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Optronics Trailer Clearance or Side Marker Light w/ Reflector - Incandescent - White Base - Red Lens

Optronics Trailer Clearance or Side Marker Light w/ Reflector - Incandescent - White Base - Red Lens

Item # MC32RB
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Shipping Weight: 0.11 lbs
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4" x 2" Rectangle. Incandescent trailer light serves as either a side marker light or a clearance light. Built-in reflector. Durable white ABS base. Twist-in bulb socket. Surface mount - hardware not included. 2-Wire design. P2 rated. Lowest Prices for the best trailer lights from Optronics. Optronics Trailer Clearance or Side Marker Light w/ Reflector - Incandescent - White Base - Red Lens part number MC32RB can be ordered online at or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - MC32RB

  • Clearance Lights
  • Rectangle
  • Incandescent Light
  • Red
  • 4L x 2W Inch
  • Surface Mount
  • Rear Clearance
  • Side Marker
  • Non-Submersible Lights
  • Optronics

4" x 2" Rectangle. Incandescent trailer light serves as either a side marker light or a clearance light. Built-in reflector. Durable white ABS base. Twist-in bulb socket. Surface mount - hardware not included. 2-Wire design. P2 rated.


  • Incandescent trailer light functions as either a side marker or clearance light when properly mounted
  • Built-in reflex reflector removes the need for a separate reflector
  • Incandescent bulb can be easily replaced
  • Durable white ABS plastic base
  • Red snap-on lens over incandescent bulb
  • Compatible with 12V DC electrical systems
  • Surface mount on trailer - hardware not included
    • Twist-in socket secures bulb in place
  • 2-Wire design with power lead and ground wire
  • DOT compliant
  • P2 rated


  • Dimensions: 4" long x 2" tall x 1" deep
  • Distance between mounting holes (center on center): 3"
  • 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:
Peterson # TW2549R

Optronics MC32 Series Incandescent 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.

MC32RB Optronics Trailer Clearance or Side Marker Light w/ Reflector - Incandescent - Rectangle - White Base - Red Lens - P2 Rated

Alternate part number: MC-32RB

California residents: click here

Customer Reviews

Optronics Trailer Clearance or Side Marker Light w/ Reflector - Incandescent - White Base - Red Lens - MC32RB

Average Customer Rating:  4.8 out of 5 stars   (444 Customer Reviews)

4" x 2" Rectangle. Incandescent trailer light serves as either a side marker light or a clearance light. Built-in reflector. Durable white ABS base. Twist-in bulb socket. Surface mount - hardware not included. 2-Wire design. P2 rated.


These are described as incandescent, but what I received are LED.
Due to the wiring on my older RV, LED will not work without a wiring change, which I am unable to do at this time. Please send me the incandescent marker lights.

Let me get this taken care of for you. I have sent this over to our customer service department and they will be assisting you in getting the correct lights shipped out to you as soon as possible.
-- Etrailer Expert Katrina B - 08/08/2022


I was extremely pleased with my order and, especially so with Amy in Customer Service. It is unfortunate that through no fault of etrailer, I am having to return the order as the lens coverings don't fit my base. Will, in Cust Service has made the return seamless. Can't say enough about eTrailer and, should I require more parts, I won't hesitate to order from them.


Always GREAT service and products from etrailer. Luckily, I've had no problems with ALL my equipment in the last year. I know where I'll go when I need anything. Thanks for all you do.

Perfect. Exact replacement for one that was broken.
Kathryn - 07/25/2022


I like the product, was easy to install and all leds worked perfectly. The price was great I bought stainless screws to hold it on and they cost as much. Delivery was quick and ordering was a snap. Will continue to do business with etrailer.


It works as designed. I had to use a black marker on the white edge to make it match the other marker lights on my trailer.


It was a long wait to receive them. They were exactly what I needed and easy to install.

The lights were the right ones and are working great! And were so easy to replace, even for this girl to do alone.
Claudia - 08/20/2022


This is a very nice looking and well made light. I needed to modify the two wire configuration to a single wire as I could not run a ground wire. It was a simple modification. I have included a series of pictures to illustrate. I am very happy with the price and quality.


Exactly what I ordered and delivered very fast.Great company to business with.


These lights are really good for the price! (I ordered 16)
They aren't cheap feeling or flimsy.
They feel sturdy, durable and they look quality.
The wires are the correct gauge and the light bulb is in a rubber grommet for weather sealing.
The light is sealed very well and it takes some effort to remove the lens cover.
The lens is thick and the color is true. The reflector is bright.
I was genuinely impressed with lights especially for the cost.
These will be replacing older side marker and clearance lights on my older 1985 Sunstream motor home.
My lights are faded, some broken, mostly leaking and more costly to replace than what they are worth.
These MC32RB and the Amber version lights will look great!
Slightly different style, same size and better looking and better quality than the originals.
Very happy with lights and etrailer.
Will be ordering more items.


Works great, no problems.

William - 08/28/2022


Husband cracked the one we had. Purchased this one for the red light cover. Fits like a glove. Won’t be getting a ticket now.


My camper needed replacement lenses for Kaper II IA-S-20 clearance lights. I couldn't find them, so tried etrailer Optronics MC32RB. They fit fine as replacement lens. Since I also needed several number 194 bulbs, I bought the complete unit for only about 60 cents more, and got bulbs with. This lens also will work on Bargman Clearance Light #59, which I had on a different RV. All seem interchangable.


I purchased red and amber lights to replace the faded and broken ones on my travel trailer. Camping World wasn't able to help me. Found you all while searching the internet. Great produce. Great price. Better than the originals. The screws that secure the lights to the trailer are protected from the weather (they are under the removable lens. Easy to install. Ended up replacing all eleven lights.


Interesting. I knocked the light of my RV and at the time thought it would be very difficult to replace. Fortunately I googled the part no on the item which led me to your site and it appears to be exactly the right light.


Great side marker lights, haven't burned out and the lens has stayed put in the past year.


This is a standard size clearance light. It should work for most customers. It was a replacement for a light that just had two wires coming out the back. This product has a gromet that extends out the back. It did not fit my entry hole. I modified the geometry to make work.


Fits perfect coachman clipper


This product was an exact replacement for the o e installed on my RV. Installation was a snap!

The light is still working well and has not faded or cracked. Very happy with it.
Wayne C - 07/12/2020


good light shipped fast

they were a direct fit and are still working and look great
Mike - 05/09/2022


Easy purchase, good product!!


I highly recommend this product if you need to replace a broken light housing or cover. You won't be disappointed.


Replacement lights were exactly what I'd expected, and matched the quality and design of the original lights. Very happy with material and performance. Thanks!


These lights came on a trailer from factory that I purchased from another individual. A few of the LEDS on one side of one of the brake lights quit working. When looking up the lights to see where to order them, I saw the life time guarantee. I thought that there surely was a catch, but they honored the warranty and made me a customer for life. You cannot beat a company with a quality product plus excellent customer service. I am a customer for life.

ExcellentA Made in the USA product by a company that goes above and beyond in customer service. We now use only Optronics on everything.
Ben E - 09/23/2020


Great product, great price, fast shipping! It doesn't get any better, and I buy a lot of stuff on the web. I don't usually write reviews but these guys are so good I had to put in a good word.
Highly recommended!


Good stuff

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