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Miro-Flex LED Clearance or Side Marker Light w/ Reflector - Submersible - 9 Diodes - Red Lens

Miro-Flex LED Clearance or Side Marker Light w/ Reflector - Submersible - 9 Diodes - Red Lens

Item # MCL50RB
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Optronics Trailer Lights - MCL50RB
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2" Diameter round. Waterproof, LED trailer light serves as either a side marker light or clearance light. Miro-flex reflector increases light output. Recessed mount with grommet (sold separately). Accepts standard 2-prong plug. P2 rated. Lowest Prices for the best trailer lights from Optronics. Miro-Flex LED Clearance or Side Marker Light w/ Reflector - Submersible - 9 Diodes - Red Lens part number MCL50RB can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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Optronics Trailer Lights - MCL50RB

  • Clearance Lights
  • Round
  • LED Light
  • Red
  • 2 Inch Diameter
  • Recessed Mount
  • Rear Clearance
  • Side Marker
  • Submersible Lights
  • Optronics

2" Diameter round. Waterproof, LED trailer light serves as either a side marker light or clearance light. Miro-flex reflector increases light output. Recessed mount with grommet (sold separately). Accepts standard 2-prong plug. P2 rated.


  • LED trailer light functions as a clearance light or side marker light when properly mounted
  • 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 ABS housing and acrylic lens
  • Red lens over white LEDs
  • Compatible with 12V DC systems
  • Recessed mount with grommet (A54GB sold separately)
  • Accepts industry standard 2-prong plug
  • DOT compliant
  • P2 rated


  • Dimensions: 2" diameter x 13/16" thick
  • Diodes: 9
  • Power draw at 12.8V: 0.047 amps
  • Lifetime warranty on LEDs

Optronics MCL50 Series Miro-Flex Red 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.

MCL50RB Optronics Miro-Flex LED Clearance or Side Marker Trailer Light w/ Reflector - Submersible - 9 Diodes - Round - Red Lens - P2 Rated

Alternate part number: MCL-50RB

California residents: click here

Customer Reviews

Miro-Flex LED Clearance or Side Marker Light w/ Reflector - Submersible - 9 Diodes - Red Lens - MCL50RB

Average Customer Rating:  4.9 out of 5 stars   (1309 Customer Reviews)

2" Diameter round. Waterproof, LED trailer light serves as either a side marker light or clearance light. Miro-flex reflector increases light output. Recessed mount with grommet (sold separately). Accepts standard 2-prong plug. P2 rated.


Lights are brigh LED are more visible than the incandescent lights.


Ordered a replacement and spares just in case. Had 1 lose a couple leds but it was still working and bright. Overall still happy and no issues with the other 8 red ones on my trailer.


I just installed 5 of these on my car trailer, replacing older incandescent lights. These are so much brighter! Great fit, easy to install. I haven’t had a chance to get them wet yet, but I’m sure they will hold up.


Product was as described. I chose this product because of its ease of use and brightness when on. I consider the light upgrade a safety feature for my trailer. No more “ filament flickering” from rough road.


Changed my equipment trailer lights over to LED. I was able to get everything I needed plus quick shipping.


I will be using thiese products on a trailer I am refurbishing to pull behind my trike. The only drawback I have noticed is that I wish the black grommets came with a touch a chrome, to dress up the application.

Hello Ken - we do have a 2 round chrome trim ring for the grommet mount lights. The part is A55CB, and they would look great being pulled behind your trike!
Dustin S from - 10/16/2014

Thanks for chiming in Ken. I have provided a link to the # A55CB
Chrome Trim Cover for 2" Grommet Mounted Lights
below for reference.

-- Etrailer Expert Rachael H - 10/20/2014


I put these puppies on my 2006 Blizzard snowmobile trailer, very bright and the 2 in grommets work great. Use some WD40 on the grommet so much easier to get in.


