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ONE LED Trailer Tail Light - 7 Function - Submersible - Square - Red Lens - Driver Side

ONE LED Trailer Tail Light - 7 Function - Submersible - Square - Red Lens - Driver Side

Item # STL009RB
Our Price: $14.30
Trailer Lights
Orders above $50 qualify for Free Shipping
Shipping Weight: 0.62 lbs
In Stock
STL009RB - Square Optronics Tail Lights
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5-1/16" x 4-9/16". Waterproof trailer light acts as brake, tail, turn, side marker, side reflex reflector, rear reflex reflector, and license plate light. ONE Series provides bright light using fewer diodes than other LEDs. Stud mount. Great Prices for the best trailer lights from Optronics. ONE LED Trailer Tail Light - 7 Function - Submersible - Square - Red Lens - Driver Side part number STL009RB can be ordered online at or call 1-800-496-5010 for expert service.
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Optronics Trailer Lights - STL009RB

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

5-1/16" x 4-9/16". Waterproof trailer light acts as brake, tail, turn, side marker, side reflex reflector, rear reflex reflector, and license plate light. ONE Series provides bright light using fewer diodes than other LEDs. Stud mount.


  • Square trailer tail light serves 7 functions
    • Stop light
    • Tail light
    • Turn signal light
    • Side marker light
    • Side reflex reflector
    • Rear reflex reflector
    • License plate light
  • Sealed, waterproof construction is submersible
  • ONE Series provides bright light using fewer diodes than other LED lights
  • 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 brighter light with less power output
    • No bulbs to replace - no brittle filaments
  • Molded plastic housing
  • Red and clear acrylic lenses
  • Mounts on surface of trailer with included studs
  • 3-Wire pigtail
  • DOT compliant
    • Meets FMVSS 108 and CMVSS 108 requirements for automotive lighting


  • Configuration: driver's side (left-hand side)
  • Dimensions: 5-1/16" long x 4-9/16" tall x 2-7/8" deep
  • Mounting holes: 2" apart on center
  • Power draw at 12.8 volts:
    • Stop light: 0.345 amps
    • Tail light: 0.069 amps
  • Warranty:
    • Lifetime on LEDs
    • 3-Year limited on housing, lens, and wiring

Optronics Light Dimensions

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.

STL009RB Optronics ONE Series Combination LED Boat Trailer Taillight w/ License Plate Illuminator - Left Side - Red Lens

California residents: click here

Customer Satisfaction Score:

Customer Reviews

ONE LED Trailer Tail Light - 7 Function - Submersible - Square - Red Lens - Driver Side - STL009RB

Average Customer Rating:  4.8 out of 5 stars   (668 Customer Reviews)

5-1/16" x 4-9/16". Waterproof trailer light acts as brake, tail, turn, side marker, side reflex reflector, rear reflex reflector, and license plate light. ONE Series provides bright light using fewer diodes than other LEDs. Stud mount.


So, I rewired my trailer to not have any wiring connections underwater during a launch operation. To accomplish this, I placed the "etrailer" tail lights and brackets on existing guideposts, then using two "shielded electrical extension cords" I routed them from the tail lights to the trailer hitch plug-in connector.


Product and service brilliant.
the big things in service have been sorted, eg. good product, value for money (not cheapest) delivered in good condition in a predicted timeframe, it's the little things like an email with tracking url that has ALL the information you need... WITHOUT HAVE TO TYPE IN A TRACKING NUMBER , NAME, ZIP ETC. And same with review, click on a url in an email and enter your comments with pictures .....SIMPLE. so many other companies just make these types of things too complicated and onerous for the customer to provide feedback. Also each person in the process is named! Brilliant, personal and just nice. I wish you guys were responsible for all of my transactions for all the things I buy online. Thank you to all of you at etrailer fantastic job.

I bought lights and Tyres about a year ago, and this is the follow up. All great, I am just as pleased with the products and service as I was when I bought them. And again I have been sent a reminder email to ask my opinion a year later.....brilliant. thank you.
Colin - 07/03/2021


Easy to wire and install. Gives off great lighting.


Easy installation. Have had this installed for just over a year, and it is still in good working order.

Still working well over a year later!
H - 04/06/2022


It worked perfectly for what I wanted.


As usual, prompt service an a reasonable price. What's not to like?


Much better than the trailer's original tail lights which occasionally did not work because of a poor connection inside the light housing. These are brighter with an improved connection to the harness.


Arrived timely and easy to install


No Problems since install 1 year later. Fit and finish good.


Haven't tried them on the road yet, but these seem well made. The edges of the lenses are flush and there isn't even any molding flash. I tested them and holy heck are they bright! Someone would have to be blind to miss the brake lights on these.

The studs are the same spacing as the round incandescent tail light units that used to be pretty popular on utility trailers.

The back of the light has a color code guide (a very nice touch) and notes that the mounting studs are the ground return. Not mentioned is that there's also a white wire (the one with the ring lug) in case you don't want to rely on the chassis ground. Personally I recommend having a continuous ground wire for your trailer lights; chassis grounds can be unreliable, especially in a corrosive environment.


Ordered these for my small trailer and they were a perfect fit and easy to install and wire.The LED makes it even better and longer lasting .


These lightweight LED trailer lights were a replacement for the original lights on my trailer. They mounted easily and work great. They are bright and easy to see from the rear, I should have replaced the old lights sooner. Also, the price was very reasonable, what's not to like about that?


great product easy to install and works well as no more bulbs bouncing loose during travel and works 100% with the wiring... Great videos and online information on how to install this was well worth the money along with the unit is free from moisture being a sealed unit...

Everything is working perfect and thank you for the follow up. I will be buying more when the time comes that I need something you carry and I recommend you to all of my friends and colleagues,
kevina - 07/05/2018


The tail lights that came on our boat trailer were the $1.95 incandescent variety. They quit working after the first season. I replaced them with these sealed LED units which have worked fine ever since.


Drop in replacement for my old lights. 10+ year old trailer and the original lights were coming apart and the sockets were starting to corrode.


Working like a charm after a year dunking my boat trailer in and out of the water.


Great response time shipped the same day as ordered I will definitely use them in the future


Great service and quick delivery after easy online ordering. Between our 5th wheel and a small utility trailer, I'm always in the market for something trailer related.

I will definitely do business with etrailer again.



I backed into tree with trailer and broke driver side light, but I knew just who to contact because a year or so ago my friend backed into his house and broke passager side light. I kept etrailer in my favorites because I had a very good experience the time before. The product is of high quality and at a good price but the thing I liked best was I received 2 different emails thanking me and gave me a number to call if help was needed. Never had that before. Plus this was not a big order but got the same treatment as if it were.


Decent shipping speed and my trailer wiring harness and "one LED" taillights worked perfectly after a quick install. Thank you!


These lights mounted up and wired easy with out any changes to the trailer and are brighter than the original ones.

First time I use LED trailer lights and hope they will be trouble free for many years. Purchased two sets of lights I will change out on my second boat trailer. In the pass I have to change bulbs two or three times a year, I hope this will change.


Excellent quality at an affordable price. Plus shipping was super quick. I have purchased numerous products from these guys. Customer service is second to none. I repeat, customer service is second to none. Thank you etrailer for setting the standard ALL online companies should follow


The one LED submersible trailer lights look exactly the same as my original non-submersible trailer lights but work better and brighter without leaks. The price was awesome but shipping could be a little quicker.


Although the trailer tail light has yet to be installed , I give it 5 stars because of how it is portrayed on the website which encourages the user to install it himself. The vehicle specific videos made the decision to purchase and install the products a slam dunk



TERRY H - 06/07/2016

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