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Combination LED Trailer Tail Light - Submersible - 7 Function - 14 Diodes - Driver Side

Combination LED Trailer Tail Light - Submersible - 7 Function - 14 Diodes - Driver Side

Item # STL9RB
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Optronics Trailer Lights - STL9RB
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5-1/16" x 4-9/16" Square. Waterproof trailer light serves 7 functions: stop, turn, tail, rear reflex, side marker, side reflex, and license plate light. 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 - 7 Function - 14 Diodes - Driver Side part number STL9RB can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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Optronics Trailer Lights - STL9RB

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

5-1/16" x 4-9/16" Square. Waterproof trailer light serves 7 functions: stop, turn, tail, rear reflex, side marker, side reflex, and license plate light. Durable plastic housing. Stud mount on 2" centers. 3-Wire design.


Features:

  • Square trailer light serves 7 functions
    • Stop light, turn signal light, tail light, rear reflex reflector, side marker light, side reflex reflector, license plate light
  • 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: driver's side
    • Passenger's side: STL8RB (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.



STL9RB Optronics Combination LED Taillight with License Plate Illuminator for Trailers Under 80" - Red lens - 14 Diodes

Alternate part number: STL-9RB




California residents: click here



Customer Reviews

Combination LED Trailer Tail Light - Submersible - 7 Function - 14 Diodes - Driver Side - STL9RB

Average Customer Rating:  4.9 out of 5 stars   (344 Customer Reviews)

5-1/16" x 4-9/16" Square. Waterproof trailer light serves 7 functions: stop, turn, tail, rear reflex, side marker, side reflex, and license plate light. Durable plastic housing. Stud mount on 2" centers. 3-Wire design.

- STL9RB
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!


Comments
Lights still work perfectly after heavy snows during 2020 2021 winter outdoor storage.
David V - 04/21/2021


- STL9RB
by:

Perfect replacement for factory installed lights. Was able to use factory drilled mounting holes. Installed in less than 45 minutes. Much brighter than original lights. I believe that they should provide many years of trouble free use.


Comments
Its been about a year, the lights have gone through all four seasons here in Minnesota and continue to function flawlessly. They have been a great investment saving me the time and effort needed to replace light bulbs.
Don - 06/21/2018



- STL9RB
by:

Looks Great! Works Great! These were added to a 14' Kaufman Dump Trailer that I wanted to use as a utility trailer also, but when completely tarped, the brake/tail/turn lights were covered. So, I added these lights to the side of the frame so that they could be seen when the trailer was securely tarped.


Comments
I still love the products purchased
Winsel S - 12/31/2016



- STL9RB
by:

Awesome! Easy to install and look good.



- STL9RB
by:

STL9RB & STL8RB Trailer tail-lights. Removed old standard bulb tail-lights, from my small "runaway" camper trailer, and replaced them with these LED tail-lights. The LED lights are much brighter than the old lights. Installation was easy. Followed the instruction video. It took me about twenty minutes from start to finish. They work great and look great.


Comments
Still working great.
Bruce - 02/22/2019



- STL9RB
by:

Had to replace the tail light on my motorcycle trailer that vibrated and broke on my last trip (different manufacturer). Just completed a 500 mile trip, including periods of rain. No problems at all. Grat product.



- STL9RB
by:

Great Lights.



- STL9RB
by:

Purchased a year ago the combination LED Trailer Tail Light - Submersible - 6 Function. They are still working flawlessly. They are 1000% better than what came on my boat trailer.



- STL9RB
by:

LEDs are going strong after a year of hard use. Much better than fighting with incandescent bulbs.



- STL9RB
by:



- STL9RB
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- STL9RB
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- STL9RB
by:

Appears to be of excellent quality and fit. Easy replacement of old bulb type lights. Everyone should retro their lights to LED's. Big safety improvement. Don't have a report on how submersible/water tight these lights will be yet.


