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LED Combination Trailer Tail Light - 7 Function - Submersible - 23 Diodes - Red Lens - Driver Side

LED Combination Trailer Tail Light - 7 Function - Submersible - 23 Diodes - Red Lens - Driver Side

Item # STL57RB
Our Price: $40.96
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Shipping Weight: 0.88 lbs
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6-1/16" x 3-5/8" Rectangle. Waterproof trailer light acts as brake, tail, turn, side marker, side reflex reflector, rear reflex reflector, and license plate light. Mounts on surface of trailer - hardware included. 3-Wire pigtail. Great Prices for the best trailer lights from Optronics. LED Combination Trailer Tail Light - 7 Function - Submersible - 23 Diodes - Red Lens - Driver Side part number STL57RB can be ordered online at or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - STL57RB

  • Tail Lights
  • Rectangle
  • LED Light
  • Red
  • 6L x 3-1/2W Inch
  • Surface Mount
  • License Plate
  • Rear Reflector
  • Side Marker
  • Side Reflector
  • Stop/Turn/Tail
  • Submersible Lights
  • Optronics

6-1/16" x 3-5/8" Rectangle. Waterproof trailer light acts as brake, tail, turn, side marker, side reflex reflector, rear reflex reflector, and license plate light. Mounts on surface of trailer - hardware included. 3-Wire pigtail.


  • Rectangular trailer tail light serves 7 functions
    • Stop light, tail light, turn signal light, side marker light, side reflex reflector, rear reflex reflector, and license plate light
  • Sealed, waterproof construction is submersible
    • Light is designed specifically for boat trailers
  • 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
  • Plastic housing
  • Red and clear acrylic lenses
  • Mounts on surface of trailer
    • Hardware slides along rear channels so that you can adjust the position of the light
    • Stainless steel hardware included
  • 3-Wire pigtail
    • White wire is for ground
    • Brown wire is for the tail lights
    • Yellow wire is for the stop and turn lights
  • DOT compliant


  • Configuration: driver's side (left-hand side)
    • Passenger's-side light (STL56RB) sold separately
  • Dimensions: 6-1/16" long x 3-5/8" tall x 2-1/4" deep
  • Mounting hole dimensions (center to center): 2"
    • Hardware size: 1/4-20 x 1" long
  • Diodes: 23
  • Power draw at 12.8 volts:
    • Stop/turn signal light: 0.268 amps
    • Side marker light: 0.059 amps
  • Quantity: 1
  • Lifetime warranty on LEDs

Optronics STL57 Series LED Combination Tail Light Diagram

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.

STL57RB Optronics Combination LED Boat Trailer Tail Light - Submersible - 23 Diodes - Red Lens - Left Side

Compare to Wesbar 271585-01

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Customer Satisfaction Score:

Customer Reviews

LED Combination Trailer Tail Light - 7 Function - Submersible - 23 Diodes - Red Lens - Driver Side - STL57RB

Average Customer Rating:  4.7 out of 5 stars   (248 Customer Reviews)

6-1/16" x 3-5/8" Rectangle. Waterproof trailer light acts as brake, tail, turn, side marker, side reflex reflector, rear reflex reflector, and license plate light. Mounts on surface of trailer - hardware included. 3-Wire pigtail.


Perfect, light matches exactly. Very satisfied with all my purchases: Hitch, aluminum truck rack, boat trailer lights, wiring harnesses…


It is what I ordered and it fits the trailer well and no problem to install. I also like the amount of light and the brightness.



Great-The lights fit my trailer like the factory lights so I like that as every thing on my 1988 SeaRay boat, motor, and trailer is original except some motor parts replacements with manufacturers parts.

Etrailer Expert

Mike L.


@James We're glad to hear that your # STL57RB trailer taillights are working well for you!


WOOOOOOOWWWWWWW!!!! These lights are BY FAR the brightest I have ever seen! Even with only the tailights on, they are STUNNINGLY INTENSE! Can't go wrong getting them, easy to install, solidly (REAL SOLID) built, look like they are very durable too. Absolutely and totally impressed and well worth the money. Put other LED and incandescent lights to shame!! JUST BUY THEM, YOU WILL BE BLOWN AWAY HAPPY!!


