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LED Trailer Clearance or Side Marker Light w/ Reflex Reflector - Submersible - 8 Diodes - Amber Lens

LED Trailer Clearance or Side Marker Light w/ Reflex Reflector - Submersible - 8 Diodes - Amber Lens

Item # MCL59AB
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2-1/2" Diameter round. Waterproof, LED trailer light serves as either a side marker or clearance light when properly mounted. Built-in reflex reflector. Multiple mounting options. Accepts standard 2-prong plug. P2 rated. Lowest Prices for the best trailer lights from Optronics. LED Trailer Clearance or Side Marker Light w/ Reflex Reflector - Submersible - 8 Diodes - Amber Lens part number MCL59AB can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (27)
  • Q & A (7)
  • Videos (1)
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Optronics Trailer Lights - MCL59AB

  • Clearance Lights
  • Round
  • LED Light
  • Amber
  • Recessed Mount
  • 2-1/2 Inch Diameter
  • Optronics
  • Submersible Lights
  • Rear Clearance
  • Side Marker

2-1/2" Diameter round. Waterproof, LED trailer light serves as either a side marker or clearance light when properly mounted. Built-in reflex reflector. Multiple mounting options. Accepts standard 2-prong plug. P2 rated.


  • Round LED trailer light functions as a clearance light or a side marker when properly mounted
  • Built-in reflex reflector removes the need for a separate reflector
  • Sonically sealed, waterproof housing and lens unit is submersible
  • 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 electrical systems
  • Multiple mounting options
    • Flush mount to trailer with open back grommet (A54GB - sold separately)
    • Recessed mount to trailer with open or closed back grommet (A56GB or A57GB - sold separately)
  • Accepts industry standard 2-prong plug (A46PB or A86PB - sold separately)
  • DOT compliant
  • P2 rated


  • Dimensions: 2-1/2" diameter x 1-1/16" thick
  • Diodes: 8
  • Power draw at 12.8V: 0.047 amps
  • Lifetime warranty on LEDs

Manufacturer Cross Reference
Light will work as an exact replacement for:
Truck Lite # 10208Y

Optronics MCL59 Series 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.

MCL59AB Optronics LED Trailer Clearance or Side Marker Light w/ Reflex Reflector - Submersible - 8 Diodes - Round - Amber Lens - P2 Rated

Alternate part number: MCL-59AB

California residents: click here

Video of LED Trailer Clearance or Side Marker Light w/ Reflex Reflector - Submersible - 8 Diodes - 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 - MCL59AB Review

Today we're going to be taking a look at part number MCL598AB. This is the optronics sealed 2 and a half inch LED trailer or side marker light. It's going to have the built in reflector into the lens. That is Department of Transportation compliant. That's going to eliminate the need for a separate reflector. This is an amber round light. Again, it's going to function as your clearance or side marker light.

It's going to feature a really nice sealed water proof housing lens unit. It's going to contain 8 LEDs so it's really going to optimize your light output. LEDs are going to be great replacements for incandescent lights. They're going to burn bright, they're going to last longer. They're going to be much more efficient than incandescent lights. You also don't have to worry about replacing the bulbs or worry about the brittle filaments.

Here on the back side it's going to feature the nice white base. This is a grommet mount installation. It is going to require a grommet as well as industry standard 2 prong plug. Those items are going to be sold separately. It does make it very easy to upgrade from incandescent lights. Taking a look at the overall dimensions, starting with the diameter.

It's going to give us a diameter from outside edge to outside edge of 2 and a half inches. It's going to give us a depth of about 11/16th of an inch. This light is going to draw 0.045 amps at 12.8 volts. We're going to go and hook it up to our external power source. That way you can see what it looks like with power running to it. Simply just take our 2 prong plug, push it in until it seats correctly.

Then you can see here, it's got a multiple diode design. Again, it's going to contain 8 diodes. It's really going to optimize the light output. You go the two main LEDs here in the middle that really send out that strong consistent signal. Then you've got the other diodes that are kind of hidden behind that reflector. Which is going to make this light and your trailer highly visible. That's going to do it for today's review of part number MCL59AB, this is the Optronics sealed 2 and half inch round LED trailer light. .

Customer Reviews

LED Trailer Clearance or Side Marker Light w/ Reflex Reflector - Submersible - 8 Diodes - Amber Lens - MCL59AB

Average Customer Rating:  4.9 out of 5 stars   (27 Customer Reviews)

2-1/2" Diameter round. Waterproof, LED trailer light serves as either a side marker or clearance light when properly mounted. Built-in reflex reflector. Multiple mounting options. Accepts standard 2-prong plug. P2 rated.


