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Square Trailer Clearance, Side Marker Light with Reflector - Red

Square Trailer Clearance, Side Marker Light with Reflector - Red

Item # MC36RB
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Shipping Weight: 0.09 lbs
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2-3/4" L x 2-1/8" W x 1" D; Reflectorized lens; corrosion resistant; replaceable lens and bulb; mount on stud; 1-wire; 1-bulb incandescent Lowest Prices for the best trailer lights from Optronics. Square Trailer Clearance, Side Marker Light with Reflector - Red part number MC36RB can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (38)
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  • Videos (1)
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  • Why etrailer?

Optronics Trailer Lights - MC36RB

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

2-3/4" L x 2-1/8" W x 1" D; Reflectorized lens; corrosion resistant; replaceable lens and bulb; mount on stud; 1-wire; 1-bulb incandescent

Square Trailer Clearance and Side Marker Light with Reflector - Red

This square light can be used as a clearance or side marker light. The red lens is reflectorized, meaning that a separate reflector is not needed for DOT compliance. The light measures 2-3/4" long x 2-1/8" wide x 1" deep. The molded plastic housing and durable lens provide all-weather protection against corrosion. The light features a replaceable, screw-down lens and easy-to-replace bulb. The light contains a single lead wire for power and is grounded through the mounting stud.

  • Red, square light functions as clearance, side marker light
  • Reflectorized lens is DOT compliant, eliminating need for separate reflector
  • Weather and corrosion resistant
  • Single-wire design grounds through the mounting stud
  • Dimensions: 2-3/4" L x 2-1/8" W x 1" D
  • Replaceable lens and bulb

Manufacturer Cross Reference
Light will work as an exact replacement for:
Uni Bond # MR2020R
Wesbar # 3103
Peterson # 114R

Manufacturer Specifications

Square clearance or side marker light with a reflectorized lens, eliminating the need for a separate reflector to meet DOT requirements. Single-wire design grounds through mounting stud. Features replaceable lens and easy to change replaceable bulb. All-weather, molded plastic housing and durable lens to protect against corrosion.

dimensions of light

MC36RB Red Square Reflector Marker, Clearance Light by Optronics, Inc.

Alternate part number: MC-36RB

California residents: click here

Video of Square Trailer Clearance, Side Marker Light with Reflector - Red

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 - MC36RB Review

Today we are going to take a look at Optronics square trailer clearance and side marker light, part number MC36RB. The lens on this light is reflectorized to DOT standards. Both the bulb and the lens are replaceable. It is a single wire system meaning you will have one wire for your power connection and your ground connection will actually come through the mounting stud or the mounting hardware. Next we will hook the light up to the power supply so you can see how it looks. We will take our ground and clip it to the mounting stud at the back and we will clip our power to our wire lead. Next we will turn off the overhead lights so you can see how bright the light is. And that does it for Optronics square trailer clearance light, part number MC36RB.

Customer Reviews

Square Trailer Clearance, Side Marker Light with Reflector - Red - MC36RB

Average Customer Rating:  4.9 out of 5 stars   (38 Customer Reviews)

2-3/4" L x 2-1/8" W x 1" D; Reflectorized lens; corrosion resistant; replaceable lens and bulb; mount on stud; 1-wire; 1-bulb incandescent


Product was exactly as described and replaced broken one perfectly. Item was shipped and received in very good time.I would recommend this company (E-trailer ) for any of your trailer lights you may be looking to buy!Thank you for a great product and great service! Thank You


Easy ordering! Fast shipping! Product as described! Would definitely buy from etrailer again!


Exactly as displayed. Neatly packaged. Price is lower than stores yet better quality. Delivered earlier than expected. I Used 6 (3 on each side) to make brake and tail lights for my trailer. Our forklift drivers kept breaking the bulky, hanging from the side of trailer, regular taillights purchased at retailers which used to cause so many problems. This practically eliminated the problem. Lights cant get caught where they are at and are almost flush to the trailer.


The red ones are really hard to find..... very reasonably priced, super fast shipping. Website easy to use/simple to order. Excellent customer service. EVERY product I have ordered from these people has 110% quality and exactly as described ant see the red ones on the back in the picture,sorry.


I got the exact replacement lights I needed for my trailer. Arrived on time. Good customer service!


Great lights at a great price. Actually I should have ordered the amber lights for the front corner of my trailer instead. However, I went ahead an ordered the whole trailer light kit anyway and use these red lights for the middle of the trailer since it's a long trailer. The lights themselves are well constructed and water tight. They are very visible at night and even have a built in reflector. Mounting was easy with one bolt to attach to the trailer so it makes it easy to replace if needed. As always, very satisfied with etrailer since I have been doing business with them for many years and always get high quality parts at a competitive price. I will share my photo when all my lights are installed.


Factory replacement on my Kauffman open trailer. Easy install and work as expected.


Great product description, quick delivery, installed shortly after delivered. Large select of products and will use again on my next project. Thxs


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.


Clearance lights look and work great they added the extra touch I wanted for my trailer

Lights still working great
To m - 08/25/2018


Very happy with the tail light covers I received. They were the right fit and arrived quickly. Would buy again from etrailer anytime.


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!


Great store to deal with. My order was shipped immediately and lots of Email sent from order to shipping information. Order was shipped the same day it was received. I will be back to order my new tires and wheels at some point this year.


perfect replacement for oem lights on trailer at a much better price


Very happy with the trailer light bought from eTrailer, fast shipment and great product!


Just what I needed and look good. Thanks


The marker lights were exactly what I was looking for. The shipping was prompt and everything arrived in excellent condition.


The purchase was what I expected, it was well packed and delivered very quickly. I would order from again.


Seems to be a nice unit. Shipping was slower than expected with no tracking info available. May have been a USPS issue as far as time in as much package stamped "damaged when received".

Well actually I sold the trailer that I originally bought them for. But I had ordered extra and they will fit new trailer just fine. A very nice product for the price.
Jay S - 02/20/2015


Exactly what I needed, and will need again, and again.....for my boat trailer (which apparently has a "hit me" sign on it)


These lights are nice for the money , They fit my trailer perfectly. And I received them in very good time , Packaging was very good also.


Great product. They still look new and have not degraded after being in the elements for nearly a year.


Quick shipping and the lights look great. Haven't installed yet.

Thanks for your help.


Good quality. Stud mount which saved me from running a ground wire.


Just what I was looking for.

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