The LED lamp assembly works very well and is water proof. However I put these on my boat trailer about 4 years ago and both sides have a problem that the LED assembly fell out of the housing. There is only 1 little screw holding the LED assembly in the lens. I also lost the housing on one side of the boat trailer. I had to drill holes in the lens and back plate and add tie-wraps to hold the LED assembly in place. This needs to be improved upon.
In the pictures you will notice that I added tie-wraps to the new light.


the light is a great replacement light for any trailer. typical of all trailer break lights the red clear lens is fragile and cracks easy.


I have been more than pleased with the quality and performance of the Optronics brand lights! These are no exception!

This tail light assembly is a direct replacement on my ShoreLander trailer. The running lights, including four on the side, are a nice feature. The brake/signal light are more intense as expected. Lastly, the dimensions and mounting holes allowed me to bolt them into place without issue!

I, like others, am amazed at the brightness of the lights. They are a huge upgrade over my existing incandescent lamps! I am looking forward to no more burnt/broken bulbs!

I have purchased Optronics tailslights in the past, and am purchasing again as I like the quality/performance of the taillight assemblies. I would buy again and I would recommend to others as well!


Replaced the jet ski trailer light perfectly! Lighting is much brighter than the stock incandescent bulb in all modes and light disbursement is very good, even from the sides. The license plate light comes on with the parking lights and is over-kill in lighting up the area below (that is NOT a complaint)!



As per my other review, love these super-bright lights!


Works great and mounts perfectly in place of original incandescent light.


I want to thank you for all your help with my trailer you were more helpful than you realize. So this is my trailer for a 22' Flats Cat shallow draft Catamaran. I totally dismantled my trailer and buffed by hand with a wire buffer and sand blasted in some spots and applied multiple coats of some very expensive galvanize paint (Z.R.C.). I installed all new C. E. Smith Carpet (about 80'), seven new LED waterproof lights, new springs, new equalizers, new tongue jack, new wench, new safety chain, new chain brackets, all new SS hardware and a 35' long wiring harness.
I was able to send only one review with a picture of the safety chain and brackets. I'm having a little trouble with the rest..oh some of these items were bought locally or from your competitors, until I found ETRAILER. Your prices were cheaper for the exact same things. Your helpful how to videos were helpful. And Rose, your personal helpful knowledge made my buying experience very pleasant, I actually enjoyed talking to you! Thanks to ETRAILER and specifically to Rose G.


I ordered this lamp because I am thinking LEDs will not be affected by the submerged in water. I had incandescent lamps that burst when submerged because the housing was not watertight


Quality LED lights. Easy to install and one year later they are still working well.


Lights worked perfect for my trailer as I did a lot of research and this was the only place that had trailer lights that would work with this trailer.

Dale S.


Still working great. No problems at all. Nice to back into the lake and not worry the lights are burnt out..


Identical replacement of broken tail light. Excellent delivery time. Ordered 4/25/23 after 7:00pm and received 4/29/23 after 11:00am, using standard delivery. Already installed and ready to travel. Thanks e-trailer.


Just installed new lights. I think these are a nice, very bright LED light but they shipped without any mounting hardware. I would excpect that for the price it would of come with the licence plate holder and at the very least mounting screws and nuts. It added an extra hour and several more bucks to this project to hunt them down at the Home Depot. I will see in time how the lights hold up in salt water


Exactly what describe, super fast shipping. Worked well on my shorlandr boat trailer.
Only 4 stars because I haven't submerged the lights yet!


Timely delivery after order, and the lights work just great! Perfect fit and great brightness & visibility.


THe shipping took alot longer then what was said when ordered


Very quick and easy Installation.
would recommend this product to anyone


just what I wanted, fits my 2007 Karavan boat trailer and I love the upgrade to LED. thanks


I ordered these LED Trailer tail lights (STL57RB and STL56RB) for my 1988 Shorelander trailer. I was having a hard time matching the dimensions of my worn out lights. These new lights fit perfectly. They were easy to install, but if you have questions the web site has resources including videos that can assist you. LED is the way to go. These lights are much brighter than the old incandescent model.

