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Optronics Trailer Clearance or Side Marker Light w/ Reflector - Incandescent - Square - Amber Lens

Optronics Trailer Clearance or Side Marker Light w/ Reflector - Incandescent - Square - Amber Lens

Item # MC36AB
Our Price: $5.42
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Trailer Lights
Shipping Weight: 0.1 lbs
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2-3/4" x 2-1/8". Incandescent trailer light serves as either a side marker light or clearance light when properly mounted. Built-in reflex reflector. Screw-on lens. Stud mount to trailer. 1-Wire design. P2 rated. (1) 194 bulb. Great Prices for the best trailer lights from Optronics. Optronics Trailer Clearance or Side Marker Light w/ Reflector - Incandescent - Square - Amber Lens part number MC36AB can be ordered online at or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - MC36AB

  • Clearance Lights
  • Rectangle
  • Incandescent Light
  • Amber
  • 2-3/4L x 2-1/16W Inch
  • Surface Mount
  • Rear Clearance
  • Side Marker
  • Non-Submersible Lights
  • Optronics

2-3/4" x 2-1/8". Incandescent trailer light serves as either a side marker light or clearance light when properly mounted. Built-in reflex reflector. Screw-on lens. Stud mount to trailer. 1-Wire design. P2 rated. (1) 194 bulb.


  • Incandescent trailer light functions as a clearance light or side marker light when properly mounted
  • Built-in reflex reflector removes the need for a separate reflector
  • Incandescent bulb can be easily replaced
  • Durable ABS housing with screw-on lens
  • Amber lens over incandescent bulb
  • Compatible with 12V DC systems
  • Stud mount to trailer
  • Single wire design grounds through mounting hardware
  • P2 rated


  • Dimensions: 2-3/4" wide x 2-1/8" tall x 1" thick
  • Bulb type: 194
  • Power draw at 12.8V: 0.2 amps
  • 3-Year warranty

Manufacturer Cross Reference
Light will work as an exact replacement for:
Uni Bond # MR2020A
Wesbar # 3101
Peterson # 114A

Optronics MC36 Series Marker Clearance Light Dimensions

P2-Rated Lights

Diagram of light spread for P2 rated light

A P2-rated light produces a 45-degree angle of light to either side of its centerline for a total of 90 degrees of coverage. This beam pattern can be seen straight on, but it cannot be seen clearly from the side. So this type of light can be used as either a side marker light or a clearance light, but it cannot function as both. If you need both functions, then you must install 2 separate lights on your trailer - one as a front or rear clearance light and one as a side marker light.

MC36AB Optronics Trailer Clearance or Side Marker Light w/ Reflex Reflector - Incandescent - Square - Amber Lens - P2 Rated

Alternate part number: MC-36AB

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Optronics Trailer Clearance or Side Marker Light w/ Reflector - Incandescent - Square - Amber Lens - MC36AB

Average Customer Rating:  4.9 out of 5 stars   (111 Customer Reviews)

2-3/4" x 2-1/8". Incandescent trailer light serves as either a side marker light or clearance light when properly mounted. Built-in reflex reflector. Screw-on lens. Stud mount to trailer. 1-Wire design. P2 rated. (1) 194 bulb.


The only lights that will fit on our trailer. Glad you have them in stock!



After a year, they are still working - just wish people would quit running into them with their tractor tires!


Lights were shipped quickly. They were just as described on website. Paula T was very helpful with my purchase.


Decent quality for the price. Still works fine a year later.


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.


I had a damaged side marker light on my trailer. Went to 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

Stefan H.


Working out great


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!



Been a year...still working great! Very happy with this.


This was an exact replacement size and installatio 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.


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.


Great fit & excellent service. Works flawlessly.


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.



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.


Matched a 15 year old trailer light that got smashed. Threaded stud on back, just turn assembly in to mount and wire up.


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.


Fast delivery and quality product


Outstanding ServicePurchased 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 was outstanding. I ordered the lights on Sunday night and received the shipment on Wednesday afternoon. I would definitely purchase from again.


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!!


The part was exactly what I needed. Part was not damaged during shipping.



I purchased a lens cover for a light on our trailer. Works great!


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!


Had the trailer re-wired with the new lights. Works great!


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.


The Side Marker Light with Reflector - Amber- MC36AB was exactly what I needed and arrived exactly when needed. Thank you. Perfect!


They work. Used to replace broken side lights on old equipment trailer.


Nice fit and it was a great replacement for a broken fixture on my trailer. Incredibly fast and accurate shipping and service. Thank you.


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.


Everything arrived promptly just as I had been informed and in great condition. Have had great experience with etrailer oN multiple occasions and will continue to look to you for your exceptional customer support in the future. Thanks agaiN for your help!


I have not had an opportunity to install these lights. My trailer is stored at a lot a few miles away. They appear to look very similar to the original set, so installation and functionality should be good. Thanks for your help.

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • How To Wire Clearance or Side Marker Light With Single Wire
    In 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...
  • What Are the Measurements of Optronics Replacement Amber Lens # A36AB
    The 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...
    Image 1 for
  • Single Wire Amber LED Clearance or Side Marker Trailer Light
    We 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...
  • Exact Replacement For Peterson 114 Clearance Lights
    The "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...
  • Replacement Incandescent Side Marker Light for Trailer
    I 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 Kit
    It 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...
  • One Wire Clearance and Side Marker Light Options to Replace Lights on Horton Hauler Trailer
    We 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...
  • Installing Optronics Marker Light MC36AB on a 6 by 10 Foot Utility Trailer
    Installing 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...
  • Wire Gauge of 25 Foot Harness Included with Submersible, Under 80 Inch Tail Light Kit
    Optronics 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...

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