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Optronics Trailer Clearance or Side Marker Light w/ Reflector - Incandescent - Square - Amber Lens
(4189 reviews)
Price: $6.62
In Stock
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Optronics Trailer Clearance or Side Marker Light w/ Reflector - Incandescent - Square - Amber Lens
Part Number: MC36AB
In Stock
$6.62
Retail:$9.25
You Save: 28%
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- All Info
- Reviews (4189)
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Optronics Trailer Lights - MC36AB
Highlights
- Simple One-Wire Hookup: Grounds through the mounting hardware for quick, clean installs.
- Two Lights in One: Works as a clearance or side marker light when properly mounted.
- Built-In Reflector: Reflex reflector eliminates the need for a separate reflector piece.
- Exact OEM Match: Replaces Uni Bond #MR2020A, Wesbar #3101, and Peterson #114A.
- Durable Build: Tough ABS housing with a screw-on lens stands up to road use.
- Low Power Draw: Uses 0.2 amps at 12.8 V for reliable lighting efficiency.
Features to know about
Simple, Reliable Visibility: Incandescent Marker and Clearance Light
When you just need a light that works and installs without fuss, this one gets the job done. Measuring 2-3/4" wide by 2-1/8" tall and 1" thick, it’s a compact incandescent light that functions as either a clearance light or side marker light when mounted properly. The built-in reflex reflector means you don’t have to add a separate one to meet visibility needs. It uses a single 194 bulb that can be easily replaced whenever needed, keeping things simple and practical.
Straightforward Wiring: Single-Wire Design with Stud Mount
No complicated wiring here—this light uses a single wire for power and grounds through the mounting hardware. That makes installation quick, especially for replacements on existing setups. The stud mount setup keeps it secure and easy to attach, saving time when swapping out older lights or adding new ones.
Durable and Serviceable: Screw-On Lens and ABS Housing
Built with a tough ABS housing and screw-on lens, this light holds up well to regular use without cracking or fogging easily. The screw-on design also makes bulb changes straightforward—no sealed unit to throw away, just open it up and replace the 194 bulb. Simple construction that’s built to last through years of use.
Meets Visibility Standards: P2-Rated Light Pattern
This P2-rated light throws a 45-degree beam to each side of its centerline for a total of 90 degrees of coverage. It’s designed to be seen straight on but not from extreme side angles, which makes it perfect for use as either a clearance light or side marker light—but not both at once. If you need both functions, just pair two lights for full coverage and compliance.
Exact Fit Replacement: Matches Common OEM Models
If you’re replacing an old fixture, this one lines up perfectly with several common lights. It works as an exact replacement for Uni Bond #MR2020A, Wesbar #3101, and Peterson #114A models. With the same size and matching bolt pattern, it fits right in without drilling new holes or running extra wires.
Specs
Dimensions
- Overall dimensions: 2-3/4" wide x 2-1/8" tall x 1" thick
Electrical
- Bulb type: 194
- Power draw at 12.8V: 0.2 amps
Warranty
- Warranty: 3-Year warranty
MC36AB Optronics Trailer Clearance or Side Marker Light w/ Reflex Reflector - Incandescent - Square - Amber Lens - P2 Rated
Alternate part number: MC-36AB
Customer Satisfaction Score:
100% were satisfied with this product
0% of customers were not satisfied
Ratings & Reviews
4.9
4189 reviews
by:
Jay
04/22/2026
Excellent customer service abd quick delivery. Wish all companies operated like yall!
by:
Mark
06/05/2018
I’m never sure when I order things online that I’m going to get what I wanted. I’m surprised and pleased that they fit the lights on my trailer just like the original ones. Now I know where I can get parts that I can count on.
by:
Daniel
11/11/2019
Appear to be of excellent design and quality. This was a direct drop-in replacement for an existing light that got smashed in an accident. The one-wire hookup is really nice (grounds through the mount). Just make sure you have decently clean metal where the washer/nut clamp down. Can't comment on long-term durability, but based on initial impression and short term use, it seems that it will stand the test of time!
by:
Stefan H
01/02/2017
I had a damaged side marker light on my trailer. Went to etrailer.com and found exactly what I was looking for in less than a minute.