Dave D.


The trailer lights are working great. Im very satisfied with the product and your company


Great service and informative


Bought these to retrofit my 2004 Shoreland'r boat trailer. etrailer's price was very competitive, they shipped exactly when they promised and the lights arrived quickly thereafter. The website description was accurate and provided exact dimensions so lights fit just as expected. Installation was fast and easy with the fasteners provided. I had heard rumors about LEDs not working properly with some 2004 GM electrical systems but there was no problem with these. Very satisfied with the product and the supplier.



Theyre still functioning properly after numerous submersions and many milesof road vibration. So far, so good: Would recommend to others.


After I kicked the light one day at the launch ramp, breaking the lens, I was delighted to find that i could just order the necessary lens - which came with new electronics at a decent price from etrailer. Now a year later, it is all working well - whenever we manage to get to the water - and it has maintained it's waterproof status after many dunks in the salt chuck. Good product and fine service.

Craig J.


Lights continue to work well. I have adopted the policy of unplugging the light before dunking it underwater. Of course, I also had to train myself to plug it back in before getting on the road - thats what a check list is for, I imagine.


This trailer tail light is a perfect fit. This is the best upgrade I have done to my boat trailer. They are very bright, both parking and brake. I am very happy with this product. Shipping was very fast and I will be back to upgrade the rest of my trailer lights. Job well done!

Tim H.


Very happy after a year. Great products. Very bright and submersible, what more do you need?Highly recommended, you wont be sorry!Nice not to have a big draw from trailer lights on your electrical system.I cant say enough about them.


