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Miro-Flex Thinline LED Trailer Clearance or Side Marker Light - Sumbersible - 4 Diodes - Amber Lens

Miro-Flex Thinline LED Trailer Clearance or Side Marker Light - Sumbersible - 4 Diodes - Amber Lens

Item # MCL63AB
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Trailer Lights MCL63AB - Amber - Optronics
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4-1/16" x 1-1/4". Waterproof, LED trailer light serves as either a side marker light or clearance light. Miro-flex reflector increases light output. Surface mount with bracket (not included). Accepts 1- or 2-prong plug. P2 rated. Lowest Prices for the best trailer lights from Optronics. Miro-Flex Thinline LED Trailer Clearance or Side Marker Light - Sumbersible - 4 Diodes - Amber Lens part number MCL63AB can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (157)
  • Q & A (13)
  • Photos
  • Why etrailer?

Optronics Trailer Lights - MCL63AB

  • Clearance Lights
  • Rectangle
  • LED Light
  • Amber
  • 4L x 1W Inch
  • Surface Mount
  • Optronics
  • Submersible Lights
  • Rear Clearance
  • Side Marker

4-1/16" x 1-1/4". Waterproof, LED trailer light serves as either a side marker light or clearance light. Miro-flex reflector increases light output. Surface mount with bracket (not included). Accepts 1- or 2-prong plug. P2 rated.


  • LED trailer light functions as a clearance light or side marker light when properly mounted
  • Thinline Series has a low profile so that light can fit in tight spaces
  • Sonically sealed, waterproof housing and lens unit is submersible
  • Miro-flex faceted reflector provides increased light output with a contemporary appearance
  • LEDs make great replacements for incandescent lights
    • Last 50 times longer
    • More efficient - provide brighter light with less power output
    • No bulbs to replace - no brittle filaments
  • Durable polycarbonate housing and lens
  • Amber lens over white LEDs
  • Compatible with 12V DC systems
  • Surface mount on trailer with bracket (A65B - sold separately)
  • Accepts industry standard 1-prong or 2-prong plug
  • DOT compliant
  • P2 rated


  • Dimensions: 4-1/16" long x 1-1/4" tall x 1-1/8" thick
  • Distance between mounting holes (center on center): 3"
  • Diodes: 4
  • Power draw at 12.8V: 0.051 amps
  • Lifetime warranty on LEDs

Optronics MCL63 Series Miro-Flex Amber LED Marker Clearance Light Dimensions

Sonically Sealed, Waterproof Trailer Light

The waterproof construction of this light makes it ideal for use on trailers that may be submerged, like a boat trailer. The housing and lens are sonically sealed together to create a single unit, which means that water will not get into the light and damage the diodes or circuit board.

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.

MCL63AB Optronics Miro-Flex Thinline LED Clearance or Side Marker Trailer Light - Sumbersible - 4 Diodes - Rectangle - Amber Lens - P2 Rated

Alternate part number: MCL-63AB

California residents: click here

Customer Reviews

Miro-Flex Thinline LED Trailer Clearance or Side Marker Light - Sumbersible - 4 Diodes - Amber Lens - MCL63AB

Average Customer Rating:  4.8 out of 5 stars   (157 Customer Reviews)

4-1/16" x 1-1/4". Waterproof, LED trailer light serves as either a side marker light or clearance light. Miro-flex reflector increases light output. Surface mount with bracket (not included). Accepts 1- or 2-prong plug. P2 rated.


