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Optronics Trailer Clearance and Side Marker Light - Incandescent - Round - Amber Lens

Optronics Trailer Clearance and Side Marker Light - Incandescent - Round - Amber Lens

Item # MC58AB
Our Price: $6.43
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Trailer Lights
Shipping Weight: 0.12 lbs
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2-1/2" Diameter round. Incandescent trailer light serves as a side marker light and clearance light. Durable polycarbonate housing and snap-on lens. Surface mount to trailer. 1-Wire design. PC rated. (1) 194 Bulb. Great Prices for the best trailer lights from Optronics. Optronics Trailer Clearance and Side Marker Light - Incandescent - Round - Amber Lens part number MC58AB can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (92)
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Optronics Trailer Lights - MC58AB

  • Clearance Lights
  • Round
  • Incandescent Light
  • Amber
  • 2-1/2 Inch Diameter
  • Surface Mount
  • Rear Clearance
  • Side Marker
  • Non-Submersible Lights
  • Optronics

2-1/2" Diameter round. Incandescent trailer light serves as a side marker light and clearance light. Durable polycarbonate housing and snap-on lens. Surface mount to trailer. 1-Wire design. PC rated. (1) 194 Bulb.


  • Round incandescent trailer light functions as a clearnce light and side marker light when properly mounted
  • Incandescent bulb can be easily replaced
  • Durable polycarbonate housing and snap-on lens
  • Amber lens over incandescent bulb
  • Compatible with 12V DC systems
  • Surface mount to trailer - hardware not included
  • Single wire design grounds through mounting hardware
  • PC rated


  • Dimensions: 2-1/2" diameter x 1-1/16" thick
  • Distance between mounting holes (center on center): 1-1/2"
  • Bulb type: 194
  • 3-Year warranty

Manufacturer Cross Reference
Light will work as an exact replacement for:
Uni Bond # ML2500A
Grote # 45413
Peterson # 104A

Optronics MC58 Series Marker Clearance Light Dimensions

PC-Rated Lights

Diagram of light spread for PC rated light

A PC-rated light produces a 90-degree angle of light to either side of its centerline for a total of 180 degrees of coverage. This beam pattern can be clearly seen when you are standing directly in front of the light, as well as when you are standing on either side of the light. When properly installed, this type of light can function as both a front clearance light and a side marker light or as a rear clearance light and side marker light.

MC58AB Optronics Clearance and Side Marker Trailer Light - Incandescent - Round - Amber Lens - PC Rated

Alternate part number: MC-58AB

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Optronics Trailer Clearance and Side Marker Light - Incandescent - Round - Amber Lens - MC58AB

Average Customer Rating:  4.9 out of 5 stars   (92 Customer Reviews)

2-1/2" Diameter round. Incandescent trailer light serves as a side marker light and clearance light. Durable polycarbonate housing and snap-on lens. Surface mount to trailer. 1-Wire design. PC rated. (1) 194 Bulb.


I bought 5 of these amber lights for the front of my trailer, and 5 red counterparts for the back, and similar oval side lights too, to replace all of the 50-year-old corroded lights on my 1970 Shasta M1400. I am super pleased with them, as they look period-appropriate, and are very bright as well. The only issue I had was that the Shastas of that period used the aluminum skin of the trailer as the ground, so there is no "ground wire." On a couple of them, the caulking I put under the lights made the ground screw not find the metal skin to ground the circuit. So just a note to be careful when you put the caulk on the back of the light when you are installing. Make sure you don't caulk over, and thus insulate, the ground plate. Btw, this was my first purchase from etrailer.. and in the past year, I have purchased probably another $xxxx of stuff for our trailer. Great selection, great service. This website really should be your first stop when modernizing your "vintage" trailer.

John V.


A year after purchasing these, I continue to be very pleased with these lights. I actually replaced all 20 of the marker lights and the big tail lights with these LED lights from e-trailer. I have had only one marker light lose its ground connection, which I remedied by replacing the sheet metal mounting screw with a slightly large screw. As noted above, this is not a problem with the LED lights, but rather, with the vintage trailers system of grounding through the sheet metal skin of the trailer, rather than providing a positive and negative wire lead to each light. People often stop us at camp grounds to ask questions about our old shasta, and one person even marveled that the lights were still working after 50 years. A good testament to how natural they look.


