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Peterson Clearance or Side Marker Trailer Light w/ Reflector - Incandescent - Oblong - Red Lens

Peterson Clearance or Side Marker Trailer Light w/ Reflector - Incandescent - Oblong - Red Lens

Item # 423000
Our Price: $3.47
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Shipping Weight: 0.11 lbs
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Trailer Lights 423000 - Red - Peterson
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4-1/16" x 2-1/16" Oblong. Incandescent trailer ligth serves as a clearance or side marker light. Built-in reflex reflecor. Durable molded plastic base. Surface mount - hardware not included. 1-Wire design. P2 rated. (1) 194 bulb. Great Prices for the best trailer lights from Peterson. Peterson Clearance or Side Marker Trailer Light w/ Reflector - Incandescent - Oblong - Red Lens part number 423000 can be ordered online at or call 1-636-306-4830 for expert service.
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  • Reviews (66)
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Peterson Trailer Lights - 423000

  • Clearance Lights
  • Oval
  • Incandescent Light
  • Red
  • 4L x 2W Inch
  • Surface Mount
  • Rear Clearance
  • Non-Submersible Lights
  • Peterson

4-1/16" x 2-1/16" Oblong. Incandescent trailer ligth serves as a clearance or side marker light. Built-in reflex reflecor. Durable molded plastic base. Surface mount - hardware not included. 1-Wire design. P2 rated. (1) 194 bulb.


  • Incandescent trailer light functions as a clearance or side marker light when properly mounted
  • Built-in reflex reflector removes the need for a separate reflector
  • Custom-cut lens optics for increased light output
  • Premium bulb provides up to 15,000 hours of light
  • Durable molded plastic base
  • Red lens over incandescent bulb
  • Compatible with 12V DC systems
  • Surface mount to trailer - hardware not included
  • Single wire design grounds through mounting hardware
  • DOT compliant
  • P2 rated


  • Light dimensions: 4-1/16" long x 2-1/16" tall x 1" thick
  • Distance between mounting holes (center on center): 3"
  • Bulb type: 194/193
  • Power draw at 12V: 0.25 amps
  • 1-Year limited warranty

Manufacturer Cross Reference

Light will work as an exact replacement for:

Grote # 46712

Optronics # MC38RB

Peterson 108WR Clearance Marker Light w/ Reflex Reflector 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.

Surface-Mount Light

Surface Mount Trailer Light Installation Diagram

Surface-mount trailer lights install using a flange or bracket with mounting holes. These lights lay flat against the trailer surface and only require a small, often pre-existing hole, for wiring. Mounting hardware is used to secure the light to the trailer.

M108WR Peterson Clearance or Side Marker Trailer Light w/ Reflector - Incandescent - Oblong - White Base - Surface Mount - Red Lens - P2 Rated

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Peterson Clearance or Side Marker Trailer Light w/ Reflector - Incandescent - Oblong - Red Lens - 423000

Average Customer Rating:  4.8 out of 5 stars   (66 Customer Reviews)

4-1/16" x 2-1/16" Oblong. Incandescent trailer ligth serves as a clearance or side marker light. Built-in reflex reflecor. Durable molded plastic base. Surface mount - hardware not included. 1-Wire design. P2 rated. (1) 194 bulb.


Exact replacement on 1998 United Expressline 7x14 box trailer. Also replaced license plate light with holder.


Um, having only one wire rather than two creates more work for installation. Otherwise OK

We do have a LED light that has the two wire design. It is part # MCL31RB
Optronics LED Clearance or Side Marker Light w/ Reflex Reflector - 6 Diodes - Oval - Red Lens
-- Etrailer Expert Jenny N - 07/15/2022


Works fine>


Great product, as advertised.
this item based upon guidance from etrailer that it is the replacement for "SAE-AP2-79" printed on lens of other red marker lights on camper similar to the one I lost.
Needed lens only, but ordered the complete unit anyway.
I used the lens from new item received from etrailer, fit it onto the existing base on the side of the camper.
Perfect fit although very slightly loose.
Used 2 tiny dabs on each side, of Silicone Adhesive, at 11 oclock on the left and 1 oclock on the right, to ensure the snap-to fit will never release, but lens is still removable if need be.
All that said, noticed the same item at Home Depot about the same price... with no shipping charge. However still good buy from etrailer due to time and trouble saved.