Product is excellent and easy to install

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • Trailer Taillight Recommendation for Replacing Light Part Number J-70
    I looked up pictures of trailer lights that are marked part number J-70 and the most similar light we carry to them is the LED part # STL57RB which measures 6-1/16" x 3-5/8". I attached a review video for this for you to check out as well.
    view full answer...
  • Smaller Trailer Stop/Turn/Tail Light Recommendation for Small Trailer
    In order for a light to safely cover all of the functions you mentioned the smallest option we are going to have is the LED Trailer Light part # STL57RB that you mentioned which measures 6-1/16" long x 3-5/8" tall x 2-1/4" deep.
    view full answer...
  • Upgrading Small Utility Trailer Incandescent Lights To LED Trailer Lights
    I think you will be very happy with an upgrade in your lights to the LED Trailer Tail Light - 6 Function - Submersible - 18 Diodes - Rectangle - Red Lens - Passenger, # STL56RB and the # STL57RB for the driver side. You can ground the lights independently to your trailer. Many wiring harnesses have the brown and yellow combination like you mentioned and it is most likely the case that you can connect the brown to brown and yellow to green as you mentioned, however I can't say that it...
    view full answer...
  • Is There a Right Hand Version of the Rectangle LED Trailer Tail and License Plate Light # STL57RB
    Yes, the right hand version of the Tall Rectangle Submersible LED Trailer Tail and License Plate Light # STL57RB that you referenced is the part # STL56RB.
    view full answer...
  • Replacement LED Tail Light For Trailer With 2-Inch Center-To-Center Mounting Holes
    The tail light we offer that comes the closest to the dimensions you referenced is the Optronics part # STL56RB. This is a submersible, 18-diode tail light. The measurements for this light are 6-1/16 inches long x 3-5/8 inches wide x 2-1/4 inches deep. This light offers 6 functions, Stop, Turn, Tail, Rear Reflex, Side Marker, and Side Reflex. The # STL56RB is designed for the passenger side of the trailer. For the driver side you need part # STL57RB. This light has 23 LED diodes and...
    view full answer...
  • How Many Lights Are Included In Rectanglular Submersible LED Trailer Tail Light # STL56RB Package
    The # STL56RB is sold individually and is designed for the right side(passenger side) of the trailer. For the left side(driver side) you would want part # STL57RB. This has the same 6 functions as the right hand but also has the license plate light included. It is also sold with one in the package.
    view full answer...
  • Can Passenger Side Optronics Light Be Used on Both Sides of Trailer
    If you don't have a need for a license plate on your boat trailer then there's no reason you can't use the Optronics LED Trailer Light - Passenger Side # STL56RB (which doesn't include the license plate light) on both sides of the trailer. The license plate light is the only difference between the two assemblies. The "Over 80/Under 80" designations you see on some lights have to do with the trailer's width. A trailer that is wider than 80 inches requires additional side markers and clearance...
    view full answer...
  • Why Isnt There a Replacement Lens for the Optronics Taillight STL57RB
    I spoke with my contact at Optronics and they do not sell replacement lenses for these lights. These lights are submersible so they are sealed from the factory. There is no way to replace the lens and re-seal it. You will need to replace the Optronics Trailer Light # STL56RB, if you also need the left hand side you will need a Optronics Trailer Light # STL57RB.
    view full answer...
  • Will Optronics Submersible LED Trailer Tail Light # STL56RB Fit a 1987 Shorelander Trailer
    Yes, the Optronics Tall Rectangle Submersible LED Trailer Tail Light, part # STL56RB, will work on your 1987 Shorelander trailer. We have gotten back many reviews of these lights working just fine on Shorelander trailers. I will give you the dimensions of the lights so you can make sure they will fit your trailer. The light is 6-1/16 inches long x 3-5/8 inches wide x 2-1/4 inches deep. They have two slots on the back of the light, 2 inches apart, for mounting on the trailer. The light...
    view full answer...
  • Matching Passenger Side for Optronics LED Trailer Light # STL56RB
    Sounds like you are looking for the matching passenger side to match the # STL57RB that you referenced. For that you'd need the part # STL56RB and you'd be set. I attached an install video for these for you to check out as well.
    view full answer...
  • Matching Left Side Trailer Tail Light to Go with LED Light # STL56RB
    LED Trailer Tail Light # STL56RB is for the right hand side of the trailer. The left side is # STL57RB. You couldn't mount these lights upside down because they hang from bolt heads and could fall off.
    view full answer...
  • Driver Side Trailer Taillight to Match STL56RB
    Along with the passenger-side LED trailer light # STL56RB you can use the mating driver-side light # STL57RB. This is identical except that it also includes the license plate light function. Both of these submersible lights share the higher-efficiency and brighter output of LEDs as opposed to standard incandescent bulb lights that waste power, generate more heat and require replacement.
    view full answer...
  • Availability Of Replacement Light To Replace LED Tail Light STL57RB With Missing Lens
    I have a complete replacement light for you, but the red cover on the LED Combination Trailer Tail Light # STL57RB you have is not available by itself. Instead you will need to replace the entire light with the # STL57RB for the driver side, and the # STL56RB if you need the passenger side as well. I included videos of the products mentioned for you to take a look at.
    view full answer...
  • Are The Lenses of the Optronics Light # STL56RB Replaceable
