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This low-profile LED combination light handles everything—stop, tail, turn, side marker, side reflex reflector, rear clearance, rear reflex reflector, and license plate illumination. It uses 16 diodes for a bright, even output while drawing minimal power at 12.8 volts (0.163 amps for stop/turn, 0.095 amps for tail, and 0.163 amps for the license plate). The LEDs last up to 50 times longer than incandescent bulbs and don’t have filaments to break or burn out, so you get consistent lighting with less maintenance.
If your trailer ever sees wet roads or gets backed down a ramp, this light’s sealed design keeps water where it belongs—outside. The housing and lens are sonically sealed into one waterproof unit that protects the LEDs and circuit board from moisture and corrosion. It’s built to handle full submersion without fogging or failure, so you can count on it every time you hit the water or drive through heavy rain.
This light uses surface-mount technology (SMT) for its LED circuit board, which helps it better withstand shock and vibration from rough roads. The improved heat distribution keeps the electronics stable and extends the life of the LEDs. A tough polycarbonate housing and acrylic lens add even more durability, making it ideal for long-term use where reliability matters most.
Mounting is straightforward thanks to the stud-mount design and included stainless steel hardware. The light installs flat against any surface—no need to cut holes—using the built-in flange for a clean fit. The 3-wire pigtail keeps hookup simple: white for ground, black for tail light, and red for turn signal. With an overall size of 5-1/4" long x 4-1/2" tall x 1-3/4" deep and 2" center-to-center mounting studs, it’s compact yet easy to secure in place.

When properly mounted at the outer corners, this driver-side combination light provides all the necessary rear functions for trailers over 80" wide—including rear clearance lighting to show full trailer width from behind. It’s designed as a complete left-hand solution that pairs with the matching passenger-side model (STL82RB sold separately) to create a compliant lighting setup that increases visibility and safety on the road.


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Speaker 1: Today we're going to be taking a look at and showing you how to install the Optronics LED Combination Tail Light for trailers over 80 inches wide. Part number is STL83RB. Now for the passenger side, that part number is STL82RB. Here's what our lights going to look like installed. As you can see, with the LEDs you get really full, bright color. Going down the highway, you can definitely see that the LEDs stand out, as compared to the incandescent lights.
Now these lights work out really well on all styles of trailers, but they do meet the specifications for the trailers over 80 inches wide, so long as you have them mounted on there properly, you'll be right with those specifications that are required.And since we are using LEDs, rather than the filament style or incandescent bulbs, these are going to last much, much longer. So you're not going to have to worry about the lights not coming on when you're ready to head down the road, and having to fumble around, find bulbs and replace them. They also use a lot less energy, so we're not drawing as much power through the lighting system to light these and the other lights you might have on your trailer.Nor our driver's side light here offers seven functions, six of those are shared with the passenger side as well. For example, we've got our running lights, we're going to have our brake light and our turn signal. But we're also going to have the rear clearance light here and our side marker light here.
In addition to that, we have the reflex reflector both here on the side and on the back. Now those are shared side to side. The only real difference we have at the driver's side would be that here on the bottom, we also have a white light designed to illuminate our license plate area.Now the lights are fully submersible, they've been sealed appropriately so they can come in and out of the water without experiencing any damage. However, we do recommend that you unplug your lights before backing in the water, just to prevent any kind of shorting. Now in total, our light's going to have 16 diodes to give us plenty of illumination.You notice here that our mounting holes are on two inch centers, so from center to center we've got just two holes.
And even on the shorter bracket that we have here . This is a smaller boat trailer, but even on the shorter bracket, there is enough room for it to actually fit in place. In some of the longer, more rectangular shaped lights you kind of lose the ability if your hole is too close to your trailer. So this can be a nice solution for you.When we begin the installation on our light, we're going to take a small 5/16 inch ring terminal, and see that's going to slide right over our stud there. Place that on and get it crimped in place.