Richard - 05/11/2019


Worked perfectly


I ordered a number of items for a trailer that I am bringing back to life after leaving is stand at the beach for nearly 12 years. I got great advice on what parts I needed to match the original Haulmark lights and license plate bracket/light and also ordered a new breakaway system and safety chains. Everything was priced reasonably, shipped in a timely fashion and was a cinch to install as it all fit right to the original footprints.
I also found answers to my questions on some electrical issues by browsing the Q&A sections here.
Happy customer.


We have a 20 year old Bounder RV. After 20 years of outdoor storage, a few of the lights had cracked ... the occasional tree limb did not help.

I have ordered several lights and lenses from etrailer.

In stock, good price and fast shipping .. what more needs to be said.


Excellent product at great prices plus super customer service. I ordered more than they had in stock so they called me the next day to apologize and tell me the shipment would be delayed a week and the expected ship date. They held up billing my PayPal account until the parts shipped. The parts shipped when they said and arrived inperfect condition. It is rare to find a company that treats their customer so well. I couldn't be happier with Highly recommend them. Have them bookmarked now to check when I need parts for my motorhome or trailer. Thanks etrailer.


Took me only a few minutes to order and a few days for it to arrive!! It fits perfectly and I know where to come each time one of our employees breaks a light on the trucks!! Great products!! Fast shipping!!


Perfect replacement for the one missing and one deteriorated original Fruehauf running lights on my cargo trailer. Same footprint, mounting holes, and wiring pass-thru hole. Easy wire connection using new quick splice wire connectors too.


I ordered replacement marker lights for both the front & back of my
motorhome that are just like the originals. I have replaced several
already and will be working on the rest over time. The lights are
excellent and working fine.


This item was exactly as described, sold at a remarkably low price, and delivered very promptly. Score me as being a very happy customer. The lights I received did not have the eTrailer branding shown in the product photo, which is good...

These lights were to replace ones on my '94 Jamboree, which mounts the lights on studs so the fastener hole spacing is critical. Fortunately eTrailer had a dimensional drawing that made it easy to determine that the lights would fit. I wish every supplier would have dimensional drawings of their products, and it is what I hate about the big gorilla in the online field: they never have proper specifications of their products. Thank you, eTrailer: you do it right!


Just what I was looking for.
Excellent service!!!!!!!!!!!!!!!!!!1 Thank you!!


It was easy to order. The information as for the product was complete. Everything came on time.


These lights are a modern rendition of the one's I'm replacing on my Wheel Horse tractor. I have ordered from before and have been very satisfied with their products and service. Ordering is easy and the shipping time isn't bad.


I used this marker light on my wheel horse tractor model 520 . I only needed the lens as I cracked the original. It fit perfectly. Thank you!


The product was a great value and arrived with no damage and nicely packaged. I've got an older wheel horse garden tractor that I'm putting these lights onto. I found similar lights on ebay for $10 each plus shipping. I got them on etrailer for a 1/3 the cost for the same light.


Lights have one wire and use screw to ground to body. Difficult to find these.


The product was exactly as described on the website and was shipped out very quickly even using the least expensive option. I am definitely going to keep in mind for any of my future needs.


They are working very well and special thanks to etrailer's customer service for quick shipping of the replacement. Good job


Just What I needed to complete the entire retro fitting of my home made utility trailer. Great Customer Service. Thanks etrailer


I have an older class c motorhome and needed to replace some of the lights. Unfortunately I couldn't find any that were exactly like the ones I had so I took a chance on these and with a little modification they worked just fine.


I bought this light as a replacement for my horse trailer light. Product matched description and works well! Great customer care at eTrailer.


This is the second side lamp I've purchased from etrailer, and both of them were easy to install and work great.


This is exactly what I needed.

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Employee Cole B
Installed by:
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