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Uni-Lite LED Clearance and Side Marker Light w Grommet - Submersible - 2 Diodes - Clear Lens - Red
(845 reviews)
Price: $10.60
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Uni-Lite LED Clearance and Side Marker Light w Grommet - Submersible - 2 Diodes - Clear Lens - Red
Part Number: MCL11CRKB
In Stock
$10.60
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- All Info
- Reviews (845)
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- Videos (2)
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Optronics Trailer Lights - MCL11CRKB
Highlights
- Brighter Light, Less Power: Two red LEDs deliver strong visibility while drawing only 0.03 amps.
- Reliable In Any Weather: Sealed, waterproof design is fully submersible to keep water out.
- One Light, Two Functions: Works as both a clearance and side marker light when properly mounted.
- Compact Fit Anywhere: 3/4" round size with recessed mount fits an 11/16" hole using the included grommet.
- Durable, No Bulbs to Replace: Polycarbonate lens and housing protect LEDs that last 50 times longer.
- DOT Compliant Safety: PC-rated beam gives 180° coverage for visibility from front and sides.
Features to know about
Brighter and More Efficient Lighting: 2-Diode LED Design
Traditional bulbs can burn out quickly and pull more power than you’d like. This 3/4" round Uni-Lite uses two red LEDs that shine brighter while drawing only 0.03 amps at 12.8 volts. The clear polycarbonate lens lets those LEDs throw clean, visible light without the heat or fragility of incandescent bulbs. You get the brightness you need with far less power demand and no filaments to fail.
Tight Fit Installs: Compact and Recessed Mounting
When space is limited, this light fits right in. At only 3/4" in diameter and 7/8" deep, it mounts flush using the included black PVC grommet. Just drill an 11/16" hole, push in the grommet, and snap the light into place for a snug fit that looks clean and stays put. The simple 2-wire pigtail makes wiring straightforward—one power lead, one ground—so installation takes just minutes.
Water Exposure and Harsh Conditions: Fully Sealed and Submersible
If your trailer ever sees water, this light is built to handle it. The housing and lens are sealed to make one waterproof unit that’s completely submersible. The circuit board inside is protected from moisture, keeping the diodes safe from corrosion or failure even after repeated dunking. It’s ready for wet roads, boat ramps, or any job where water is part of the routine.
Better Visibility from All Angles: PC-Rated Beam Spread
Visibility matters most when conditions aren’t ideal. This PC-rated light puts out a 180-degree beam pattern—90 degrees to either side of its centerline—so it can serve as both a clearance light and a side marker when mounted properly. That wide spread means it’s visible from the front and sides, keeping your trailer well lit so others can see you coming and going.
Built to Last: Durable Polycarbonate Construction
The lens and housing are made from tough polycarbonate that resists damage from impact or exposure. It’s a small light that holds up under big use, whether on the road or at the ramp. With LEDs rated to last up to 50 times longer than incandescent bulbs and backed by a lifetime warranty on the diodes, you can count on it to stay bright for years without needing replacements.
Specs
Dimensions
- Light dimensions: 3/4" diameter x 7/8" deep
- Grommet diameter: 11/16"
Electrical
- Power draw at 12.8 volts: 0.03 amps
Lighting
- Diodes: 2
- PC-rated light coverage: Produces a 90-degree angle of light to either side of its centerline for a total of 180 degrees of coverage.
Warranty
- Lifetime warranty on LEDs
MCL11CRKB Optronics Uni-Lite Mini LED Side Marker/Clearance Trailer Taillight with Grommet - PC Rated - Clear Lens with Red LEDs
Alternate part number: MCL-11CRKB
Video of Uni-Lite LED Clearance and Side Marker Light w Grommet - Submersible - 2 Diodes - Clear Lens - Red
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Video Transcript for Feature Review Uni-Lite LED Clearance and Side Marker Light w Grommet
Today we'll be reviewing part number MCL11CRKB. This is the mini LED side marker and clearance light. It's going to be a red light with a clear lens. This is from Optronics. This is going to serve two functions, again working as a side market and clearance light. It is PC rated, so it's going to produce a 90 degree angle of light, left and right, when mounted at a 45 degree angle.