Comments
Nothing to add, but.... awesome. they are bright and work fine on the boat trailer, even after several dunkings in the lake.
JW - 07/16/2014


- STL9RB
by:

I bought a 1980 motorboat that still had (I think) the 1980 trailer lights. These new LED lights are easy to install, bright, etc. The electrical leads are about 6" long, a little longer would be nice, depending on where the connection to the existing wiring needs to be. It is grounded via a third wire, rather than the mounting studs themselves. So... one extra wire. All in all, it does exactly what you would expect.



- STL9RB
by:

Very impressed! Ordered the STL9RB and the other side twin STL8RB. Etrailer shipped the wrong twin. One phone call and 5 minutes later, the correct part was shipped! The LED tail lights and side markers (MCL82ADB Optronics LED Surface Mount Marker/Clearance Lights with Reflex) are for a home-built cargo trailer. Decent build, waterproof, and the plastic is of a heavy gauge to last a long time in the Arizona sun. These units are equipped with LED's, and should last a long time. Thanks etrailer!


Comments
One year in, and tail lights are still holding up well in the Arizona sun . . . . . :-
Robert B - 04/10/2019



- STL9RB
by:



- STL9RB
by:

I purchased these lights to replace the factory lighting on my 10x6 utility trailer. The driver's side factory light had quit working and I decided I would like some better lighting. I installed them on my atv trailer which doesn't get used often but I will say these lights were easy to install and much brighter than my factory lights. I highly recommend them and enjoy shopping on etrailer.



- STL9RB
by:

Very nice lights for the price. They were easy to install and the mounting bolts fit right into my existing holes from my "different brand" lights that were damaged. They are very bright! Not sure if they are "truly" submersible like the add says, as the wires simply go through a manufactured hole in the back of the case, so the wiring inside must be sealed. Either way, I just filled this hole with some regular silicone caulk. As with all trailer lights I would recommend buying or making light guards, as these lights can break easily. Overall I am happy and would definitely recommend!


Comments
Thank you! The lights are great, no issues at all, and tough as nails!!! I have them on a 10k 6x10 dump trailer, that I beat the snot out of, gravel logging roads, mud, snow, ice, driving through brush. I just wish my trailer tires were as tough as those lights. Thanks again, and if I ever need anything for my trailers, I will be shopping etrailer!!!
John R - 11/06/2018



- STL9RB
by:



- STL9RB
by:

I wanted submersible tail lights with the large hole on the bottom so the water would quickly drain out which was shown on your website. The lights arrived with the large hole on the top of the light with just a pinhole on the bottom which could quickly be clogged by debris allowing the light to freeze and break. After much discussion back and forth and sending pictures proving it was not as shown on your website, I finally got the charge removed from my credit card. In your defense I suspect that the manufacturer revised the product and did not advise you, or the manufacturer mislabeled the product. But I was surprised that I was charged for the return shipping. Lesson learned.



- STL9RB
by:



- STL9RB
by:

Awesome idea! I've used them for the last several years but, unfortunately, I broke the lens when I hit something. My old ones didn't have replacement lenses, my new one do. If I break them again, it will be a lot cheaper and easier just to replace the lens instead of the whole tailight.


Comments
LED Submersible Trailer Stop, Turn, Tail and License Plate Light. The LH and RH taillights that Ive been using for a year now still work perfectly theyve been submerged hundreds of times! Theyre several times brighter than my old LED lights-a real safety factor! The only thing Id like to see would be a non-license-plate version of the LH unit for states like MN that dont issue trailer license plates. I had to tape over the illuminating lights on that side. A truly great product!
Ned P - 04/16/2014


- STL9RB
by:

Installed this and several other lights on a new trailer. Factory lighting and wiring left a lot to be desired, and with the help of etrailer.com I was able to get everything fixed up like I wanted. Lights work very well - clear and bright red tail and turn/brake lights.


Comments
All of the products I purchased its been about 2 years now are still working great. Thanks for checking in.
Jim - 12/10/2018



- STL9RB
by:

Product was as described. It was delivered in a reasonable amount of time and did what it was supposed to do.