The ordering process was quick and easy, and parts were delivered quickly. Just got done replacing the lights without any issues and everything works great.
I would definitely recommend etrailer.com.
The ordering process was quick and easy, and parts were delivered quickly. Just got done replacing the lights without any issues and everything works great.
I would definitely recommend etrailer.com.
Stefan H.
1/2/2018
Working out great
by:
Adam
06/20/2019
I haven't used the lights yet but you can't go wrong for the price. Etrailer is an asset to the online shopping community. No complaints here.
Adam
6/21/2020
I bought 10 or 12 of these. I have no complaints about any of them that I put on any of the trailers that I am responsible for taking care of.
by:
Steve
06/28/2025
The price was right and the sales person picked the right style for that sh*t trailer I was impressed
by:
Art D.
05/29/2011
wise. Wish the description had indicated that it included the bulb as well as I ordered two lamps that I will probably never use. As it shows, there was a small section of wiring for a connection that was different from the plug in connection on my original light that made the installation slightly longer as I had to find a couple of crimp connectors to make the connection. Otherwise great replacement.
by:
Robert
10/19/2018
Inexpensive replacement for Peterson. Not quite identical in that the mounting bolt is slightly different but this makes no difference. Metric instead of SAE. I had no problem mounting it. My only problem was the post office and not etrailer. I got excellent service from etrailer, quick response to my emails. Great price. eTrailer is a company that understands how to give service with the sale. No, I am not an employee or getting a discount.
by:
Maurreen
06/15/2021
The part was exactly what I needed. Part was not damaged during shipping.
Maurreen
6/16/2022
I purchased a lens cover for a light on our trailer. Works great!
by:
Caryl
11/03/2020
Exactly what I needed! Fast shipping and I would recommend them.
Caryl
11/4/2021
Still working, no problems!
by:
TP
05/18/2021
Matched a 15 year old trailer light that got smashed. Threaded stud on back, just turn assembly in to mount and wire up.
by:
Smith, B - Florida
07/24/2017
Received the order as promised and although I sold the tow dolly before I received them or had a chance to use them they look of great quality and I'll no doubt use them in the future.
I really like etrailer and thj information they provide.
Thank you!
I really like etrailer and thj information they provide.
Thank you!
by:
Bret
04/06/2020
I was looking for replacement lights for a used jetski trailer i bought.
I found exact replacement LED's.
The email updates were extremely nice and the shipping was super fast.
I will be ordering again from this company.
I found exact replacement LED's.
The email updates were extremely nice and the shipping was super fast.
I will be ordering again from this company.
by:
Brion H.
01/05/2011
Purchased two side marker lights and a triple tail light for a utility/atv trailer. The price was outstanding for all three products and the service from etrailer.com was outstanding. I ordered the lights on Sunday night and received the shipment on Wednesday afternoon. I would definitely purchase from etrailer.com again.
by:
Tom
10/16/2018
This side marker light was an exact match to the one that had been damaged on my 16 ft. California trailer, for a great price, and fare shipping!!
by:
Fredrick
03/10/2018
Replacement clearance light for my snowmobile trailer...exactly what I wanted. The eTrailer website was very helpful with great photo's and descriptions. Very easy to order. Thank you.
by:
Michael
06/09/2021
They work. Used to replace broken side lights on old equipment trailer.
by:
Ross
09/20/2015
Thank's George for the 5-star service ! The exact replacement I was looking for ! I will recommend you to everyone that needs great service' parts and prices ! Thank's Again ! Ross
by:
Jeff
09/07/2025
Quick and easy to work with, on or off the web
by:
Bruce
11/02/2022
The only lights that will fit on our trailer. Glad you have them in stock!
Bruce
11/11/2023
After a year, they are still working - just wish people would quit running into them with their tractor tires!
by:
Arthur
09/16/2015
Nice fit and it was a great replacement for a broken fixture on my trailer. Incredibly fast and accurate shipping and service. Thank you.
by:
Kathleen
08/21/2018
The Side Marker Light with Reflector - Amber- MC36AB was exactly what I needed and arrived exactly when needed. Thank you. Perfect!
by:
Rich U
08/12/2016
Had the trailer re-wired with the new lights. Works great!
by:
E Paul
11/28/2020
The Product was as Advertised. It was just what I needed for my Flatbed Trailer.