It's got the long lasting, super bright LED's. They're going to be a great replacement for incandescent lights. The multi-diode design is going to optimize light output. You don't have to worry about replacing any bulbs and they're going to be a lot more efficient providing brighter light with less power. The lens is a crystal clear lens, impact resistant, polycarbonate material. It is going to be sealed so it's going to be waterproof.
So when it comes to the housing and the lens you have a sealed, waterproof design. It's also going to feature a two-wire design. You're going to have your black wire which is going to be the power lead. Then you're going to have the white wire which is going to be your ground wire. You can see that you have the ends exposed, but it is protected with a nice insulated covering. This is Department of Transportation compliant.
It also meets FMVSS108 requirements in any 360 degree position. It's going to be a round light. The dimensions are going to measure 3/4 of an inch in diameter. If we separate it from the grommet it's going to measure 15/16 of an inch in depth. So you can see there that, that grommet easily comes out that way you can and attach the grommet to the trailer or whatever application you're going to use to mount this to.
And then stick the light through and all you have to do is push it down in position for a nice snug, secure fit. It's going to have two diodes. The power draw is going to be 0.047 amps at 12 volts. The installation does require 11/16 of an inch hole at the desired mount location. The grommet is made from a PVC construction. We're going to go and hook it up to our external power source. We're going to connect our ground wire and then we'll connect our power wire. We'll go and turn off our overhead lights. Turn on our power source. You can see there that we have a nice bright red LED light. It's got the two LED bulbs in there you can see glowing. The clear lens allows for a lot of light to shine through and those LED's are very bright. That's going to do it for today's review of part number MCL11CRKB. This is the mini LED side marker and clearance light from Optronics. .
Customer Satisfaction Score:
100% were satisfied with this product
0% of customers were not satisfied
Ratings & Reviews
4.8
845 reviews
by:
Chris
10/02/2025
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.
by:
Walter
04/30/2026
2019
Jeep
Cherokee
These are really nice marker lights. Nice and bright.
by:
Joseph
12/29/2019
Great little running light puck! Very bright even in daylight.
by:
G Spencer
01/26/2019
Great lights that I used for the center brake lights on my Jeep. Fit was perfect and installation was easy. These lights are super bright. No complaints.
by:
Richard
01/28/2026
Item was similar to my OEM lights which made for any easy replacement.
by:
Billy M
06/04/2016
1999
Ford
F-250 and F-350 Super Duty
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!
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!
Billy M.
6/4/2017
Still bright and working great. Excellent product.
by:
Mr Bill.
12/01/2025
Installed these in the bumpers of my jeep and they have not failed me. Look great and are bright.
Nick S.
12/1/2025
That is great to hear! I am glad they are working well for you on your Jeep. Do you take that Jeep anywhere off roading?
by:
Khaaliso
08/16/2021
Lights are very bright and easy to install. Highly recommended!
Khaaliso
8/17/2022
Product is still performing as expected with no issues.
by:
Connor
02/01/2018
I installed these on my boat trailer to replace the existing lights that came on the trailer. These lights provide a much cleaner install into the crossbars and are much brighter. Install was very simple as well.
by:
Larry
03/31/2025
They worked just fine as indicator lights for gen and oil on my John Deere 2010
by:
Paul K.
05/30/2015
I recently came into a 12' popup trailer, and upon bringing it home I realized that the rear light plastic had decayed to the point where it was falling apart.
I found etrailer.com and fell in love with their well-made website, with it's massive lighting collection that was well curated and organized. It was clear to me that the people at etrailer.com are really passionate about trailer lighting! The videos of each product were awesome and really helped me figure out what I wanted to get. The lights came exactly as promised and were easy to install.
These lights, while small, are bright and easy to see, even in the daytime.
Will highly recommend!
I found etrailer.com and fell in love with their well-made website, with it's massive lighting collection that was well curated and organized. It was clear to me that the people at etrailer.com are really passionate about trailer lighting! The videos of each product were awesome and really helped me figure out what I wanted to get. The lights came exactly as promised and were easy to install.
These lights, while small, are bright and easy to see, even in the daytime.
