LED Tail Light with Grommet and PL-3 Plug - Stop, Tail, Turn - Submersible - 12 Diodes - Red Lens

LED Tail Light with Grommet and PL-3 Plug - Stop, Tail, Turn - Submersible - 12 Diodes - Red Lens

Item # STL34RB

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Optronics Tail Lights - STL34RB
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5-1/4" x 3-1/2". Waterproof trailer light serves 3 functions: brake, tail, and turn signal light. Durable polycarbonate housing and lens. Recessed mount with included black PVC grommet. 3-prong plug with 10" pigtail included. Lowest Prices for the best trailer lights from Optronics. LED Tail Light with Grommet and PL-3 Plug - Stop, Tail, Turn - Submersible - 12 Diodes - Red Lens part number STL34RB can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (15)
  • Q & A (8)
  • Videos (1)
  • Photos
  • Why etrailer?

Optronics Trailer Lights - STL34RB

  • Tail Lights
  • Rectangle
  • LED Light
  • Red
  • Recessed Mount
  • 5L x 3-1/2W Inch
  • Submersible Lights
  • Optronics
  • Stop/Turn/Tail

5-1/4" x 3-1/2". Waterproof trailer light serves 3 functions: brake, tail, and turn signal light. Durable polycarbonate housing and lens. Recessed mount with included black PVC grommet. 3-prong plug with 10" pigtail included.


  • Rectangular trailer tail light serves 3 functions
    • Stop light
    • Tail light
    • Turn signal light
  • Sonically sealed, waterproof housing and lens unit is submersible
  • 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
  • Polycarbonate lens and housing
  • Red lens
  • Recessed mount with included black PVC grommet
  • Molded 3-prong plug with 10" long pigtail included
  • DOT compliant
    • Meets FMVSS 108 and CMVSS 108 requirements for automotive lighting


  • Dimensions: 5-1/4" long x 3-1/2" tall x 1-1/2" deep
  • Diodes: 12
  • Power draw at 12.8 volts:
    • Stop/turn signal light: 0.405 amps
    • Tail light: 0.038 amps
  • Quantity: 1
  • Lifetime LED warranty

Optronics STL34 Series LED Tail Light Diagram

Manufacturer Cross Reference
Light will work as an exact replacement for:
Uni Bond # LED4060-60R
Truck Lite # 45052R

Sonically 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 housing and lens are sonically sealed together to create a single unit, which means that water will not get into the light and damage the diodes or circuit board.

Recessed-Mount Light

Recessed mount light

Recessed-mount trailer lights install underneath a housing or a grommet. These lights will extend into the mounting surface and require that a hole be cut into your trailer.

STL34RB Optronics Combination Trailer Taillight with Grommet and Pigtail - 12 Diodes - Red Lens

Alternate part number: STL-34RB

Video of LED Tail Light with Grommet and PL-3 Plug - Stop, Tail, Turn - Submersible - 12 Diodes - Red Lens

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Optronics Trailer Lights - Tail Lights - STL34RB Review

Today, we're going to review part number STL34RB. This is Optronics Sealed, LED Flush Mount Rectangle Trailer Stop, Turn, and Tail Light with the Rubber Grommet and 3-Prong Plug. This red rectangular light will serve three functions, stop, turn and tail light function. It is sonically sealed. It has a waterproof housing and lens unit, all one piece. It is corrosion resistant. You have the 12 LED's.

It does accept the industry standard 3-prong plug and it is simple to upgrade from incandescent lights to LED's using this light. It does flush mount with this included grommet and plug. They are required for a complete installation. I do want to give you a few dimensions on just the light itself, edge to edge. It's going to be right at 5-5/16". The height from edge to edge is going to be right at 3-7/16" and the depth of it is 1-1/2" this way and if you measure including this plastic housing where the 3-prong plug goes it'll be 2-5/16" including that. This part includes these two items.

If you do just need the grommet by itself we do sell it separately, it's A33GB. The straight 3-prong plug is the A45PB. Basically what you would do is just drop your light right into the grommet. Push it in all the way. There we go.

