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Optronics LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 10 Diode - Oval - Red Lens
Optronics

Optronics LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 10 Diode - Oval - Red Lens

Part Number: STL78RB
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Trailer Lights STL78RB - Submersible Lights - Optronics
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7-9/16" x 3-5/16" Oval. 3-Function, waterproof LED light acts as brake, tail, and turn signal. Durable polycarbonate housing and lens. Surface mount with built-in flange - hardware not included. 3-Wire design. Great Prices for the best trailer lights from Optronics. Optronics LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 10 Diode - Oval - Red Lens part number STL78RB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (719)
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Optronics Trailer Lights - STL78RB

  • Tail Lights
  • Oval
  • LED Light
  • Red
  • 6-1/2L x 2W Inch
  • Surface Mount
  • Stop/Turn/Tail
  • Submersible Lights
  • Optronics

7-9/16" x 3-5/16" Oval. 3-Function, waterproof LED light acts as brake, tail, and turn signal. Durable polycarbonate housing and lens. Surface mount with built-in flange - hardware not included. 3-Wire design.


Features:

  • Red, oblong light functions as stop, turn, and tail light
  • Sealed, waterproof housing and lens unit
  • Corrosion resistant
  • 10 Super LEDs (Light Emitting Diode)
  • Flange mounts with four mounting holes in the center of each side
  • Wiring design contains lead wires and a ground wire to mount to all surfaces
  • Wire functions:
    • Red: Turn signal and brake
    • Black: Tail light
    • White: Ground


Specs:

  • Overall dimensions: 7-9/16" long x 3-5/16" tall x 3/4" thick
  • Distance between mounting holes (center to center): 7" long x 2-3/4" tall
  • Diodes: 10
  • Power draw at 12.8V:
    • Stop/turn: 0.243 amps
    • Tail: 0.046 amps
  • Lifetime warranty on LEDs


Optronics STL78 Series Combination Trailer Tail Light 6 Inch Oval Sealed LED Light Surface Mount Diagram

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.


Surface-Mount Light

Surface mount light

Surface-mount lights install flat against the surface of the trailer, so a hole does not need to be cut into the trailer for the light. This type of light is installed using a flange or bracket that has mounting holes. And mounting hardware is used to secure the light to the trailer.



STL78RB Sealed, 6-1/2" Oval LED Trailer Stop, Turn and Tail Light, Flange Mount, 10 Super Diode 0.243V/0.046A

Alternate part number: STL-78RB




California residents: click here


Customer Satisfaction Score:


Customer Reviews

Optronics LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 10 Diode - Oval - Red Lens - STL78RB

Average Customer Rating:  4.8 out of 5 stars   (719 Customer Reviews)

7-9/16" x 3-5/16" Oval. 3-Function, waterproof LED light acts as brake, tail, and turn signal. Durable polycarbonate housing and lens. Surface mount with built-in flange - hardware not included. 3-Wire design.

by:

Light was the same size as previous one on EZ Loader boat trailer. Easy to install and very bright. Original one made it 10 years and had moisture inside causing most of the LEDs to stop working.



by:

Very clean installation on my home-built e-tricycle carrier. Works perfectly. Nice and bright!



by:

Wasn't sure if this was the exact same light as the one that I had since my trailer light was totally destroyed. It did look like the one that was still in place. So I ordered it and it was shipped very quickly and it was an exact match to the one that was still attached. Thank You for having the exact replacement it's all installed and ready for my next trip

Brooke M. profile picture
Etrailer Expert

Brooke M.

5/20/2024

Thats awesome to hear! Where are you all headed next?



by:

Exact replacement fit for my Homesteader trailer. Even the screw holes lined up.



by:

I bought these to replace similarly-sized ones that came OEM on my trailer and stopped working after water had somehow found a way inside the case. These have been wonderful. Easy to install and they just work



by:

Nice design and quality material make this replacement tail/brake light an easy upgrade. Best part is changing over to LED lighting..using less battery juice and eliminating incandescent bulb failure…Txs



by:

Been dealing with this company for several years. As usual, great service and products.

Wcc profile picture

Wcc

10/8/2024

Still working great.



by:

This product was a perfect replacement for OEM. Installation was simple. Ordering process and delivery by eTrailer was spot on. I will definitely continue to utilize eTrailer for my future trailer repair and upgrade projects.



by:

These are good quality lamps at a great price. They're simple to install. A year later and they are still working as expected.



by:

After one of the the incandescent trilights the factory installed on my trailer burnt out I discovered they where sealed and the bulbs could not be replaced,
So I purchased two of these and discovered they are ery nice lights and unlike incandescent lights they don't screw up the turn signal flash rate.

I am now in the process of rebuilding a trailer mounted generator and just ordered 2 more of them for that trailer and I also bought LED marker lights from the same manufacturer.