Exactly what they said little bit larger then original light but very bright


A very nice light its bright and easy to install. Working with etrailer.com also has been great.

After a year the lights are still looking and working great.
Don J - 03/07/2018


I bought a set last year form another distributor and were to be watertight. The ones I bought from etrailer states waterproof and they are going on a boat trailer. We will see how well they work once I launch the boat and see if any water penetrated the inside of the light.


I ordered a 2" LED clearance light for my 5th wheel because I could not find a suitable replacement locally. The service was excellent and the product better quality than the original. etrailer.com will be the first place I go in the future!


Products works great after use for a year and I have found other parts from this vendor that work well and last a long time.


This was a perfect replacement for my 2015 Bri-mar dump trailer. Very pleased! Very bright!


There are alot of lights out there and I looked for the best quality. Alot are cheaper but I looked for the best one. thanks Just because it is imported the quality does not have to suffer


Absolutely the best service for delivery time & product. etrailer never disappoints me!


I rated "good" only because of my application. I had 6 of these on back of my 1 ton flatbed 3 high and 3 low and for what I needed they where too bright. Working around the truck at night was blinding. They certainly would make a trailer visible. I went with the 4 Diode and they were PERFECT..


I wanted to replace all the lights on my trailer to LED, found what I wanted and price and quick shipping made the purchase great.


Replaced old side marker lights on trailer really makes a difference in looks and bright light.


My trailer is loaded with Optronics lighting, there waterproof and bright and easy to mount with the installation rings, best on the market!


Outstanding! I didn't use the product for it's intended purpose, but rather as a "third eye" stop light for my Jeep. Works perfect! Just what I wanted. I'm very glad I stepped up and purchased the pigtail and grommet. Without these two extra items, my project would have failed.


nice looking product to dress up my 10 year old equipment trailer, these helped make it look more modern and the led lights rarely don't work.


Worked as expected. Not only brighter than the original incandescent lights but the Optronics Miro-Flex product looks great even when not lit.


All around good experience! Person I dealt with was very knowledgeable about their products and order was received as expected.


These lights work great. Much brighter than the stock incandescent lights that I replaced.


Nice LED! ETrailer is great!