Then you take your 3-prong plug and just line the pins up and just go ahead and push it in. You can see now you got it all installed and ready to go. What we're going to do is the three wires coming out, the white with the eyelet is the ground. The red and the black are your power wires. What we're going to do is I'm going to hook this up to a 12 volt power supply to give you an idea of how bright the light is and it's functions. The white wire that comes out would be the ground wire.

The red wire would be for your stop and turn signal and the black would be for your tail light. With it installed here we'll go ahead and turn off the overhead lights, go ahead and turn on the 12 volt power supply. You can see right there, there's your tail light function operating. Then your brakes. You can see when the brakes are applied it's a lot brighter LED. Then when you do the turn signal. We'll go ahead and turn off the power, turn back on our overhead lights. That should do it for the review on part number STL34RB. This is the Optronics Sealed LED Flush Mount Rectangle Trailer Stop, Turn and Tail Light, with the Included Rubber Grommet and 3-prong Plug. .

Customer Reviews

LED Tail Light with Grommet and PL-3 Plug - Stop, Tail, Turn - Submersible - 12 Diodes - Red Lens - STL34RB

Average Customer Rating:  4.9 out of 5 stars   (15 Customer Reviews)

5-1/4" x 3-1/2". Waterproof trailer light serves 3 functions: brake, tail, and turn signal light. Durable polycarbonate housing and lens. Recessed mount with included black PVC grommet. 3-prong plug with 10" pigtail included.


Great product. Still makes my trailer look like a newer model. Highly recommended. 513200


Dealing with etrailer is straight forward. Ordered item#: STL34RB. Product was exactly as described on the web-site and video. Item was a direct fit for brake lights that have proved to be tough to find. I received a call the day after the order was placed from Taylor to verify the shipping address and the item was delivered when it said it would be. Solid customer service and follow-through. I will be replacing all running and marker lights with LEDs and they will be purchased through etrailer.com. Thank you for solid customer service and follow-through. It's nice to know there are companies that still focus on doing a good job at a good price and actually review each order. Thanks etrailer!! 405935


After a year of continuous use, the lights still burn as bright as they did new. No issues with the product at all

Josh H - 07/14/2018



Lights came as expected and on time 619922


Product was as specified. Received it quickly. Installed reasonably easily and works great. I recommend etrailer.com as a good place to purchase product 524201


I ordered a new tail light for my trailer. The website was very helpful at finding and choosing the correct one. Who knew that they made 30,000 different lights for trailers. 420301


The lights were delivered quickly, fit perfectly, were easy to put on, and are much brighter than the incandescents they replaced. After one year and many hours of use they are working great. Highly recommended. 381966


Huge difference from the original lights that were installed on the trailer. Installation took about 5 minutes. The size and fit and wiring pigtail weee exactly as advertised. Fast shipping 370894


Thanks works great in my 97 t600 hood 322026


Great product. 288028


We received the lights today. Our tech installed them and that went smoothly and they look Great. A vast improvement over the existing lights which had issues. Can't ask for more than that. 281824


Great, just fine

SKP - 08/09/2017



Great lites. Bright lites. 247263


Lights were delivered on time and well packaged and look and work great.I had no problem wiring them but i work on some vehicles and trailers but it would be helpful to a lot of people if there was a note identifying which color wire was the running lights and the brake/turn wire color.Thanks Coy in Indiana 89662


Lights are working great and they work and look awesome.Really like them and your place was the only place i could find the right replacements.Great people and company.If i ever need other parts i will order from you.Thanks Coy C

Coy C - 07/16/2014



Good product just what I was looking for 83158


Everything fit great and the lights are really bright. Next time I'm on a foggy highway I will know my trailer is more visible! 81741


Very fast to ship!!! 60840


Ask the Experts about this Optronics Trailer Lights

Do you have a question about this Trailer Light?

  • Replacement Tail Light For Forest River Georgetown XL RV
  • I'd be happy to assist you. It sounds like you need the Sealed, Flush Mount Tall Rectangle LED Trailer Stop, Turn and Tail Light, Grommet and Plug, 12 Diode # STL34RB but most of the pictures I see have round tail lights like the Sealed, 4" Round, LED Stop/Turn/Tail light, 21 Diode - Red # STL55RB. If this is not the correct part, then send me a photo with the measurements of the light and we will get you what you need. The numbers and letters that are actually printed on the light...
    view full answer...