If you need new or replacement taillights or marker lights LED's are the way to go, long lasting, nice and bright and in my opinion they way they instantly light up get more attention from drivers behind me possibly reducing the chances of getting my trailer rear ended by a inattentive driver.



by:

After figuring out what wires were what on my trailer and the lights everything works as it should.

Donald profile picture

Donald

2/17/2024

After a year everything is still working as it should.



by:

It came when promised and the product performed perfectly

Heather A. profile picture
Etrailer Expert

Heather A.

9/24/2024

Roger that looks amazing! Thanks for the video.



by:

Now that I'm finishing up on my Teardrop Trailer I've got these lights installed, along with a LED tag holder, and LED marker lights. I had also bought the fenders from etrailer they look great, and I get a lot of comments how good all these parts look. Oh and the prices are better then any place I could find.......Thanks etrailer



by:

The 10-diode tail lights were well made, bright, and easy to install. We also ordered and installed the matching reflector rings, which were also easy to install, look great, and give added safety features.

Kathryn profile picture

Kathryn

10/14/2022

Lights are sleek and a perfect replacement. Still doing an excellent jodb! Would purchase again if needed.



by:

I bought one of theses lights last year to replace one that had some of the LED's going out. Same manufacturer and same part number. The new light uses a different type of LED (square LED). The old style used an LED that looks more like a small bulb. I have 4 of these on the back of my 5th wheel trailer. The other three started going bad so I just replaced them as well. I have other LED lights inside the trailer that use the same type of LED as the new tail lights. I've had those lights for 6 years with no problems. . I suspect these new lights will last much longer with the new type of LED.



by:

Wired them in and they light up, blink, and do everything else they're supposed to do. Let me also mention that they are BRIGHT at night. Loading the boat onto the trailer at dusk/after dark they're almost blinding when the pickup driver steps on the brakes. Lol



by:

Good product. Horizontal bolt hole spacing is the same as a license plate so it conveniently mounts anywhere a license plate would. The LEDs are bright enough as auxiliary running/turn/brake lights and the wiring is simple. The mounting flange is not very strong plastic so you have to be careful not to crank down on the mounting bolts. There is no hardware included and no gasket for the backside, which is a bummer. Otherwise, a very nice product.



by:

Customer service was Awesome and light works Great Thank you



by:

Easy install looks great on my trailer without needing to cut the oblong holes for the light. Only need to drill a small hole for the wires and the mounting screws.



by:

AAron H. Was extremely helpful to me ensuring that the item I needed was available to be shipped out and received my order in 2 days. He is very personable and pleasant to deal with. I would order other items from etrailer as I have in the passed. Very good prices and items received quickly. I recommend them to everyone. Always a great experience.
I would definitely order again from Aaron H.!!!!



by:

Very nice product. Installation on my very old utility trailer was easy. I like the slim design compared with my old chunky incandescent lights which were easy to break and not as bright as these LEDs.



by:

I had a hitch carrier in the garage and wanted to add brake lights/turn signals. Since there were no mounting locations for lights, I needed a surface mount option. These fit the bill. They work great and were easy to wire with the harness I bought.



by:

Quality product well made and designed,
Reasonably
priced. Best suited for my application. Also purchased the red reflector snap ring that covers the mounting flange and screws.



by:

Was exactly what I needed: Surface mount, holes exactly 7 inches apart for the sides. Needed it for a replacement on our 2018 Grand Design 399TH Momentum.



by:

Worked great as a replacement for OEM that was no longer available for RV. I also replaced the back side marker lights so the front and back matched.
Pat C did a great job in completing my order with substitution for out of stock resistor.


