Swapping out old incandescent bulbs for this 3/4" round Uni-Lite LED makes a big difference in brightness and reliability. With 2 amber LEDs that last up to 50 times longer than traditional bulbs, you get consistent, vivid light without worrying about brittle filaments or frequent replacements. At 12.8 volts, it only draws 0.03 amps, so it’s both efficient and easy on your power system.
This light is built to handle wet conditions without missing a beat. The housing and circuit board are completely sealed, making it waterproof and submersible—ideal for trailers that get backed into the water. You won’t have moisture creeping in or shorting out your LEDs, so the light keeps performing even when submerged.
Visibility matters when you’re on the road or at the ramp, and this PC-rated light delivers wide coverage that stands out day or night. It produces a 90-degree beam to each side of its centerline for a full 180 degrees of illumination. When mounted correctly, it functions as both a clearance light and a side marker light, adding bright amber visibility from multiple directions.
When space is limited, this compact 3/4" diameter by 7/8" deep round light fits neatly without sticking out or snagging anything. Installation is straightforward—just drill a 3/4" hole at your chosen location and use a recessed grommet (sold separately) to secure it. The simple 2-wire pigtail has one power lead and one ground wire, keeping wiring quick and clean.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today, we're going to be taking a look at the Optronics unilight LED trailer clearance and sidemarker light. This small, round trailer light functions as both a clearance light and sidemarker light when properly mounted, completely sealed, waterproof design is submersible, and it's an LED system. Now, LEDs are going to make great replacements for incandescent lights. They last longer. They burn brighter, and they're much more efficient. You don't have to worry about replacing bulbs and you don't have to worry about brittle filaments.
That's a nice, strong, durable design. When it comes to the lens and housing, we're looking at a polycarbonate construction. It's going to be an Amber light, so it's going to have the Amber lens, two Amber LEDs, and it's designed to be a recessed mount installation with a mounting grommet. Your mounting grommet is sold separately. It's available here at etrailer.com.
The installation does require a 3/4" diameter hole at the desired mounting location, and it's a two wire design, so your wires are protected and then here at the end, you can see that they split. You're going to have a black wire, which is your power lead and you're going to have white wire, which is your ground wire. It's Department of Transportation compliant. It is a PC rated light. When it comes to the dimensions, it's a 3/4" diameter light. The length of the unit measures about 7/8".
It's going to contain two diodes, or two LEDs. When it comes to the power draw, at 12.8 volts, we're looking at 0.03 amps. Optronics puts a lifetime warranty on the LEDs. We're going to go ahead and hook it up to power, that way you can see what it looks like. We'll also turn off our overhead light, so you can see it in a lower light setting.
You can see, here, that it sends out a really bright, consistent signal. Again, it's going to contain two diodes, or two LEDs. The multi diode design really helps optimize the light output of the unit. That's going to do it for today's look at the Optronics unilight LED trailer clearance with the sidemarker light.
Ratings & Reviews
Extremely happy with customer service and all products I have purchased from etrailer.
I ordered these light to be used as accent light on a new lift table for my company. I needed low profile and fairly bright red light to be reflected off our off-white power coat. These little lights out preformed what we were hoping for. The only thing I don't like about them is the instructions say to drill a 11.16" hole. Assembly was WAY too tight at that dimension. So we stepped it up a fraction at a time and found that 17/64" (.73) and 3/4" (.75) were perfect. Even at 3/4" the grommet was snug and water tight. The light had to be squeezed into place but at 11/16" I felt like I was about to brake the light.
Overall I am super pleased with the lights. We added them to the Bill of Materials and we will be ordering them for these new carts.
I have purchased lights from etrailer several times and the service and quality have been great. I have purchased lights for my truck and also have used there submersible lights for my boat trailer.
lights have been in service for over a year and still bright as the first day I installed them.
Shipping was slow, but I can't complain much considering it was free!
I chopped the fenders on my 2008 Jeep Wrangler, which involved removing the side marker lights. I installed a pair of these DOT approved lights to meet inspection requirements.
As for the lights, they are well-constructed and very bright. Installation was difficult; even after drilling and deburring a 11/16" hole, the grommet barely fit in. I had to put a small amount of grease on the light's lateral surfaces before the light would slide into the grommets.