Comments
The LED taillight is the only way to go. No burned out bulbs or unplugging the trailer lights before submerging the trailer in the water. Yes, Im pleased with the product and everything I have purchased from etrailer over the last several years.
Richard - 07/01/2020


- STL9RB
by:

Has held up and worked well for a year, only about half dozen launchs and I have always remembered to unplug the trailer before backing into the water so far. The real test as we all know will be when I forget to unplug the trailer before backing into the water.


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Show More Reviews

Ask the Experts about this Optronics Trailer Lights

  • Replacement LED Drivers Side Tail Light for Boat Trailer
    While we definitely have 3-wire LED driver's side tail lights for your trailer, there are none I could find that fit your exact description. The best way to find a replacement light is to measure your current tail lights and find the one that most closely matches your measurement, and also know if your lights are surface mounted or recessed mounted. For example, the Combination LED Trailer Tail Light - Driver Side # STL9RB is 5-1/16" wide x 4-9/16" tall x 2-5/8" deep and is a surface...
    view full answer...
    Image 1 for Image 2 for Image 3 for
  • Lights on 1999 Magic Trail Trailer By Magic Tilt Do Not Work
    SAE is correct, it stands for Society of Automotive Engineers. The SAE followed by numbers and letters is a lens rating. LED lights are usually sealed or the LED module itself will be sealed. They can burn out but it would either take a long time or an event such as a bad short to cause them to burn out. You might actually have 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...
    view full answer...
  • Are Parts # STL9RB and # STL8RB the Same but Opposite Tail Lights
    Yes these are the right and left hand side lights. Because of the side marker light on the side of the lamp, Part # STL8RB should only be used for the right hand tail light. The left LED taillight would be part # STL9RB. For install details and some product demonstration videos, click the provided links.
    view full answer...
  • Replacement 5 inch Trailer Light
    Some of our most popular 5 inch x 5 inch trailer tail lights come from Optronics and can be found with part # STL9RB for the Driver Side or part # STL28RB for the Passenger Side. These are submersible 18 Diode LED Square Lights. If these are not the correct style or fit I have also attached a link to our selection of trailer lights for you to filter through.
    view full answer...
  • Troubleshooting Left Side Running Light Problem on a Boat Trailer after Installing a New Tail Light
    It sounds as if you either have a weak ground at the first light on the left side of the trailer that is not working or you have a broken or pinched wire on the left side after the light that is working. You have effectively eliminated the vehicle and trailer connectors by observing the fact that the first running light inline on the left side of the trailer is functioning properly and that all of the other trailer lighting is working. Start, by making sure the lights that are not working...
    view full answer...
  • Troubleshooting Trailer Lights not Working with 2009 Honda Pilot
    This is an issue we run in to quite commonly when installing Combination LED Trailer Tail Light part # STL9RB or any other trailer light. The good news it has nothing to do with the vehicle 99% of the time. The most common cause for this is bad grounding at your lights or at the wiring harness ground. When this came into the shop my first step would be to remove sand down to good steel and replace each ground. That will likely solve your issue. The very dim light coming through is an...
    view full answer...
  • Passenger Side Match for Trailer Tail Light # STL9RB
    The counterpart to the Trailer Tail Light 7-Function # STL9RB is the Trailer Tail Light 6 Function # STL8RB. The function that passenger light does not have that the drivers side does have is the License Plate function. The power from the drivers side light handles that function.
    view full answer...
  • Can Trailer Tail Lights Be Mounted Upside Down So License Plate Can Be Above Lights
    The Optronics LED Trailer Tail Light # STL9RB can be mounted however you would like. So there's nothing that will prevent the light from working. However, I would suggest checking with the DOT in your area to make sure that there aren't any laws against it.
    view full answer...
  • Does Optronics Trailer Tail Light STL-9RB have an IP67 Rating
