can use Optronics Trailer Tail Light # STL9RB as the match for the passenger-side light # STL8RB. These high-efficiency LED lights will provide both brighter output and reduced power demand as compared to standard incandescent lights. Both are stud-mount lights that use a 3-wire design.
    view full answer...
  • Trailer Lights Flicker After Installing New LED Lights and Rewiring a Car Hauler Trailer
    You have definitely taken all of the correct steps so far. Since you are still experiencing problems after the rewire and installing new lights, I would suspect a ground problem. Especially since you were careful not to pinch or damage any of the new wires. Rust and corrosion can often show up at ground locations where the wires make contact with the metal. If you used any of the original ground screw holes, I recommend moving them to a clean bare surface on the trailer frame and scrape...
    view full answer...
  • What is the Function of the White Wire on LED Trailer Tail Light # STL8RB
    The white wire on the LED trailer tail light # STL8RB is the ground wire. It will need to attach to a clean and corrosion free bare metal surface. I have included a link to a video review of this light for you. The matching left side tail light is # STL9RB.
    view full answer...
  • Troubleshooting Trailer Brake Lights Not Working When Tail Lights Are On
    It is highly unlikely that the issue is sharing the same LEDs; this sounds like a classic case of a poor ground connection. A bad ground connection can cause issues like this so you'll want to make sure your grounds are securely attached to bare metal surfaces free of any paint, dirt or corrosion of any kind. A ground can also be interrupted if there is anything between the metal trailer frame and the light's ground. I have also added links to a pair of help articles on trailer wiring,...
    view full answer...
  • Is Replacing Trailer Taillights with LED part # STL8RB an Easy Swap
    The trailer taillight style of the part # STL8RB is very common. Probably the most common on the road today. If you wanted to swap out your lights to these that are LED it would be a very simple swap. All you'd need to do is wire up the new assemblies like your old ones and then bolt these in place. For the matching driver side you would want the part # STL9RB.
    view full answer...

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Info for this part was:

Expert Research:
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Mike L
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Patrick B
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Michael H
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Jeff D
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Reno H
Expert Research:
Jameson C
Expert Research:
John H
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Adam R
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Lori W
Expert Research:
Jeffrey L
Updated by:
Adele M
Updated by:
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