Then with our ring terminal on there, we'll place our license plate bracket on our light. With that put in position, then we can secure it with a flat washer, a lock washer and a nut. You just want to make sure your ground goes on one of your two studs. I like the one closer to the trailer, just to keep it more protected. Then we'll do the same thing for our other stud here.Once that's installed, we'll get it snug down and we can use our 10 millimeter socket to tighten it up. Now we can trim off our trailer wire there. You want to give yourself a little bit of slack. And also, I like storing some back here on this backside. So if you have too much, just get it tucked in there and zip-tie it up and out of the way. We'll separate our wires, and our brown needs to go to our black wire. Our yellow, for our break and turn signal, it's gonna go to the red.We're going to get all four of them stripped back appropriately. And on each of our wires there, we're going to add a heat shrink butt connector, especially since this is one a boat trailer. Keep our connections very well protected, so that these heat shrinks, they'll shrink down and protect it, so we won't have to worry about corrosion. Now the other side of those, and you go to the appropriate wire.We'll use a heat source to shrink these down. You can use a heat gun, you can use a lighter or a mini torch. Just don't want to overheat it. You'll notice when its fully shrank down, that wire looks like it gets bigger. There's a little clear gel that comes out of the end on them. Really does a great job of sealing up that connection, so we won't have any issues.You can see here on the right side of the boat, we've done the exact same thing. The only difference is going to be the green wire that comes out, that needs to go to the red, where on the other side we had the yellow wire going to the red. You'll do brown to black and then white to ground. And to give ourselves a little additional protection, we can use a piece of wire loom. Just get those wrapped up.Now, with everything hooked up, let's test it and make sure it's working properly. And we've got our running lights, our left turn signal, our right turn signal, and our brakes. That's going to complete our look at the Optronics LED Combination Tail Lights for trailers over 80 inches.
Customer Satisfaction Score:
100% were satisfied with this product
0% of customers were not satisfied
Ratings & Reviews
Good value prompt service
1 year later, lights are still doing great.
Has been a great light and haven’t had any problems out of it.
lites are bright . no shorts they ,work great i'm very happy, their not over sized so they dont get broken by rocks when going down dirt roads.
Clear and bright lighting
Got it installed on the trailer and back on the road!
Easy parts look up and found the exact replacement needed to repair the broken one. Etrailer is my “go to” for my trailering needs!
Not worth the high price. They are no better than cheaper ones, being just as likely to break. Also the attachment method seems pokrly designed, sincethe fasteners (NOT provided!) Just fit in slots, and if they loosen it will only be the wires securing them as they bounce around to destruction. Don't buy them.
Bought these and a few other led lights for a trailer I pulled out of a field. The work great would buy all again. Great service fast shipping.
I received my trailer light for my boat trailer and easily installed it. All led lights work on backup, brake, and turn signals as advertised.
Had issues with USPS and got great assistance from Emily at etrailer.
Purchased this lamp to replace the under 80 inch trailer lamps I mistakenly purchased on [online].
This lamp was nice and bright with copper wiring. [online] lamps were bright as well but had much thinner wiring and appeared to be aluminum. The [online] lamp wiring was at least colored coded to match the trailer harness, unlike these lamps which were black And red ( black - marker, red - turn brake) Yes I know that is minor.
[online] lamps were XX.00 dollars and came with mounting hardware.
HOWEVER,
For the price of the lamps it could have at least come with mounting hardware. One other purchaser had mentioned no hardware but I attributed it being packaged incorrectly. Nope, reviewer was correct, the lamp didn’t come with mounting hardware.
Used small 1/4 inch by 3/4 inch carriage bolts with flange nuts to mount the lamp
Great shipping time. Was surprised there was no mounting screws for this but they wasn't advertised and this particular LED I was able to use the old hardware. Very pleased with product and etrailer!!
I purchased these to upgrade from the incandescent bulbs. Easy to install. Since it didn’t come with mounting bolts I found some in my garage that worked. Look and work great.
The product came in a package with no damage. The light was delivered early and had a clear cover to protect the lens during installation. There was extra wire available if you need it for splicing. The other benefit this was a direct replacement to what was on my trailer.
They had what I needed in stock and it came in a couple days. Light work great.
Missing mounting hardware
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Herman B.
11/25/2021
Noticed last week that only half of the turn signal lights are working. Havent had time to check it out. I still have one row of bulbs flashing so I still have some indicator. Probably a broken link but just need to explore it more. Still a good product.