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Optronics LED Clearance or Side Marker Light w/ Reflex Reflector - Submersible - 8 Diodes - Red Lens

Optronics LED Clearance or Side Marker Light w/ Reflex Reflector - Submersible - 8 Diodes - Red Lens

Item # MCL59RB
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2-1/2" Diameter round. Waterproof, LED trailer light serves as either a side marker light or clearance light. Built-in reflex reflector. Durable polycarbonate housing and lens. Multiple mounting options. Accepts standard 2-prong plug. P2 rated. Great Prices for the best trailer lights from Optronics. Optronics LED Clearance or Side Marker Light w/ Reflex Reflector - Submersible - 8 Diodes - Red Lens part number MCL59RB can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (80)
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Optronics Trailer Lights - MCL59RB

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

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


  • Round LED trailer light functions as a clearance light or side marker light 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
  • Red lens over white LEDs
  • Compatible with 12V DC systems
  • Multiple mounting options
    • Surface mount with open-back or self-grounding bracket (sold separately)
    • Recessed mount with grommet (A55GB - sold separately)
  • Accepts industry standard 2-prong plug
  • 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 # 10208R

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.

MCL59RB Optronics LED Clearance or Side Marker Trailer Light w/ Reflex Reflector - Submersible - 8 Diodes - Round - Red Lens - P2 Rated

Alternate part number: MCL-59RB

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Optronics LED Clearance or Side Marker Light w/ Reflex Reflector - Submersible - 8 Diodes - Red Lens - MCL59RB

Average Customer Rating:  4.9 out of 5 stars   (80 Customer Reviews)

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


Installed in just a few seconds and is a perfect fit for my boat trailer.


I ordered these parts to replace some broken/corroded lights/wiring on my 10-year-old Triton snowmobile trailer. I pulled the old parts from the trailer, checked the make and serial numbers and E-Trailer had them. Factory replacement parts that fit, just like the originals.


These were the perfect light to use on the flatbed of my 1969 Chevy farm truck. The matching pigtails that were recommended were a little difficult to snap on to the back, but I don't know if that was a problem with the light housing or the pigtails. Once they were fully plugged in, they worked great (and weren't coming loose).


Perfect fit... Easy to install..


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.


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


These LED lights are the best. You spend a little more than the regular ones but it is worth.


LED's fit right in place of old incandescent lights


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


Great product exactly what we ordered to match what's on trailer! Shipping was very fast






Works great! Easy install


Great product! Works perfectly and should last a very long time. Shipping was also very fast and cheap. Actually arrived sooner than expected! Highly recommend this company and this product!


Great product and upgrade to my old lights...great shipping...will buy more parts from this company!!!


Fit perfect very bright and seem to be holding up very well


A very good price, for the quality in this light. Was a very good purchase. Have other things on order, also. LLM


All the products I have purchased have been good quality and service has been top notch.


Just what i was looking for


They are exactly what I needed and they are very bright!


A great upgrade. Easier to see.


Haven't installed them yet and may be a couple of weeks before o do, but service was excellent.


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


Product as advertised and quick service.


So far so good,


Have not attempted to submerge the lights yet but have no doubt that they will perform just fine.