The service on this order was GREAT. Thank You!
Great Follow-up and informative.
The service on this order was GREAT. Thank You!
Great Follow-up and informative.
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See what our Experts say about this Optronics Trailer Lights
- How To Wire Clearance or Side Marker Light With Single WireIn regards to wiring a clearance or side marker light with one wire like the Optronics Trailer Clearance or Side Marker Light part # MC36AB, the wire will be for power. Therefore, you will need to attach this to the power wire on the trailer that the light will be replacing, running your own either inline with an existing clearance or side marker light or to the junction box. If there are wires present, the power will likely be brown but if not you will need to test. The light will then...
view full answer... - One Wire Clearance and Side Marker Light Options to Replace Lights on Horton Hauler TrailerWe have quite a few different options for trailer clearance lights with one wire and that will ground through the mounting hardware. These lights come in various sizes and shapes. The best replacement for your trailer will depend on the size light you are wanting to replace. For a small LED clearance light that is a stud-mount, you can use the Optronics Sealed Mini Rectangular LED Stud Mount Trailer Clearance Light. For an amber light you will want # MCL95AB and for a red light # MCL95RB....
view full answer... - Exact Replacement For Peterson 114 Clearance LightsThe "A" in the Peterson 114A stands for amber, just like the "R" in 114R stands for red. We do carry the exact Peterson 114A lights, part # 423200, as well as the red Peterson 114R, part # 423400. These each measure 2-3/4" x 2-1/8" just like the # MC36AB you referenced. Any of these will work as exact replacements, and each of the replacement lights do come with a bulb.
view full answer... - Installing Optronics Marker Light MC36AB on a 6 by 10 Foot Utility TrailerInstalling the amber, stud mount marker light # MC36AB from the Optronics trailer light kit # TL29BK will be pretty easy. On your 6x10 trailer, you will find the location you want to mount the light and drill a hole followed by another hole a 1/2 inch below the first hole you drill. Take the wire from the marker light # MC36AB and run it through the lower hole. Run the stud on the light through the second hole on top. Using a lock washer and nut to secure it to the frame. The wire from...
view full answer... - What Are the Measurements of Optronics Replacement Amber Lens # A36ABThe Optronics Replacement Amber Trailer Light Lens # A36AB that you referenced measures 2-3/4-inches by 2-inches overall. These and several other measurements are indicated on the attached photo. The lens is 1/4-inch thick at the two mounting points; it is concave at the back except for the two mounting hole positions. This lens is intended as a replacement for the original lens on Optronics Side Marker Light # MC36AB. For referenced I have included a link to our page for all rectangular...
view full answer...
- Single Wire Amber LED Clearance or Side Marker Trailer LightWe have exactly what you are looking for with the Peterson LED Trailer Clearance or Side Marker Light # M215A. This is a single-wire design that grounds through its mounting hardware. This light has a built-in reflector and is made in the USA. I have added a link to a video review of the light for you to check out as well.
view full answer... - Wire Gauge of 25 Foot Harness Included with Submersible, Under 80 Inch Tail Light KitOptronics uses small 20 gauge wiring for their 4-Way wiring harnesses so it would be even smaller than 18. In order to get 14 gauge wires I recommend # DW04923-1 which is sold by the foot. Each of the wires in it are 14 gauge. Then you would just need the lights, # ST6RB and # ST7RB, 2 of # MC36AB, and license plate bracket # LP10SB. And for the additional clips, connectors, ties and other parts I recommend the wiring kit # HM51020.
view full answer... - Replacement Incandescent Side Marker Light for TrailerI can help you find a light that will work for you. We do offer a non-led version # MC36AB of the light you referred to # MCL36AB. We also offer the replacement bulb for the incandescent marker light # A194B.
view full answer... - Which Part Numbers Are the Clearance Lights In the TL5RK Trailer Light KitIt sounds like you're looking for the clearance lights that came in the Submersible, Under 80" Trailer Light Kit with 25' Wiring Harness # TL5RK. Those are available with part # MC36AB (incandescent) or # MCL36AB (LED).
view full answer...
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Daniel
11/12/2020
Been a year...still working great! Very happy with this.