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When an old light cracks or burns out, this one makes replacement simple. The Optronics Mini Trailer Clearance or Side Marker Light measures 3-3/16" long by 1" tall and mounts flush with the surface using the included hardware. The single-wire design grounds through the mounting hardware, making wiring straightforward and clean.
Good lighting matters for safety, and this light does the job well. It uses a replaceable 194 incandescent bulb behind a red snap-on lens to give steady illumination on a 12V DC system. As a P2-rated light, it provides a 45-degree beam angle on either side of center for a total of 90 degrees of coverage—perfect for use as either a clearance or side marker light when properly mounted.
Road grime and vibration can wear down weaker parts, but this one holds up thanks to its durable ABS construction. The housing keeps the bulb protected while staying compact at just 1-1/8" thick. Snap the lens in place and you’re ready to go; no special tools or sealants needed.
Each light draws only 0.4 amps at 12.8V, so even with multiple units wired together, the total load stays reasonable for a standard running light circuit. That means reliable brightness without overloading your system.
If you’re replacing older lights from other brands, this one matches several common part numbers—Uni Bond #ML1020R, Truck Lite #26306R, Grote #46882, Peterson #107WR, and Bargman #40-39-001—so you can swap it in knowing the size and mounting holes (2-3/4" center to center) will line up right where they should.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we are going to take a look at the Optronics Mini Trailer Clearance and Side Marker Light, red in color part number MC11RB. This is a single wire design; the ground will make contact through the mounting bracket. It surface mounts on 3 inch centers. It has a replaceable lens and bulb. Lets go ahead and hook up a power supply so you can see what it looks like when it is lit up.
We will hook our ground up through the middle tab in the mounting bracket, and our power supply to our single wire design. Lets go ahead and turn off the lights so you can see what it looks like in the dark. And there you have it for Optronics Mini Trailer Clearance and Side Marker Light, part number MC11RB.
Customer Satisfaction Score:
100% were satisfied with this product
0% of customers were not satisfied
Ratings & Reviews
Got exactly what I needed right when I needed it!
Great service!!!!
Turned out it wasn't what I wantded but it. Was what I ordered and the service was good
I am happy with the product. Would purchase from you again.
these guys got it figured out. always lots of parts and good service.
charles dumont
I am very pleased with your company and the way the order was processed. I would definitely recommend your company to my friends.
Better than online! Customer service is excellent and orders are fast. They have everything I need.
i received your product. i have already have them mounted, they show up good in day and night time. i would recommend them to any one that looking for a way to light up your trailer for safety.
They didnt handle up so well in the cold the wires got could and broke off
Product was exact replacement. Ordering was very easy, the website is easy to navigate and the price was reasonable. Highly recommend.
Just what I was looking for
These clearance lights are exactly what I needed and they arrived in record time after I ordered them and are of great quality at a low price !
Have purchased from etrailer before
and will again. As usual, great product, service, and fast shipping.
Found the lights I was looking for at etrailer. Other sites did not have the ones I needed. Fast delivery. Email confirmation from a person at etrailer after ordering online. Email follow up after delivery. Best place to order trailer lights.
Pretty good, easy to install and works. Used these on my car hauler for safety markers at the rear. Do just fine and inexpensive.
good product. hard to find the older style incandescent clearance lights anymore since almost everyone is going led now. plan on replacing some non working clearance lights on my trailer.
Oddly enough I was having a hard time finding these specific clearance lights for the trailer of my bass boat. Was happy to find them here, with a fair price, and quickly shipped. Emails to let me know of every update. This was my first experience with etrailer, but I suspect it will not be my last.
product was an exact replacement for my trailer marker light. I also purchased the 3 light marker bar, which was also an exact replacement of the one used by the manufacture. etrailer made it easy to locate and the items arrived in a timely manner.
It’s is an exact replacement for my 2012 boat trailer. What is a constant is the great customer service and support that E trailer provides.
They all worked after i installed them , all 5 across the back of my trailer . I also bought led turn/stop lights and they work just fine better than the old loose bulb type. I also repainted my trailer.
Nathan M.
9/4/2021
Great all lights need no repair
purchased this item as a replacement to match the existing marker lights on my trailer and they matched perfectly. ordering was quick and easy and shipping was fast. not my first purchase from this vendor, will continue to purchase items as needed
Mike S.
9/15/2017
after a year the marker lights are still working, no issues
Already reviewed this for the amber color lights. Same comments apply. They fit, they work, and I ordered some extra bulbs and red and amber side marker lights in case some more break in the future. I will be ready.
Charles P.
9/11/2015
Theyre still on the utility trailer that I installed them on, working fine, and I am satisfied with the quality and function of the lights.
Much easier than other types of marker lights because of the fact there is no ground wire, just power. It made the installation process so much quicker. Great product.
Ftfj
2/23/2025
Given as a refreshment gift for my elderly uncle’s trailer, it has mostly remained unused throughout the year, except for one instance when a tree branch was removed after a storm. The lights have kept their original appearance, and while the old trailer still sits dormant, the yard looks only slightly cluttered—helped by these affordable lights. Overall, a great product for the price!
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Dave B.
4/11/2015
After a year they are still working. Good quality for the price. Best price is at Etrailer.