    I spoke with my contact at Optronics and they do not sell replacement lenses for these lights. These lights are submersible so they are sealed from the factory. There is no way to replace the lens and re-seal it. You will need to replace the Optronics Trailer Light # STL56RB, if you need the left hand side you will need a Optronics Trailer Light # STL57RB.
    view full answer...
  • Recommended Submersible Trailer Light For Karavan Boat Trailer
    We don't have a light that is 6 x 2-1/4 x 3-1/2 inches, but we do have lights that are 6 1/16 wide x 3-5/8 tall x 2-1/4 deep if the measurements were just given in a different order. Unfortunately trailer lighting companies change their lights from time to time and the dimensions often change with a newer design. I recommend you take this opportunity to upgrade your lights on your karavan boat trailer. I recommend you use the LED Trailer Tail Light - 7 Function - Submersible - 23 Diodes...
    view full answer...
  • Replacement 6" wide x 3-1/2" Tall Tail Lights For Boat Trailer
    I'll start out by saying that you don't necessarily have to use the same sized lights, but it's occasionally helpful when it comes to mounting them. However, if you're not replacing like for like, the odds that your new lights will have the exact mounting pattern or method is unlikely. I'll also add that if your other trailer lights are incandescent, this isn't really a recommended setup. The problem is the amount of power required by each type. LEDs require much less power incandescent...
    view full answer...
    Image 1 for
  • Replacement Stop/Turn/Tail Light Option for a Karavan Boat Trailer
    I do have a recommendation for you but at this time we don't have the exact replacement lights for your Karavan trailer. We do have the submersible driver side # STL57RB and passenger side # STL56RB lights from Optronics though that measure 6-1/16" long x 3-5/8" tall x 2-1/4" deep. These feature LED lights, a light for your license plate, and carry the stop/turn/tail light functions. I have attached some photos with dimensions as well as review videos for you to check out.
    view full answer...
    Image 1 for
  • Replacement Tail Lights For Karavan 6' x 12' Single Axle Trailer
    For trailer tail lights you need to measure the overall width of your Karavan 6'x12' single axle trailer. So you will need to measure to the widest part of the fenders which appears it will be roughly 96" wide. Based on images I could find it appears your trailer uses the LED Trailer Tail Light Driver # STL57RB and Passenger # STL56RB sides.
    view full answer...
  • LED Lighting Options for a Honda Trailer With Incandescent Surface Mount Lights
    I checked all of the lights that we have available at this time and there are two lights that may work for you. The Tall Rectangle Submersible LED Trailer Tail Light, 6-Function, 3 Wire, 18 Diode, Right Hand, item # STL56RB, or the 7 inch Round Transit LED Stop and Tail Light, 31 Diode - Red, item # STL90RB, are the only surface mount LED lights that we carry that might work for your application. They are quite a bit larger than the existing lights you have on the trailer now. If the...
    view full answer...
  • Replacing Damaged Rectangular Tail Lights on Sea Ray Boat Trailer
    We can help you find replacement submersible tail lights for your boat trailer! You can use the link provided to see our main page for submersible rectangular trailer tail lights and using the filters in the left-hand margin you can narrow the results based on the characteristics and exact dimensions of your original lights. For example, Optronics Trailer Light # STL56RB measures 6-1/16 L x 3-5/8 W x 2-1/4 D and uses 18 high-efficiency LEDs and a 3-wire electrical connection. The matching...
    view full answer...
  • Replacement Red LED Tail Lights for Trailer
    We do have very similar LED options available, however there is not a direct LED replacement available for the Wesbar Submersible Tail Light # 403075 and # 403025. I recommend looking at the Optronics LED Trailer Tail Light # STL56RB for the Passenger Side and # STL57RB for the Driver Side. These have similar dimensions to the Wesbar Tail Lights mentioned in your question at 6-1/16 inches long, 3-5/8 inches tall and 2-1/4 inches deep. They have mounting hole dimensions of 2 inches center...
    view full answer...
  • Recommended Replacement Tail Light for Boat Trailer
    The Optronics ONE Series Marine LED # STL0016RB you asked about is 8 x 2-7/8 by 2-13/16 inches. I've attached a diagram to assist. The closest tail lights to your 3-3/8x5-7/8 measurements on your boat trailer are the STL57RB for the driver's side and STL56RB for the passenger side. These LED submersible lights are 6-1/16 x 3-5/8 so just slightly larger. For incandescent lights, I recommend the Optronics 6-Function Tail Light - Submersible - Passenger Side # ST56RS and driver's side...
    view full answer...
    Image 1 for Image 2 for
  • Recommendations For Improving Lighting on The Rear of a Travel Trailer
    My best recommendation would be to upgrade from the more basic halogen lights that come on most travel trailers to a LED Taillight. The LED Combination Trailer Tail Light # STL57RB and # STL56RB will offer you a much brighter light. They are also submersible so you don't have to worry about water getting inside and fogging the lens. You can also look at replacing all your marker lights with brighter LED lights as well. The Optronics LED Trailer Clearance and Side Marker Light # MCL49RB...
    view full answer...
  • Is Optronics LED Trailer Tail Light # STL57RB a Single Light or a Pair
    Optronics trailer tail light # STL57RB, is a single light. This is the left hand side light and it has a built-in license plate light on the bottom. The right hand side light is # STL56RB. For a complete kit, you can use # TLL56RK. It includes both left and right side lights, a license plate bracket, a wiring harness, and installation hardware.
    view full answer...

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