These lights look really sharp and very clean! 928119

by: 12/08/2020


by: 10/19/2020

There great.. no problem scene I put them in 900819

by: 09/19/2020

My new lights and harness were easy to attain understand and install. It came with everything I needed to rewire and install new lights in out and around my entire trailer. 896049

by: 08/12/2020



Easily replaced the broken one. Very br ight! 856840


Great products looks good on Trailor. 795813


Nice lights- they plugged right into the existing light sockets and are much brighter. They seem to be holding up well against wet and snowy weather. 793510


THIS is my choice for enclosed trailer clearance lamps . Nice ass’y when used with corresponding mounting base . Same for the RED . 783497


They are very bright and still look new after 1 year. 777912


Nice and brite! 775256


Took great and were a perfect fit. Replaced all the marker lights on my 1998 Alaskan with the amber and red. Don’t forget to get the mounting bracket. 766719


Would always buy from you at etrailer. Thanks Rob 766039


Lights are nice looking and after a year there still working just fine. I would recommend these lights. 749361


Everything looks great. Got here super quick. 722522


Worth the purchase great product 704996


These are tons better than the 9 year old leds I had. 670386


Perfect replacement for my 2004 OEM lights. I converted the in closed trailer to LED. It’s been around a year and everything is just fine. Remember, quality first price second. [base plate A65PB, LED yellow AL91AB, LED red AL91RB] 659309


Awesome product at an excellent price I would definitely recommend these for anyone who has a trailer 652538


Just wrote a review on this product, i highly recommend this product. easy to i stall. and highly visible on those foggy days and nights. 629518


Replaced Sealed incandescent lights with LEDs. Couldn’t be happier. Lights are much brighter and have lasted or year so far having been dipped in salt water frequently. 586421


Excellent! 562630


I have not assembled the trailer yet, but the quality of the parts is good, delivery was quick and the price was great due to the free shipping. So far my favorite place to buy trailer parts. 554007


The lights work perfectly. The customer service is the best. Have them on my boat trailer all around. 527490


I have replaced all my lights and wiring on my boat trailer! I love the quality of the lights that I have bought! 485443