Will highly recommend!
by:
BIGBLOCKBOB
11/11/2013
The lights themselves are fine. I've drilled the instructed hole size, (11/16"), and they won't go in. There's a fine line to keep from going too large with the hole. Also the lights were not marked as to color. I had to test them and mark them. I'm rebuilding a trailer and am using these on the outer front and rear fenders as marker lights. It will be a while before they are installed.
by:
Barry
05/16/2025
Great product fast shipping thank you
by:
Jason
05/18/2015
These are well built marker lights. That are small but supply a huge amount of light. I have been running them on my boat trailer for 3 yrs with no failure. Or any moisture problems in a submersible application. I recently installed them on the Jeep. ONLY MARKER I WILL RUN.
by:
Dave F
01/29/2017
Had to change my order. Talked with etrailer rep who quickly changed my order and refunded me the cost difference. Very professional and helpful customer service reps. Timely delivery of quality products. Thank you very much. I will definitely order from etrailer again! I will also recommend etrailer to my friends.
by:
Km
11/10/2015
Awesome marker lights, really like the size and shape and the fact that they are clear for my complete clear trailer light set up
by:
Greg
03/18/2022
These were a perfect match to the existing lights on my Sundowner horse trailer. etrailer had the right information to match these for placing my order.
by:
Brian W
01/21/2013
Just got the lights installed today in a set of fender flairs for the Jeep. Really nice product fit and quality. Even better was the Customer Serice from Etrailers along the way.
by:
Keith
02/02/2025
I used this light to drain power from a 200 amp-hour battery so that I could connect 3 together, had to draw to 1/10 a amp to connect all three together, took a long time, very little draw from the Led lamp.
by:
Dave F
01/29/2017
Perfect replacement part. Had to change my order. Was quickly handled by customer service. Thanks!!!!
by:
Jerry
03/01/2019
I have used these lights for years I’m building a all aluminum trailer when I’m finished with it I’ll send some pictures these lights are the best
by:
Collin
07/17/2016
These lights are very bright and so far I have not had any problems out of the couple hundred I bought. With a lifetime warranty light you can't go wrong with these.
by:
Bruce
06/29/2017
Exactly what I was looking for. Perfect replacements. Thanks etrailer.
by:
Mike
10/08/2017
2015
Ford
Expedition
Bought these for a winter project when the snow falls. I have purchased the yellow and red a few years back and thought I would give these a try. If they are like the last ones we bought, we will love them. Keep supplying great products for us to use. Thanks.
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Show More Reviews
See what our Experts say about this Optronics Trailer Lights
- Red and Amber Trailer Clearance Lights with Clear LensesYou are correct, clear lenses are not made for lights # MC32AB or # MC32RB. The bulbs for both of these lights produce white light so if clear lenses were on them the light would just be white. Unless you found colored bulbs that would fit. We do have red and amber marker/clearance lights with clear lenses though. For example we have # MCL63CAB which is an amber LED light with a clear lens. Other amber options include # MCL13CA2B, # MCL51CAK, # MCL65CAB, # AL91CAB, # MCL17CAB, # 00212336P,...
view full answer... - Installation and Details of Optronics Mini LED Lights # MCL11CRKBI contacted our representative at Optronics about the Mini LED Lights, part # MCL11CRKB. I have attached a side angle view of this light that our representative at Optronics sent. At this time we do not have installed pictures of the light or a video of the light. The lens cover sticks out slightly as you can see from the picture and the black ring is the grommet. To install, you will need to have an 11/16 inch hole drilled to insert the grommet. Then, the light pushes into the grommet...
view full answer...
- Can Uni-Lite LED Clearance and Side Marker Light be Used as Brake & Turn SignalYes, if you wanted to you could wire the Uni-Lite LED Clearance and Side Marker Light # MCL11CRKB to your trailer's brake and turn signal wiring. Obviously, a 3/4" diameter light shouldn't be your only brake/turn signal light but it can be wired that was as an added light. You'll also need Butt Connectors # DW05744-5.
view full answer...
Do you have a question about this Trailer Light?
Info for this part was:
Written by:
Tyler C
Expert Research:
Reno H
Video Edited:
Jacob T
Video by:
Kathleen M
Installed by:
Cole B
Updated by:
Amy B
Updated by:
Wilson B
Updated by:
Brian T
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Joseph J.
12/29/2020
Small but bright, still working great. Blend in well with the trailer in the daylight but stand out very bright at night