I am restoring a 1988 Big Foot travel trailer, these were the perfect replacements for side marker lamps. Lamps were received a day early and packaged well, I would highly recommend working with E trailer.


I love them!



Awesome! I love the style of them


You guys are great and your products are too!
In the near future I want to help my friend buy a tow package 2" trailer hitch for her 2001 Lexus RX 300. I was hoping you could provide installation instructions.
I tried to look up a hitch made of round tubing which contoured nice with the existing vehicle bumper lines.
This hitch should also have a trailer lights connector plug that will fit with the factory installed plug under the fuel tank plastic liner.
Keep in touch and let me know if you can help me to help install this for my friend.
total cost APX: 175-200.00 and free delivery.

Etrailer Expert

Heather A.


We do have hitches available for the 2001 Lexus RX300.but at this time we do not have a round tube design option. The best option we have available for the Lexus is draw-tite 2 inch hitch part # 41541. It is a square design hitch but is custom fit for the Lexus and bolts in using the existing holes in the frame without drilling. It is a 2 inch hitch and can handle up to 350 lbs of tongue weight. This will be the best option if you are using the hitch for a bike rack because the curt option for the Lexus requires a stabilization strap while using a bike rack. I have attached a link below for the hitch and installation video.





Thank you for the fast and prompt shipping and for having the item I needed.


I searched for 2 1/2" red and amber lights for some time, before being introduced to These lights were a good fit for my project, restoring a camp trailer, and they were very reasonably priced. Once ordered, customer service was in contact with me until my order arrived, via email. Great follow up!



Happy New Year! Yes, I did purchase and receive the lights. They have been installed and work well. The trailer that I was working on, was a restore project. I couldnt find any lights that were an exact OEM part, but with a slight modification, these worked out well. And they look great!


It was inexpensive, but a quality product. I purchased it to replace exterior running lights on my camper. I am planning on replacing the incandescent bulb with a LED bulb. This item was much cheaper than the LED version. LED bulbs in quantity are about $1.


I’ve been looking everywhere for lights for my 1980 golf cart and I thought of etrailer and you had just what I needed. Thanks


I completely rebuilt my boat trailer and used a lot of parts from e trailer

Every part was of great quality. Very good prices and fast shipping. I would
use them again for all my trailer needs.


Perfect replacements for the original lights on my vintage camper!

Shauna H.




I used five of these to replace the clearance lights on my 1999 Cotner horse trailer. They worked very well and all systems are now go!


The staff at E-trailer were excellent. There was going to be a delay on one of my items and they got a hold of me with another option if I didn't want to wait. I will definitely use them again for future purchases.


I've ordered a number of parts from etrailer over the years and everything came on time and was correct it's a joy to do business with them they're very good at getting the correct part the first time


Great product. Well designed, just what I needed to replace old, outdated, and worn old light covers. Will order again for sure.


I had a hard time finding this item here in Hawaii, but got to find it here at etrailer. The product looks great and works well. We bought another one just in case we needed it.


I have had nothing but good results from these people and their products so far I have rebuilt two trailers with their parts and all is well with both of them
Thank you all.


Just what I ordered thanks for the fast service...Your AAA in my book ... I'll be ordering from you in the future .... Thanks again for the great job keep it up...

Sonny G.


I have been very happy with the marker lights .. They seem to be lasting longer then the stock lights.. I have been thinking on ordering more to replace on my other trailers.. Wonderful marker lights..


Everything that I have EVER ordered from ETRAILER has been exactly what I ordered and in perfect condition when it arrived. The product is first class and a fair price. I recommend this company to anyone.


Found hard to find part at this web site very good web site and quick shipping will use again


Good quality for the price. Delivery time was excellent.
Great service on the question I had. Will buy from etrailer again.


Excellent lights. As close to OEM as we could find. Easily installed and all grounded with a screw into the camper shell.


Most excelent price and stupid fast deliveray, Will assuradly be placing further orders with etrailer


Very quick service, good communication and very good price. No problems whatsoever, buy anything trailer related from these guys!! Thx


They were a Christmas gift, not yet installed on a very old RV, but they look like a perfect replacement.


Just what I needed.

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