    A submersible light such as # STL9RB is sealed and waterproof. This light is not given an IP rating but if to get an IP rating of 67 something must meet NEMA code 6 then these lights would do the trick. For a set you can use # TLL28RK.
    view full answer...
  • Passenger Side Running Lights On Boat Trailer Have No Power But Stop/Turn Lights Work
    Running light signals on a trailer are carried by a different wire than the one that carries stop and turn signals. On a 4-pole flat wiring harness like Optronics # A35W42B the brown wires carry running light signals and the yellow and green wires carry left- and right-turn signals and brake lights, respectively. The linked article on trailer wiring shows this and other connector types and the function typically carried on each wire. Checking your individual lights' grounds is a good...
    view full answer...
  • Troubleshooting Bad Lighting Ground on 30-Foot Hillsboro Gooseneck Trailer
    If a trailer's main ground connection is not strong enough to allow all lights to operate sometimes adding an additional ground jumper right at a specific light, as you did, will remedy the problem but it can also cause it to move to a new light, the light that now has the worst ground connection. This ground jumper is usually the fix for lights that use their mounting studs for ground and on trailers that may have corrosion, grease or lots of paint at the main grounding point on the...
    view full answer...
  • What are the Wiring Colors and Functions for the Optronics LED Trailer Tail Light # STL9RB
    On the LED tail light # STL9RB, the yellow wire is for turn/brake lights, the brown wire is for running lights, and the white wire is the ground. The license plate light will illuminate with the running lights. The matching right hand side is # STL8RB.
    view full answer...
  • What is the Difference Between Trailer Lights # STL9RB and # TLL9RK
    The difference between the LED Left Hand Trailer Light, # STL9RB, and the Trailer Light Kit, # TLL9RK, is the fact that one is an individual light and the other is the light set with license plate bracket. Part # STL9RB is the left hand stud mounted LED tail light. Part # TLL9RK is a packaged kit which includes 2 LED stud-mount tail lights, # STL8RB and # STL9RB, and a corrosion proof license plate bracket.
    view full answer...
  • Troubleshooting Right Tail Light Does Not Turn On but the Right Stop, Brake and Turn Signals Work
    It sounds like you have a weak ground on your right light. Start by making sure that your right light is securely grounded to a clean part of the trailer frame where there is no rust, corrosion and paint. Also check the main vehicle wiring grounds to make sure they are attached to a clean surface. Then check the brown wire with a circuit tester # 40376 to make sure power is running through it. The brown wire runs power to the taillights, so if no power is going through this wire when the...
    view full answer...
  • What are the Functions of the Wires of a Trailer Taillight that Has Red, White and Black Wires
    For trailer taillights that have the three wire colors you mentioned the white wire is the ground, the black is the taillight and the red is the turn signal/brake light.
    view full answer...
  • What Is Wire Size For Parts And Recommended Connectors
    I called the manufacturers to confirm wire sizes. The Optronics lights, Item # STL9RB and Item # MCL76AB, will have 20-18 gauge wires. The Electric Trailer Brake Kit, Item # AKEBRK-35, will have 12-10 gauge wires. I recommend using the Deka Heat Shrink Butt Connectors. For the 20-18 gauge wires this will be Item # DW05743-10 and for the 12-10 gauge wires it will be Item # DW05745-10. If you need additional wire for your project, Item # 10-1-1 and Item # 10-2-1 are available. I...
    view full answer...
  • Left Handed, Submersible Trailer Light and License Plate Bracket Recommendation
    What you will need is a Over 80 inch Wide, Square Submersible Trailer Tail Light with License Plate Light, 8-Function, Left, part # ST5RB. For a license plate bracket you will need a Trailer License Plate Mount Bracket, Angled, Rust Proof Polymer - Black, part # LP10SB. If you need a right handed light, you would want a Over 80 inch Wide, Square Submersible Trailer Tail Light, 7-Function, Right Hand, part # ST4RB. The reason I recommend a different Tail Light from the one you referenced...
    view full answer...
  • Zinc License Plate Bracket for Optronics LED Trailer Tail Light # STL9RB
    For a zinc plated license plate bracket that will work perfectly with the Optronics LED Trailer Tail Light # STL9RB you will just need the part # LP15SB. This bracket features mounting holes that are spaced apart by 2 inches, matching the studs on the Optronics Tail Light. I have attached a couple short video reviews that you can check out as well.
