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Uni-Lite LED Trailer Clearance and Side Marker Light - Submersible - 2 Diodes - Round - Amber Lens

Uni-Lite LED Trailer Clearance and Side Marker Light - Submersible - 2 Diodes - Round - Amber Lens

Item # MCL11AB
Our Price: $3.62
Trailer Lights
Shipping Weight: 0.02 lbs
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3/4" Round. Waterproof mini trailer light with 2 amber LEDs functions as both a clearance light and a side marker light when properly mounted. Amber polycarbonate lens. Recessed mount with grommet (sold separately). 2-Wire pigtail. PC rated. Great Prices for the best trailer lights from Optronics. Uni-Lite LED Trailer Clearance and Side Marker Light - Submersible - 2 Diodes - Round - Amber Lens part number MCL11AB can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (668)
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  • Videos (1)
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Optronics Trailer Lights - MCL11AB

  • Clearance Lights
  • Round
  • LED Light
  • Amber
  • 3/4 Inch Diameter
  • Recessed Mount
  • Rear Clearance
  • Side Marker
  • Submersible Lights
  • Optronics

3/4" Round. Waterproof mini trailer light with 2 amber LEDs functions as both a clearance light and a side marker light when properly mounted. Amber polycarbonate lens. Recessed mount with grommet (sold separately). 2-Wire pigtail. PC rated.


  • Small, round trailer light functions as both a clearance light and a side marker light when properly mounted
  • Sealed, waterproof construction 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
  • Amber LEDs with amber lens
  • Recessed mount with grommet (sold separately)
    • Installation requires a 3/4" hole at desired location
  • 2-Wire pigtail - includes power lead and ground wire
  • DOT compliant
  • PC rated


  • Dimensions: 3/4" diameter x 7/8" deep
  • Diodes: 2
  • Power draw at 12.8 volts: 0.03 amps
  • Lifetime warranty on LEDs

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.

PC-Rated Lights

Diagram of light spread for PC rated light

A PC-rated light produces a 90-degree angle of light to either side of its centerline for a total of 180 degrees of coverage. This beam pattern can be clearly seen when you are standing directly in front of the light, as well as when you are standing on either side of the light. When properly installed, this type of light can function as both a front clearance light and a side marker light or as a rear clearance light and a side marker light.

MCL11AB Optronics Uni-Light Mini LED Side Marker/Clearance Trailer Taillight - PC Rated - Amber

California residents: click here

Video of Uni-Lite LED Trailer Clearance and Side Marker Light - Submersible - 2 Diodes - Round - Amber Lens

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

Video Transcript for Optronics Trailer Lights - Clearance Lights - MCL11AB Review

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

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.

Customer Satisfaction Score:

Customer Reviews

Uni-Lite LED Trailer Clearance and Side Marker Light - Submersible - 2 Diodes - Round - Amber Lens - MCL11AB

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

3/4" Round. Waterproof mini trailer light with 2 amber LEDs functions as both a clearance light and a side marker light when properly mounted. Amber polycarbonate lens. Recessed mount with grommet (sold separately). 2-Wire pigtail. PC rated.


After a year this light is working very well. It's bright and reliable.


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.


Great quality and easy to install. Perfect marker lights for trailers


Great product, excellent price, and fast shipping!!


Nice light. Very bright


Will contact you folks again when I need more items.


Everything I ordered was great.



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.


Product is spot on, fit finish and function. More importantly the whole ordering/delivery process worked to perfection. Our company was in a tight jam with one of our transport trailers and needed these lights pronto,
e-trailer came to our rescue and didn't even know it. That in itself proves that customer service is
e-trailers standard priority.


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 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 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.


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.


Great item at a great price. Purchased 4 clear with red (2-diodes) to place in my rear step bumper in place of back up sensors for my older truck used as clearance/running lamps.
Fitment was up to me being had to locate rubber grommets to adapt to these smaller 3/4" lights to the 1 1/8" bumper holes.
I would give these 5 stars but for some reason the black wire is the HOT, while any automotive electrical item I be ever worked on the BLACK was the ground! Opposite here and recommend testing them before you hook up like I did then had to reverse wires..
Silly mistake on my part but why is the black (+) and white (-) ???
Otherwise they're bright and add to my otherwise dark OEM tail lights for increased safety. Pic shown is during daylight!


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!


They are low profile in the day, and very functional in the night with their brightness. I did not expect them to be this good. I wired them as marker lights for my rear fenders.


I installed these on my home built teardrop. Worked out very well. Total current draw is under 400 mA for all lights.


I installed these lights on my old enclosed trailer because most of my old lights were broken after many years.
Very bright!
I did drill holes in my trailer because my old lights were big rectangular ones.
These and the led taillights I got really make my trailer much more visible.


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


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.


Got exactly what I ordered in a timely manor. Very pleased with my order and will order from this company again if I need something for my horse trailer!!


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.


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!


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.


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.


Added these lights on my motorcycle trailer, and they are perfect!

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Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Jameson C
Expert Research:
Jameson C
Employee Cole B
Installed by:
Cole B
Employee Amy B
Written by:
Amy B
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T

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