25
719
Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • Is There a Gasket for the Optronics LED Trailer Tail Light STL78RB?
    No, I am sorry Randy there is not. The Optronics LED Trailer Tail Light item # STL78RB has a built in flange but we do not have a gasket for it.
    view full answer...
  • Recommended Optronics Tail Light With 3-Prong Plug Attached
    I do have options for you. We have the Optronics # STL78RPG, which is essentially the Optronics LED Trailer Tail Light # STL78RB with a 3 prong attached. We also have the GloLight LED Trailer Tail Light # STL178RFPB. This light is identical in size to the light you mentioned, and will come with the 3 prong plug attached. The only difference is that the # STL178RFPB is a 22 diode instead of a 10 diode, so it will be a brighter light.
    view full answer...
  • Availability of 6 Inch Long Oval Red and White Light Assemblies
    The closest options we have available to what you are looking for are the Red GloLight LED Trailer Light # STL111RB and the White GloLight LED # BUL111CB. Both light assemblies can be paired with the PVC Grommet # A70GB and feature a sonically sealed, waterproof housing and lens that is submersible. The red light assembly can be used with the 3-Wire Pigtail # A47PB and the white assembly will work perfectly with the 2-Wire Pigtail # A49PB. The light assemblies measure 6-1/2 inches long,...
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  • LED Trailer Taillight Recommendation for Fulton F008564 Plastic Fender
    Typically trailer lights don't end up on fenders, but since your plan is to use this fender # F008564 on a tow dolly I could see how that would be required. On the ends of the fender where the plastic goes vertical you could mount the Sealed, 6-1/2" Oval LED Trailer Stop, Turn and Tail Light # STL78RB. I attached a picture that points out where that would be.
    view full answer...
    Image 1 for
  • Do Optrionics LED Trailer Light # STL78RB Come as a Set or Sold Individually?
    The Optronics LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 10 Diode - Oval - Red Lens # STL78RB is a single light. If you want a set, you will need to change the quantity box on the product page when ordering. I've attached a photo of the dimensions of the light as well as the mounting hole locations to assist. You may also be interested in the accent ring # A78CB or reflector # A78RXB which snap on to cover the mounting screws.
    view full answer...
    Image 1 for
  • What Light Assembly Does Snap-on Reflector Ring # A78RXB Fit
    Although the Snap-on Reflector Ring, # A78RXB, will not fit the STL178 series lights like the Optronics GLOLight LED Stop/Turn/Tail Light # STL178RFPB, I do have a solution for you. Take a look at the Sealed, 6-1/2" Oval LED Trailer Stop, Turn and Tail Light, # STL78RB. This light was designed to be used with the reflector ring. I spoke with my contact at Optronics and they do not offer a reflector ring for the STL178 series lights. The lights look incredibly similar but the light you...
    view full answer...
  • Picture Request for the Snap-On Reflector Ring Installed on a Optronics 6-1/2 inch Oval Light
    I went out in to our warehouse and pulled a Optronics Trailer Light # STL78RB and a Snap-on Reflector Ring for STL78RB Series LED Lights # A78RXB to show you what they look like together. I attached a picture and a video I shot also.
    view full answer...
    Image 1 for
  • Is the Optronics Light part # STL78RB Sold Individually or Separately
    The Sealed, 6-1/2" Oval LED Trailer Stop, Turn and Tail Light # STL78RB that you referenced is sold individually.
    view full answer...
  • Is the Optronics LED Trailer Tail Light item # STL78RB DOT Approved?
    Since the Optronics LED Trailer Tail Light item # STL78RB is red it can be used as a third brake light. This light is DOT approved and can also be used as a rear turn signal. To use it only as a third brake light you will want to wire the black tail light wire and the red stop/turn light wire to one circuit. The white wire is ground. If you are needing to add a turn signal on the side of your trailer you will want to use an amber light like the item # STL78AB. I have linked a review video...
    view full answer...
    Image 1 for
  • Amber Version of LED Stop//Tail/Turn Wesbar 273564
    Yes we do. You would want the part # STL22AB for an amber version of the light part number you listed. Another option is the part # STL72AB or part # STL70AB.
    view full answer...
  • Can Clearance Lights be Installed on Side of Trailer as Additional Turn Signals
    The DOT rules are typically that if the turn signal is facing the side of the trailer it needs to be amber in color like the part # STL78AB and then if facing the rear it can be amber or red like part # STL78RB. However, if the light also carries the stop light circuit it would have to be red. You would need to check with your local DOT to confirm this, but in the meantime I attached a help article on trailer lighting options as well. To do what you are looking to do would require you...
    view full answer...
  • Components Needed to Build a Trailer From Scratch with the Timbren Axle-Less System
    I would be happy to help you put together the components you need to build your own trailer and do my best to keep the weight down. You are off to a good start with the Timbren Axle-Less Trailer Suspension System - Spindle w/Brake Flange item # ASR1200S04. These weigh around 50 lbs. However, the brakes you linked item # 23-48 are for 7" hubs and we do not have any that will fit the Timbren systems so you will need to go up to 10" hubs and drums. I recommend the Dexter Trailer Hub and...
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  • Comparing Oval 6-1/2" Trailer Tail Lights Red or Clear Lens