    view full answer...
  • Troubleshooting Trailer Wiring that Stops Working When Headlights Are On
    Try improving the connection of the main ground wire of the trailer wiring harness. Make sure it is attached to a clean metal surface. Or you can run all of the trailer wires back to the main ground. This is actually the ideal solution. But you can also check the current grounds for the lights to make sure they are making a solid connection to a clean metal surface. What you described is the classic insufficient ground scenario so finding a way to improve the grounds will fix the problem.
    view full answer...
  • Right Hand Tail Light Goes Out When Vehicles Headlights Are On
    I am assuming that you mean the right hand trailer tail light goes out when you turn the headlights on in the vehicle. If that is the case then this sounds like a ground issue. In order to remedy this you are going to need to reground each tail light assembly and both the vehicle side and trailer side trailer connectors. The tail light assemblies will ground via a single wire or the mounting hardware. If they ground with a single wire then you will want to remove the wire, sand down the...
    view full answer...
  • Why is the Left Hand Light More Expensive than the Right Hand Light?
    The left hand taillight is more expensive because it contains more LED lights than the right side, due to the addition of the license plate light on the bottom of the light. The white LED is more expensive to produce also and that adds to the cost of the left hand light because the license plate lamps are white.
    view full answer...
  • Left Side Boat Trailer Tail Light Does Not Have Power when Bulb is Installed
    The most likely problem is going to be a bad ground. Without the bulb in, there is no draw on that light and ground issues normally show up when there is a load on the system. If you recently install a plastic license plate holder in between the light housing and the trailer frame, that can cause this problem (if the lights ground through the mounting studs). The solution will be to run jumper grounds (no matter how the lights ground to the frame) to the main trailer connector ground....
    view full answer...
  • Replacement LED Light Installation on Trailer Cargo Platform
    If you intend to wire your new additional lights into the existing lighting circuits on your trailer then I do recommend using LEDs since they will add a minimal additional power draw on that wiring. Since you probably have no way to know for sure about the power-handling capacity of that internal trailer wiring using high-efficiency LEDs lights is the safer way to go. It is okay to mix incandescent and LED lights but note that they typically have different brightness levels; LEDs usually...
    view full answer...
  • Recommendation For Matching Driver And Passenger LED Trailer Tail Lights
    The driver side tail light that matches Item # STL8RB is Item # STL9RB. This trailer light is the same as # STL8RB but has additional functions related to the driver's side. It has the added function of license plate light. Additional information and videos attached.
    view full answer...
  • Passenger Side Trailer Taillight Recommendation to Match Driver Side Taillight # STL9RB
    The passenger side trailer taillight to match the part # STL9RB is the part # STL8RB.
    view full answer...
  • Recommended Taillight for Redline LG440NP Guard for Trailer Taillights
    The Redline # LG440NP steel trailer lamp box works well with the Peterson # 432400 driver's side and # 432200 passenger side incandescent taillights, but I'd recommend going with LED taillights because they draw less power, are brighter and last a heckuva lot longer. If you want to go that route, use # STL9RB for the driver's side and # STL8RB for the passenger side. Per the product description, you'll need to cut a slot in the underside of the lamp box on the driver's side so the license...
    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...
    Image 1 for
  • What are the Measurements of Optronics Replacement Side Marker Lens # AL9RB
    I went out to the warehouse and pulled the Optronics Replacement Side Marker Lens # AL9RB. It measures 2-13/16 inches across, 2-1/8 inches tall, and it is 3/16 of an inch thick. The mounting holes are 2-5/16 inches apart on center. The lens is for # STL8RB and # STL9RB lights which no longer use a gasket. The LED light system is encased (sealed) in plastic making the LED light fixture itself waterproof.
    view full answer...
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