1. Trailer Lights
  2. Optronics
  3. Clearance Lights
  4. Round
  5. Incandescent Light
  6. Amber
Optronics Trailer Clearance and Side Marker Light - Incandescent - Round - Amber Lens

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

Item # MC58AB
lowest price pledge
Our Price: $3.40
You Save: 72%
Trailer Lights
Orders above $99 qualify for Free Shipping
Shipping Weight: 0.13 lbs
In Stock
zoom in icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images


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. Lowest 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 etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (58)
  • Q & A (5)
  • Videos (1)
  • Photos
  • Why etrailer?

Optronics Trailer Lights - MC58AB

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

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

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

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 - MC58AB Review

Today we're going to be taking a look at part number MC58AB, this is the Optronics two and half inch round trailer clearance and side-marker light. The PC rated light is going to function as both a clearance and side-marker light when mounted at a 45 degree angle. It's going to feature a weather and corrosion resistant design, not to be confused with water proof. This light is not waterproof, but it will stand up well when exposed to normal weather conditions. It's going to contain one incandescent bulb. It's going to have the acrylic amber lens, with a white ABS plastic housing. If you're on the backside it's going to have out mounting locations.

If we take a measurement, the distance that we have between the two, measuring on center, that's going to be separated by an inch and a half. The black wire is going to be a single wire design for power, and then the unit is designed to ground through the mounting hardware. Your mounting hardware is included. It's going to feature a replaceable lens and bulb. It's going to use bulb number 194. The easiest way to get the lens off, is to take a Flathead screw driver, place it between the housing and the lens, and simply just give it a little bit of a turn.

This will allow the two to disengage from one another. This is house you're going to mount it. You're going to need to take the lens off, mount this to your surface and then snap the lens back on. But you can see over here, it's got the metal tab around the mounting location, that's going to be the ground connection. So again it is designed to ground through the mounting hardware, and that's why it's a single wire design and not a two wire design. This is going to give us a diameter of two and a half inches and it's going to give us an overall depth of about one and one sixteenth of an inch.

Power draw is going to be 0.2 amps at 12.8 volts, and we're going to go hook this up to our external power source, that way you can see what it looks like with power running to it. So you can see here, it sends out a really nice consistent signal. It's going to contain one incandescent bulb. The acrylic amber lens is going to let a lot of light to come through and it's going to allow it to be distributed pretty evenly. That's going to do it for today's review of part number MC58AB, this is the Optronics two and half inch round trailer clearance and side marker light. .

Customer Reviews

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

Average Customer Rating:  4.9 out of 5 stars   (58 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.

- MC58AB

Great products at great prices, couldn't do it without cha. 593851

- MC58AB

The sight was very helpful. it made my part easy. 775898

- MC58AB

They were a Christmas gift, not yet installed on a very old RV, but they look like a perfect replacement. 734587

- MC58AB

Very pleased with product. The shipment was made the next morning and arrived in time for my weekend project!! Thank-you!! 704317

- MC58AB

Great product. 696772

- MC58AB

great product. 696048

- MC58AB

material was fine , order wascomplete. 693812

- MC58AB

Good value. Fast shipping. Well pleased. Thanks Steve 691731

- MC58AB

Product is great and was shipped prompt ly. 688157

- MC58AB

great replacement for originals and super value. 660367

- MC58AB

Very quick service, good communication and very good price. No problems whatsoever, buy anything trailer related from these guys!! Thx 658624

- MC58AB

Found hard to find part at this web site very good web site and quick shipping will use again 650989

- MC58AB

Great price, great product, and fast shipping. Thanks.... 648076

- MC58AB

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. 640279

- MC58AB

Just what I was looking for, using them on my 1965 FAN travel trailer. 618061

- MC58AB

Product was just what I wanted and this company is always fantastic to deal with:) 598333

- MC58AB

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. 593661

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
Draw-Tite Max-E-Loader Trailer Hitch Receiver - Custom Fit - Class III - 2"
. 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.
-- Heather A - 12/29/2018

Gonzalo - 12/30/2019


- MC58AB

Purchased numerous of these over a year ago and they work just as perfect as when I purchased them. Excellent product at even a better than excellent price. 580667

- MC58AB

perfect fit 559652

- MC58AB

Perfect replacements for the original lights on my vintage camper! 556135

Shauna H - 08/21/2019


- MC58AB

Great product, exactly what I wanted 549366

- MC58AB

Great lights easy to install, I would buy them again. 548276

- MC58AB

Great product. Well designed, just what I needed to replace old, outdated, and worn old light covers. Will order again for sure. 542955

- MC58AB

Product as described, great price. 509317

- MC58AB

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. 503558

Show More Reviews

Ask the Experts about this Optronics Trailer Lights

  • Replacement Trailer Clearance Light for 2-1/2 Inch Diameter
    We have 2-1/2 inch diameter replacement lights, but we don't currently have just the lens with that diameter. I've linked the page to our replacement lens options and also the replacement light options. You will need to purchase the entire light, but the lens can technically be removed and placed on your current light fixture as long as it isn't a sealed light.
    view full answer...
  • Replacement Single Wire Clearance Light Recommendation for RV
    We do offer numerous options for single wire clearance lights. The 2-1/2" Round Trailer Clearance and Side Marker Light, # MC58AB, and Rectangular LED Trailer Clearance Light with Reflector, # MCL44RB1, are just two examples. If you would like to send me the manufacturer information off of the light housing or the dimensions and lens color of your current light, I would be happy to help locate a replacement.
    view full answer...
  • Red and Amber Round Clearance Lights With Flush Mounted Based
    We do have both red and amber round clearance lights with a flush-mounted base you can screw in. The 2-1/2" Optronics # MC58AB is an amber light while the # MC58RB is red; you only need to remove the lens to access the white mounting base, screw it in and then put the lens back on. I have added a video review which details this for you to check out.
    view full answer...
  • Amber Side Marker Light Recommendation Same Size as MC56RB
    The part # MC56RB is a 2-1/2 inch light. For a similar dimension amber clearance light we have the part # MC58AB but this is a surface mount light.
    view full answer...
  • Recommended LED Clearance Light To Replace Peterson Incandescent Light
    The clearance light I recommend is the Peterson Piranha part # 162A. This is a 2-1/2 inch x 3/4 inch round light with 3 LED diodes and has an amber lens. The grommet and pigtail for this light is sold separately and is part # 162-18K. We have one surface mount clearance light that would be the same size as the lights you currently have. This is also an incandescent light and is the Optronics Round Trailer Clearance and Side Marker Light, part # MC58AB.
    view full answer...

  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality trailer lights for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate trailer light information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Updated by:
Laura H
Updated by:
Brian T
Installed by:
Cole B

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time.