Show More Reviews

Ask the Experts about this Optronics Trailer Lights

  • Replacement Clearance Light for 1997 Champion Bass Boat
    The Miro-Flex Thinline LED Trailer Clearance or Side Marker Light # MCL63AB that you referenced will work great as a replacement for the clearance light on your trailer frame currently. For a mounting bracket that includes the wiring you'd want the part # A65PB and you'd be set.
    view full answer...
  • Do I Have to Replace the Wedge Lights on my Boat Trailer with Wedge Lights for LED Upgrade
    When replacing trailer lights (with or without LED) you don't necessarily have to get the exact same light or even light style. Most people like to keep the same style and size so that they don't have to mess with repainting or making sure that everything lines up correctly. If your current light has the same dimensions of the Peterson Sealed Wedge-Type Clearance Marker w/Reflex # M116A then the Optronics Sealed, Miro-Flex, Thin Line, LED Trailer Marker # MCL63AB has slightly different...
    view full answer...
  • How to Pick Out Trailer Hubs for Older Dilly Trailer
    In order to pick out the correct hub assembly for a trailer you are going to need know a few key pieces of information. I wish there was a way to find out what you need based solely on trailer info that you gave, but that's not something that's readily available. The first thing you will need to know is the bolt pattern of your hubs. This is so you get a hub that is compatible with your wheels. I attached an FAQ article on determining bolt pattern for you to check out. Next thing you...
    view full answer...
  • Is the Optronics Micro-Flex LED Clearance Light Both a Light and Reflector
    My contact at Optronics confirmed that the # MCL63AB Sealed Micro-Flex Light is only a clearance light and not also a reflector. The reflective geometric design in the lens is to help to increase the light output of the LED. It will not really reflect much light that will happen to shine at the lens.
    view full answer...
  • Is a Base Required for Mounting the # MCL63AB and # MCL75AB Trailer Side Marker Lights
    Yes, a mounting base is necessary for the # MCL63AB, you will need to use either the Black Bracket and Single Wire Plug, item # A65PB, or the Chrome Bracket and Single Wire Plug, item # A67CB with this light. The # MCL75AB, Thin Line Trailer lights also require a mounting base. Brackets for the # MCL75AB include the # A65PB and the # A67CB bases, mentioned for the # MCL63AB light.
    view full answer...
  • Recommended White LED Utility Light Similar to Optronics # MCL63AB
    The closest option we have available to the Optronics Micro-Flex Thinline LED Clearance Light # MCL63AB that uses a white lens is with the Optronics Thinline LED # UCL65CB. This waterproof rectangular LED light has overall dimensions of 4 inches long, 1-1/4 inches wide, and 1 inch deep. Its 6 LED diodes should give you a much brighter and longer lasting unit compared to your existing incandescent models. This will work great to light up your entry steps and sewage connections. I have...
    view full answer...
  • Installing Optronics LED Trailer Marker # MCL63AB on Trailer
    In order to install the Optronics Sealed Micro-Flex Thin Line LED Trailer Marker # MCL63AB on your trailer, you will need to add a bracket and wire harness, such as the Black Bracket with Single Wire # A65PB or the Gray Bracket and Single Wire Plug # A66PB. The choice between the two brackets is simply based on color preference, as they will wire and install the same way. The bracket will ground through its hardware, so it just needs a single wire to power the light. You will want to...
    view full answer...
  • Does Sealed, Miro-Flex, Thin Line, LED Trailer Marker Light # MCL63AB have 2 Prongs in the Back
    Sealed, Miro-Flex, Thin Line, LED Trailer Marker Light # MCL63AB does indeed have the 2 prongs at the center on the back of the light. I have included a picture showing this for you.
    view full answer...
  • What is Difference between Miro Flex and Thin Line Optronics Clearance Lights
    The Miro-Flex part # MCL63AB and the Thin Line part # MCL75AB are both very similar. They essentially are just visual differences for the lens. The Miro Flex has more of a Euro style look where you can see the diodes and the reflective base in the light whereas the Thin Line has the diodes obscured. Both would work well and I would recommend you pick which you like the appearance of more.
    view full answer...
  • Chrome Base Recommendation for the Optronics Clearance Light # MCL63AB
    Yes, the Chrome Bracket and Single Wire Plug # A67CB that you referenced is the correct base for the # MCL63AB and # MCL63RB that you plan on getting. The reason this bracket uses a single wire is because the light will ground through the mounting hardware. If you needed to run a second ground wire to the assembly you would only need to run the stripped ground wire around the mounting screw that attaches to the side of the base with the ground strap. See picture I attached to see which...
    view full answer...
  • Troubleshooting a Trailer Side Marker Light
    There could be a few things that might be cause your malfunctioning rear sider marker light. You will have to examine a few thighs to determine that issue. Most light today a sealed units that will have to be replaced in full instead of replacing a bulb. First, you will need to remove the light assembly from the side of the trailer and inspect the wire connections. Some of the light will have a removable plug that connects to the back of the light housing. if you have this, then make...
    view full answer...
  • Replacing 5th Wheel LED Marker Light Not Working
    The Miro-Flex Thinline LED Trailer Clearance or Side Marker Light - Submersible - 4 Diodes - Amber Lens # MCL63AB can't have the inside replaced. You would need to replace the entire LED light. Before replacing the light, you want to make sure you don't have a wiring issue. You can test the light with a 12v battery or you can test the wires using a circuit tester like # 40376.
    view full answer...
  • Will Thin Line Clearance Light # MCL63AB Work with a Mounting Bracket # A67CB on Aluminum Trailer
    Yes, the Chrome Mounting Bracket # A67CB that you referenced will work on your aluminum trailer with the Clearance Light # MCL63AB, but since you have an aluminum trailer and the bracket grounds through the mounting hardware you will also need a Two Wire Plug for Thin Line Series Trailer Clearance and Side Marker Lights # A68P.
    view full answer...

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Info for this part was:

Written by:
Tyler C
Video Edited:
Patrick B
Video Edited:
Jacob T
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Jeffrey L
Updated by:
Laura H
Updated by:
Brian T
Installed by:
Cole B

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