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • 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...
    Image 1 for
  • Replacement LED Marker Lights for Floe Pro 100 14 Foot Snowmobile Trailer
    From all the photos I saw online, it looks like Floe used grommet mounted 2-1/2 inch marker lights and standard 6-1/2 by 2-1/2 inch oblong taillights. If that's the case, for the amber 2-1/2 inch I would recommend # MCL59AB and # MCL59RB for the red marker light. The lamps use a standard # A55GB grommet to mount. The grommet is a fit for a 3 inch diameter rough opening. The lamps are designed to be used with a 2 pin pigtail like part # A49PB. I wasn't able to find a photo showing the...
    view full answer...
  • Mounting Bracket and Grommet for Optronics MCL59RB Trailer Clearance/Market Light
    The Optronics # MCL59RB LED clearance/marker light you referred to is indeed compatible with the # BK55BB bracket. The lamp has diameter measurement of 2-1/2 inches and the bracket has an inner diameter of 2-3/4 inches. You'll need a grommet, part # A55GB which take up the difference in diameter between the lamp and the opening of the bracket for a snug fit. You'll also need the wiring pigtail, part # A46PB.
    view full answer...
  • Recessed Clearance Lights and Wiring For a Dump Trunk Bump Bed
    It sounds like you have three of the Optronics 2-1/2" LED Clearance Lights # MCL59RB held in place with the Rubber Grommet # A57GB and two of the Optronics 2" LED Trailer Clearance Lights # MCL55RB with the 2" Grommet # A54GB. If this is what you have all the lights use the 2-Wire Pigtail # A86PB and can be wired in using whatever length of wire is needed. We do have the Bonded 4 Wire # 16-4B-1 sold per foot that you can break into 2 wire strips for each side and connect using Butt Connectors...
    view full answer...
  • Recommended Trailer 2-1/2 Inch Clearance Light and Grommet
    The closest grommet we carry to your 2-11/16 inches hole is the Optronics # A57GB. This is made to fit into a 2-25/32 inch opening which is going to be extremely close. Being that it's rubber I would imagine you could make it work even if you have to file out the hole ever so slightly. For a 2-1/2 inch submersible LED light the Optronics # MCL59RB will pair well with the 2-Wire Pigtail # A46PB.
    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 inches...
    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...
  • 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 Red, Round Side Marker Light for a 2010 Triton Trailer
    The SAE AP2 98 on the lens indicates the lens rating but it isn't a part number. Light # MCL59RB is 2-1/2 inches in diameter and takes grommet # A55GB and harness # A46PB. But none of the clearance lights we have that are round and 2-1/2 inches have the same lens rating.
    view full answer...
  • 2-1/2 Inch Diameter Red Round Trailer Clearance Light with Reflective Housing
    I do have a similar clearance light for you with a reflective housing but the Trailer Clearance or Side Marker Light part # MC56RB does not. Instead, you will want to take a look at the Trailer Clearance or Side Marker Light part # MCL59RB for LED or part # MC57RB incandescent. Unfortunately, these lights are only available with a recessed mount part # A55GB. You are also going to need to use the pigtail part # A46PB.
    view full answer...
  • Replacement LED Trailer Clearance Light for 2001 Floe Versa Max Snowmobile Trailer
    I pulled up some pictures of your 2001 Floe Versa Max Snowmobile trailer and it looks like the clearance lights are 2-1/2 inch diameter grommet mounted lights like the: -Optronics LED Clearance Light part # MCL59RB I wasn't able to verify the size though so you might measure yours to be sure. We also have 2 inch LED light kits like the part # MCL-55RK but I am pretty sure what you have is larger than that.
    view full answer...
  • 2-1/2" Round Trailer Lights that are Recessed Mounted and Rubber Grommet for 2-3/4" Hole
    Yes, the Rubber Grommet for 2-1/2" Round Trailer Lights - Recessed Mount, # A57GB requires a 2-3/4" diameter cutout for installation and allows you to use a recessed mounted 2-1/2" diameter sealed light such as the LED Trailer Clearance or Side Marker Light, # MCL59AB or # MCL59RB.
    view full answer...
  • Availability of a 2 Inch Diameter LED Trailer Light
    We currently don't stock a 2 inch that is 11/16 inch deep. The closest we have are two and a half inch and 11/16 inch deep LED red lights: # MCL59RB # MCL57RB Another very close option would be Optronics GloLight LED # MCL155RB. It's 2 inch diameter and 3/4 inch deep. You may need # A46PB two wire pigtail for sealed trailer clearance, side marker lights.
    view full answer...
  • LED 2-1/2 inch Diameter Clearance Lights for Snowmobile Trailer that Install in Grommet
    The red Optronics LED clearance light part # MCL59RB is 2-1/2 inches in diameter and designed to fit in grommets. For amber then you'd want the part # MCL59AB and you'd be set. These are very reliable and have reflectors built into them as well. If you needed grommets you'd want the part # A55GB and for right angle pig tail harnesses part # A46PB.
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Patrick B
Video Edited:
Patrick B
Employee Dustin K
Video Edited:
Dustin K
Employee Chad S
Video Edited:
Chad S
Employee Kathleen M
Installed by:
Kathleen M
Employee David F
Installed by:
David F
Employee Laura H
Updated by:
Laura H
Employee Brian T
Updated by:
Brian T

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