    In regards to using a trailer tail lights with clear lens like part # STL88RCB or red lens like part # STL78RB, this will come down to local laws and regulations concerning trailer tail lights. There are certain areas where using a trailer tail light with clear lens is illegal but this is not true for all areas so you will need to check ahead. That said, you would most likely not run into any trouble using either although the red lens is much more common.
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  • Availability of LED-Type Oval Trailer Stop/Turn/Tail Light
    We do offer many high-efficiency LED-type trailer stop/turn/tail lights in the 6-1/2 x 2-1/4-inch size of the Optronics # ST70RBTK that you referenced. All can be seen on the linked page. All lights shown are submersible. You can choose from either recessed mount lights like # STL22RB or surface mounts like # STL78RB.
    view full answer...
  • Can LED Trailer Stop, Turn, and Tail Lights be Installed on Guide Posts on a Boat Trailer
    Technically you could install LED tail light # STL78RB wherever you wanted. I haven't seen stop, tail, and turn lights on guide posts but I'm sure it can be done. If you just want lights on the guide posts to make them easier to see then there are lights just for that, # CE27656A. They fit on 2 inch diameter posts. You might also be interested in some conspicuity tape such as # 465-4K.
    view full answer...
  • Optronics Oval LED Light Recommendation to Replace an Older Style Optronics Light
    I do have a solution that should work for you, but we do not carry any Optronics lights with the style connector you have. You could get a Optronics Trailer Light # STL78RB that you referenced, and to install it you would just want to cut of the connector that is on your trailer and then wire the the three wires to the wires of the # STL78RB. The white wire of the # STL78RB will run to the ground wire of your trailer wiring, the red will run to the turn signal/brake wire and the black...
    view full answer...
    Image 1 for
  • Trailer Tail Light Replacement Recommendation for TecNiq 16P2S2T2T60
    I believe the tail lights you have are the TecNiq T60 lights which are industry standard 6" oval recessed lights. To replace those you can use the Optronics Fleet LED Trailer Tail Lights # TLL12RK. If your lights look different than this please send in a picture with some dimensions so I can help you find the correct replacements.
    view full answer...
    Image 1 for
  • How Does the Optronics Trailer Lights # STL78RB Wire to the Passenger Side of a Trailer
    On the right side of your trailer the green wire should be the right turn/stop signal and the brown should be the running or taillights. So basically the brown of your trailer should run to the black of the light, the green of your trailer should run to the stop/turn signal, and the white should run to the white. If that is how you wired it up on your trailer and you are still having problems when the headlights are on that would indicate you have a ground issue. What you will want to...
    view full answer...
  • Picking Out Replacement Trailer Taillights for 2009 Cargo Pro Trailer
    I tried pulling up pictures of your 2009 Cargo Pro Trailer on Google and from what I was able to find it looks like your trailer uses taillights like the # TLL12RK which are a recessed mount that come with a grommet. So for a single light you'd want the part # STL72RB with the grommet # A70GB and if you need a pigtail harness part # A47PB. If you have something different email be back a picture and I'll see what is the best match for it.
    view full answer...
  • Can I Use Optronics Trailer Light # STL22RB On My Coleman Camper
    For the exact size replacement light for your camper trailer you will need to measure your lights. The Optronics Trailer Light # STL22RB, measures 6-1/2 inches long and is 2-5/16 inches wide. If your light is a different size or you do not have the right mounting hole, you can use Optronics Trailer Light, part # STL78RB, which is a flange mount light which does not require a mounting hole. To wire in the lights, you will need 3-Wire Pigtail, part # A45PB. The grommet that you will need...
    view full answer...
  • How to Light Up All Diodes of Optronics LED Trailer Tail Light # STL78RB
    If you want all of the diodes of the Optronics LED Trailer Tail Light # STL78RB to light up you'd need to run power to the black and red wires and then ground the white.
    view full answer...
  • Matching Red and Amber Optronics LED Trailer Tail Lights
    We do have the matching red and amber LED trailer tail lights you are looking for. These are the same size (7-9/16" wide x 3-5/16" tall x 3/4" deep) lights with 10 diodes, and they hardwire in. So what you need are the following: - Optronics LED Trailer Tail Light - Red Lens # STL78RB - Optronics LED Trailer Parking Light with Turn Function - Amber Lens # STL78AB I've added links below to video reviews for you to check out as well if you'd like.
    view full answer...
  • Troubleshooting Trailer Left Turn Signal Light That Does Not Blink
    Its usually easiest to disconnect the trailer from the vehicle and test the trailer functions directly by connecting 12V power from the vehicle (or another) battery right to the various circuits on the trailer plug. This way of testing isolates the trailer from any issues that might be present in the vehicle wiring, such as a mis-wired connector. If you do this and the trailer light does not do what it is supposed to do, then check both your main trailer connector ground and the problem...
    view full answer...
  • Stop, Turn, Running and Reverse Lamp Compatible with Optronics A78RXB Snap-On Reflector Ring
    The # A78RXB snap on reflector ring you mentioned is only compatible with Optronics STL78 series taillights like the # STL78RB , none of which has the provision for a reverse lamp. Your best bet would be to use a # STL78RB stop/turn/taillight and a separate reverse lamp like # BUL78CB which is a surface mount lamp like the # STL78RB.
    view full answer...


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