Overall, I am very pleased with the product. Poison Spyder sells an inferior product at several times the price; I am glad I found these here!
These are really nice marker lights. Nice and bright.
These are really nice marker lights. Nice and bright.
Very well built, sturdy and totally sealed against moisture. I installed these into the top of my Haulmark enclosed trailer to act as clearance lights. Installation was a breeze, I just drilled a 3/4" hole with a step bit, wired all five lights together and tied it into the running lights of the trailer's harness. I put the ground against the steel frame. I went a step further and put a bead of clear marine grade silicone around the light to ensure no moisture makes it inside the trailer despite these being a tight fit. As you can see from the pictures, installation is clean and they're very bright, both day and night! I put one on either end, 6" from the sides and the three middles ones are spaced 10" apart. Similar to the clearance lights on a truck, I didn't use a template, just winged it.
Great little running light puck! Easy to install and very bright at night and is even very visible in daylight. Only about an inch in diameter on the outside, you wouldn't think it was much larger from the amount of light they provide.
I actually purchased these lights to use as a side marker light on my Jeep Wranglers after installing after market fenders. Lights have worked fantastic up to this point
These were designed as a clearance light application and at a great price. I bought them to use as turn signal lamps on my RZR. They are high quality and extremely bright when lit, so they work great for both applications. These guys have great parts at a great price and quick shipping. I would recommend them to anyone needing trailer/boat/lighting. Thanks guys.
Great addition to the basic, rear brake lights of a camp trailer.
I added these LED RED to the brake/turn function, within the existing, small holes in the rear bumper--much more apparent when stopping/turning.
These sealed LED lights are very common on larger trucks and trailers now. Easy to install and very robust assembly...priced right!
Perfect fit. Fast shipping
I have finally finished the install of the great products that I’ve purchased from Etrailer. Curt 24K 5th wheel hitch, the lube discs, the front receiver hitch tube, the Factory 7-way connector and 7 -way extension (I have 3 7-way plugs on my truck) and the countless number of LED lights. The service is amazing and the customer service I received was fabulous. I really like these folks as they were vary knowledgeable about what I was after and pointed me in the right direction to accomplish my end goal. Thanks to everyone at Etrailer. I couldn’t have done it all without you.
I bought a couple more of these two-diode LED clearance lights to add some more lighting to the rear of my kayak trailer. They work nice and are easy to install in 3/4" holes that I drilled through a piece of aluminum angle. The trailer has orange clearance lights on the front sides, red clearance lights on the back sides, the stop/turn/parking lights on the back, three red clearance lights on the back, and a white LED license plate light. It's really lit up and very visible at night from the rear and sides. Thanks to etrailer.com for great products and services!
My wife and I like to kayak, but we don't like to deal with putting our kayaks on roof racks on the top of a car. So I bought a used Load-Rite trailer that was designed to hold one Jet Ski, and added a frame made of slotted angle and 2x6 lumber to hold the kayaks, and a cargo box from Tractor Supply to hold kayak seats, life jackets, towels, sun-protection clothing, and some spare gear (ropes etc), and bought all new LED lighting from etrailer.com. The paddles are too long for the cargo box so they have to go in the car! The kayaks are tied down to the trailer with several ropes front and rear, so there is a lot of safety factor in the design....I don't worry about the kayaks coming off the trailer! The entire rig works great....when we return from a kayak trip we just back the trailer in the barn and it's ready to go for our next trip. I put a 5" diameter wheel on the trailer just behind the hitch so I can push it around on flat level surfaces. See the pictures.
The lights are perfect as were the previous ones. I’m always doing projects and these are my go to lights for markers and clearance lights.
These are excellent lights. Very small and compact with a very bright output. I used these as marker lights on the rear of my pickup, and it made a huge difference in visibility. Being only 3/4", you can install these in a variety of locations and for a multitude of applications. I highly recommend these and will be purchasing more for additional lighting needs.
Everything I ordered was great.
Will contact you folks again when I need more items.
Nice light. Very bright
After a year this light is working very well. It's bright and reliable.
Great product, excellent price, and fast shipping!!
Great quality and easy to install. Perfect marker lights for trailers
They have/had just what I needed to replace a light which a mouse or chipmunk chewed the wires off of. The lights work and look great. I ordered extras just incase they attach another set of wires.
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