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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 etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (411)
  • Q & A (49)
  • Photos
  • Why etrailer?

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   (411 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.

- MC32RB

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.

- MC32RB

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

- MC32RB

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

- MC32RB

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. Thanks. G.

- MC32RB

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.

- MC32RB

Bought these to replace cracked lenses on our travel trailer, they're a perfect fit and well priced. A year after we bought and installed them, they're not showing any signs of deterioration.

- MC32RB

Just exactly what I needed to replace old sun aged lights and are priced just right thank you etrailer

- MC32RB

Exact replacement for the broken one on my trailer.

- MC32RB

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.

- MC32RB

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

- MC32RB

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.

- MC32RB

Works great... Easy installation.... Bought another as a back up....Thanks guys....

- MC32RB

Replaced the broken one perfectly. Fast shipment.

Still working just great!
Jaculyn - 06/18/2021

- MC32RB

Replaced cracked clearance lights on 2005 Weekend Warrior toybox. Some were half full of water! Was going to just replace shorted out bulbs, but was able to buy marker light, bulb and pigtail for less than the price of just a bulb from an auto store. Clearance lights a little different than, but actually better made than original equipment. Perfect fit! Also replaced one of the vent lids, one of mine had cracked in the intense SoCal sun. Great replacement directions, an easy job. Bought two, so have a spare. Thanks!

Still working well! Very happy with my purchase.
Jean B - 10/14/2016

- MC32RB

It works as it should and shipping was pretty quick. Would order again from retailer

- MC32RB

Works great, no problems.

- MC32RB

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.

- MC32RB

Excellent pricing on hard-to-find DIRECT replacement lights! NO modifications at all are required to replace your old faded or broken(yes,you know that happens once in a while!) marker lights. The screw holes matck perfectly for a painless 2 minute task because the socket fits from the old light. Thanks,etrailer!

Thank you for your attention to past customers such as me. I work at a large RV body shop and these lights sometime get damaged. The replacement lights are working VERY well for me. I am currently out of the lights and do ned to re-place an order for some. Etrailer IS the place to buy!
RV t - 02/20/2015

- MC32RB

Product description was accurate with fast delivery.

- MC32RB

fast shipping, excellent customer service, and great prices

- MC32RB

Installed today. Perfect replacement.

- MC32RB

The clearance lights seem to be very comparable to the OEM lights on our trailer. We haven't installed them yet so can not speak to their performance. I think the main reason for rating as average comes from their lack of any packaging. I don't like to send unnecessary packaging to the landfill, but it would be appropriate to wrap each light in perhaps a piece of newspaper quickly before shipping as a lot of 11 lights. Shipped loose in a box meant they arrived with some imperfections on the lenses.

- MC32RB

I ordered 7 lights for my trailer and was pleased with the lights and the quick delivery.

- MC32RB

great price, direct fit

- MC32RB

What can I say... these lights are "replacements" and not the OEM lights, but they are higher quality and better looking than the originals. Etrailer shipped them right out... they were shipped out the day I ordered them and on my doorstep 2 days later. When I took the originals off, I noticed they were in place by rivets, and I was nervous about drilling them out of my ABS trailer. However, it was no problem at all, and I'm so glad I took on this project. I replaced 11 lights and both brake lights, and it has given my 1996 trailer a much needed facelift. The old lights were tired, and the bases were black. The new lights have white bases and they they are MUCH brighter and more vibrant. The lenses fit snug. Oh, and the price was incredible. Great transaction.

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