  • Recommendation For LED Replacement Light For a Trucklite 45202 On An Enclosed Utility Trailer
  • The Optronics Tall Rectangle LED Trailer Light, Item # STL34RB, will work for you so long as it will fit. The Optronics light is 6-1/4 inches long x 4-3/8 inches wide x 1-15-16 inches Deep. It is sealed, waterproof, has 3-prong plug connection, and is a flush mount with grommet. I have attached a video for you to check out.
    view full answer...

  • Wiring a 2011 Victory Motorcycle and Trailer for Towing
  • For simplicity, I would recommend wiring the motorcycle trailer as a vehicle trailer would be. A powered converter wiring kit, like part # 119179KIT, would be connected to the motorcycle, which would provide a 4-pole trailer connector. The converter combines the brake lamp and the directional signal onto one circuit. The 4-pole connector utilizes four circuits, the white wire which is the ground, the green wire carries the right turn and brake light combined on one circuit, the yellow...
    view full answer...

  • What Size Hole Is Needed to Install the Flush Mount Rectangle Light and Grommet
  • The Rectangle LED Trailer Stop, Turn and Tail Light, # STL34RB, needs a hole that is 3-3/4 inches by 5-3/8 inches. This light comes with the grommet and the 3 wire pigtail for installation. There is also a right angle pigtail available, # A47PB, if space is limited behind the mounting location for the light. For a really clean looking installation you will want to radius the corners to match the corners of the grommet. I would draw a 3-3/4 x5-3/8 inch square on a piece of paper or cardboard...
    view full answer...

  • Size Hole Required to Install the Rectangle LED Trailer Stop Turn and Tail Light # STL34RB
  • The Rectangle LED Trailer Stop, Turn and Tail Light, # STL34RB, needs a hole that is 3-3/4 inches by 5-3/8 inches to install. There isn't a required thickness of the material needed for installation as long as you have clearance behind where the light installs, but 3/16 inch thick material should work just fine. Check out the review video I attached for more info.
    view full answer...

  • Available Flush Mounted Tail Lights for Camper
  • We have many flush mount taillights to choose from. If you click on the provided link, you can see our selection. We have a few lamps that are similar in size to the Wesbar lamp you mentioned. The Optronics Flush Mount Rectangular Tail Light, part # ST33RB measures 5-5/16 by 3-7/16 inches. It uses a grommet mount, sold separately as part # A33GB and would require a pigtail, part # A45PB. The same lamp is available in a LED version, part # STL33RB which would use the same grommet and...
    view full answer...

  • Trailer Lights Available for a 24V System
  • We do have a handful of 24V trailer light options, but the Optronics Sealed, Flush Mount Tall Rectangle LED Trailer Stop, Turn, and Tail Light, Grommet, and Plug # STL34RB is a 12V light, not a 24V trailer light. For taillights, we have the Miro-Flex LED Red # STL23R24B, Miro-Flex LED Amber # STL23A24B, and Transit Tail Light LED Red Lens # STL90R24B. For clearance lights we have the Thin-Line LED Trailer Clearance/Side Marker Light, Red # MCL66R24B and Thin-Line LED Trailer Clearance/Side...
    view full answer...

  • Trailer Tail Light Options for a Tear Drop Trailer
  • The Aero Pro Submersible LED Trailer Tail Light, # STL36RB, is a surface mount light. To mount this light you would need to have 2 or 3 bolts sticking out from the surface of the trailer because this light has slots on the back that fit over the bolt head and hold it in place. Is does not come with mounting hardware and a special bracket is not needed. The license plate light is made to shine down through the bottom. I would go with a flush mount light like # STL34RB. These lights...
    view full answer...

Do you have a question about this Trailer Light?

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Info for this part was:

Expert Research:
Robert G
Updated by:
Laura H
Updated by:
Brian T

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