Just received my lights in the mail yesterday. Not had a chance to install yet. Order complete and appears to have survived shipping. 657379


Great replacement light. Direct plug in and fit perfect. Much brighter and easier to see in mirror at night. Will eventually replace the other lights with these as well! 649262


Light is very brite and the reflectors are a nice touch. 613440


Two thumbs up. 603366


excellent product. great upgrade and replacement to what i had. i will continue to buy parts from this company!! 582927


Lights work great and are very bright. Shipping was very fast. 578871


Excellent light. Far superior to original incandescent type. Service was excellent and delivery was quick. Took about 5 days for delivery to Ontario, Canada. Thanks 526050


Very bright, good reflector, and visibl e. 516120


They look great and light up nice at night. Worth the money. 512691


Very happy with the lights, bright and match what we had on the truck. Will be buying from etrailer again. 474047


Great product 453569


what I ordered, not easy to find this light, wire and holder 448721


Direct replacement for the old constant burning out light bulb ones. 432718


Just what i was looking for 370228


Lights work great in and out of water 70 times in the last year - no issues - just the way I like it! Thanks, Richard M. 342685


Good products that were exactly as described on website. 335984


As described and works great. Great pr ice 335781


Products are excalty what we ordered to match what was on trailer. I placed order at 8:00pm on Wed night and two hours later order was ready to ship and I had my order Friday for weekend project. AWESOME!!!!! Can't believe they got order out that fast and correct !! 316021


Excellent service. Got everything I needed in a couple of days. Very happy with your service. 304985


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. 254967




Nice LED 178138


LED's fit right in place of old incandescent lights 134818


Awesome 109322


Spare for the RV. Wish etrailer carried the trim rings for these. Very fast shipping. 72429

Show More Reviews

Ask the Experts about this Optronics Trailer Lights

  • Replacement Amber Clearance Light for Dutchman Kodiak
    The lenses on clearance lights are not generally removable as they are often "sonically sealed" such as the Optronics Trailer Clearance or Side Marker Light # MC57AB; this means they are submersible. Instead of buying a light and taking the lens off I strongly recommend an LED Trailer Clearance or Side Marker Light w/ Reflex Reflector # MCL59AB for your Dutchman trailer because an LED is a far better, much longer lasting option. You only need to make sure your existing lights have the...
    view full answer...
  • Looking for Trailer Clearance Light to Fit 2-5/8 Inch Rough Opening
    I'd recommend the # MCL59RB for red or # MCL59AB for amber. The lamps are sealed and are waterproof, perfect for a snowmobile trailer. Each LED lamp is 2-1/2 inches in diameter. With the lamp, you'd use the # A57GB grommet, which requires a 2-25/32 inch hole, which is about .156 of an inch larger than the 2-5/8 inch hole you referenced. If your 2-5/8 inch measurement is right on the mark, it would take just a few moments with a Dremel or a round file to slightly enlarge the existing holes...
    view full answer...
  • Replacement Clearance Light with a Reflective Lens for a Horse Trailer
    The Optronics light, MCL71AB, does not have a reflector in the lens. I made a short video that shows the light with the lens off. It would be a fairly water resistant light. A better option may be # MC35AB. It is about the same size and it has a reflector in the lens. It is not as low profile as the flush mount light you referenced. If you are not opposed to switching to round we have # MCL59AB or # MC57AB which has a reflector in the lens and can be flush mounted using harness #...
    view full answer...
  • Trailer Wiring and Lighting Replacement for Trailer with 4.5 inch Red and 2.5 inch Amber Light
    For a 4-1/2 inch diameter trailer taillight that can do stop/tail/turn functions we have the part # STL43RB which would work well. For a rubber grommet then we'd need the part # A45GB. Then for a pigtail harness you'd need the part # A47PB. For the 2-1/2 inch amber lights you'd want the part # MCL59AB and for a grommet for this you'd need part # A55GB. For a pigtail for this you'd want part # A46PB. Then for 4-way wiring sold by the foot you'd want the part # 16-4B-1.
    view full answer...
  • Are the Optronics Uni-Lite Mini LED Clearance Lights DOT Rated as a Reflector
    The Uni-Lite Mini LED Side Marker and Clearance Lights, like part # MCL11AKB and # MCL11RKB, are not rated as reflectors. We do have a couple of options that you might consider. Check out the 2-1/2 inch Round LED Trailer Clearance, Side Marker Light with Reflector, # MCL59AB and # MCL59RB. I added links to the parts needed to complete the installation of these lights for you.
    view full answer...
  • Replacement Lens Availability for Reflect-O-Lite SAE-P-P1-68
    Unfortunately we do not have any replacement lenses for your Reflect-O-Lite lights. There may be some out there somewhere but the only solution we have for you would be to replace all of your lights. If you end up wanting to do this I can help you with replacement lights but it may be worth seeing if somewhere else has replacement lenses.
    view full answer...
  • Replacement Taillights, Wiring and 7-Way Connector for Car Hauler
    To fit the round 4-1/2 inch holes on your trailer for the rear brake lights you could use the # STL42RB as this will fit in that hole. For a pigtail harness you would also need # A45PB. For the side clearance lights you would need to enlarge the holes to 3 inch in diameter, use the # A55GB as a grommet and then use # MCL59AB for the lights and # A46PB as a wiring harness. For a replacement 7-way with 8 feet of wire for running new wire everywhere you would want the part # H20046....
    view full answer...

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Info for this part was:

Updated by:
Adele M
Updated by:
Brian T
Installed by:
Cole B

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