Show More Reviews

Ask the Experts about this Optronics Trailer Lights

  • What is Hole Diameter Needed to Install Miro-Flex LED Clearance or Side Marker Light
    The grommet part # A54GB that you have with the light part # MCL50RB requires a hole diameter of 2-5/16 inches. So you'd need to cut a hole 2-5/16 inch in diameter and the grommet and light will slip right in and be secure.
    view full answer...
    Image 1 for
  • Will the Miro-Flex, 2 Inch Round, LED Trailer Light, # MCL50RB, Fit an Enclosed Snowmobile Trailer
    If adding the Optronics light, # MCL50RB, you will need about 2 inches of space behind your existing light for it to fit. The reason is the Optronics light is deeper including the pigtail mounting surface and the pigtail, # A86PB. If you have at least 2 inches of clearance, then this light will fit in your existing 2 inch diameter hole with grommet # A54GB. Light # MCL55RB is not quite as deep at 1 inch overall, so that is another option for you.
    view full answer...
  • Type of Lubricant Used to Remove Trailer Light from Grommet
    Typically, our installers are using WD-40, or something similar, when they reference using lubricant.
    view full answer...
  • Recommended Miro-Flex Clearance Lights With Clear Lens For Trailer
    We do offer Miro-Flex lights with clear lens for your trailer, but none of the Miro-Flex lights we carry are round with clear lens. The lights I recommend with a clear lens are part # MCL-50CRK. These lights have 3 LED diodes and come with the plug and grommet needed to install. For a round 2 inch Miro-Flex light, we offer the amber light, part # MCL50AB and the red light, part # MCL50RB. To mount these lights you would need the rubber grommet, part # a54gb, and you would need...
    view full answer...
  • Replacement 2-1/2 Inch Round Marker Light on Triton Trailers Elite WCII Personal Watercraft Trailer
    I do not have a cross reference chart for Truck-Lite trailer lights, but we have several 2-1/2 inch round clearance lights that may work for you. I have attached a link that will take you to all of our 2 inch and 2-1/2 inch round trailer lights for you to check out. I have also linked a few LED and incandescent 2-1/2 inch round clearance lights for you to checkout below. The biggest difference between many of these lights is the depth of the lens. Most of the lights are either 11/16...
    view full answer...
  • Polarity of Optronics Sealed Micro-Flex LED Trailer Side Marker # MCL50RB
    The Optronics Sealed Micro-Flex LED Trailer Side Marker # MCL50RB referenced in your question does have polarity, but the PL-10 Plug # A46PB that you also have is designed so that it can only be plugged in one way. This is essentially how you will know which way to plug the harness into the light. Since LEDs use diodes, if you were to somehow connect the harness backwards, the light simply would not work and you would just need to turn it around and plug it back in. On the harness itself,...
    view full answer...
  • Recommended Red Clearance Light to Match Amber Clearance Light
    I believe you are looking for the Sealed, Miro-Flex, 2" Round, LED Trailer Side Marker, Clearance or ID Light, 9 Diode - Red # MCL50RB to go along with the Sealed, Miro-Flex, 2" Round, LED Trailer Side Marker, Clearance or ID Light, 9 Diode - Amber # MCL50AB for your trailer. You will also want the Right Angle 2-Wire Pigtail for Optronics Trailer Lights - 2-Prong PL-10 Plug - 6" Lead # A46PB and the 2" Round Grommet - Flush Mount - Open Back # A54GB for this installation. Let me...
    view full answer...
  • Replacement Round Amber, Round Red, And Oval Red LED Trailer Lights
    We do offer a similar P2 light that is LED. I recommend the GloLight LED Trailer Clearance or Side Marker Light - Submersible - 6 Diodes - Round - Amber Lens Item # MCL155AB. For the 30 series I recommend the Miro-Flex LED Clearance or Side Marker Light w/ Reflector - Submersible - 9 Diodes - Red Lens Item # MCL50RB. For the 60 series I recommend the ONE LED Trailer Tail Light with Weathertight Plug - Stop, Tail, Turn - Submersible - Oval - Red Lens Item # STL002RMB
    view full answer...
  • Availability of LED Amber and Red Clearance, Tail Lights, and Side Marker Trailer Lights
    The STL42RB does come in amber. It is # STL42AB. Use wiring harness # A45PB with it. For 2 inch diameter amber lights you can use # MCL50AB with # A49PB and # A54GB. For 2 inch diameter red lights you can use # MCL50RB with # A49PB and # A54GB. For amber teardrop lights, you may be able to use # CBL22AB. We also have a teardrop shape kit that you would use on the roof of a truck, # CB-15AK, but it is not LED. For red teardrop lights we also do not have an LED option but we do...
    view full answer...
  • Will 2 Inch Diameter Lamps Fit into Circular Cut Outs in Sides of Rola # 59502 Cargo Carrier
    The grommets for 2-1/2 inch lamps are a bit too big to fit into a 2-1/2 inch rough opening. The # A56GB grommet for instance, is meant to mount in a 2-3/4 inch rough opening. If you could enlarge the opening to 2-3/4 inches in diameter, then a 2-1/2 inch lamp like # MCL50RB would fit. If you decided to go this route, you'd tie the power for the lamps into the running lamp circuit. A # A46PB pigtail would be needed for each lamp. Honestly, using reflective conspicuity tape like part...
    view full answer...

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Info for this part was:

Employee Tyler C
Written by:
Tyler C
Employee Patrick B
Video Edited:
Patrick B
Employee Chris R
Video Edited:
Chris R
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Cole B
Installed by:
Cole B
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T

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