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Optronics LED Trailer Clearance and Side Marker Light - Submersible - 14 Diodes - Amber Lens

Optronics LED Trailer Clearance and Side Marker Light - Submersible - 14 Diodes - Amber Lens

Item # MCL49AB
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Optronics Clearance Lights - MCL49AB
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3-7/8" x 2" Rectangle. Waterproof, LED trailer light serves as either a clearance or side marker light. Durable polycarbonate housing and lens. Surface mount to trailer - hardware not included. 2-Wire design. PC rated. Lowest Prices for the best trailer lights from Optronics. Optronics LED Trailer Clearance and Side Marker Light - Submersible - 14 Diodes - Amber Lens part number MCL49AB can be ordered online at or call 1-636-306-4830 for expert service.
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  • Reviews (65)
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Optronics Trailer Lights - MCL49AB

  • Clearance Lights
  • Rectangle
  • LED Light
  • Amber
  • 4L x 2W Inch
  • Surface Mount
  • Rear Clearance
  • Side Marker
  • Submersible Lights
  • Optronics

3-7/8" x 2" Rectangle. Waterproof, LED trailer light serves as either a clearance or side marker light. Durable polycarbonate housing and lens. Surface mount to trailer - hardware not included. 2-Wire design. PC rated.


  • Rectangular LED trailer light functions as a clearance light or a side marker when properly mounted
  • 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
  • Surface mounts to trailer - hardware not included
  • 2-Wire design includes power lead and ground wire
  • DOT compliant
  • PC rated


  • Dimensions: 3-7/8" long x 2" wide x 1" thick
  • Distance between mounting holes (center on center): 3"
  • Diodes: 14
  • Power draw at 12.8V: 0.131 amps
  • Lifetime warranty on LEDs

Optronics MCL49 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.

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.

MCL49AB Optronics LED Trailer Clearance and Side Marker Light - Submersible - 14 Diodes - Rectangle - Amber Lens - PC Rated

Alternate part number: MCL-49AB

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Optronics LED Trailer Clearance and Side Marker Light - Submersible - 14 Diodes - Amber Lens - MCL49AB

Average Customer Rating:  4.8 out of 5 stars   (65 Customer Reviews)

3-7/8" x 2" Rectangle. Waterproof, LED trailer light serves as either a clearance or side marker light. Durable polycarbonate housing and lens. Surface mount to trailer - hardware not included. 2-Wire design. PC rated.


Once again, your shipping department failed to properly package these to prevent them from banging around against each other in the box.
This nonsense is getting really old. Nearly every time I order these lights they aren't properly packed. The only time an order does get packed properly is the order I place AFTER I complain about your crappy packing. THe order following my complaint order is properly packed, then the shipping department once again forgets how to properly pack stuff on all subsequent orders. A box of read lights was sitting on top of the amber lights as they traveled 1500 miles across the US. THe amber were missing their protective bag.
PLEASE, stop shipping my orders via UPS Sure POST. THe postal service takes over delivery and delays the package by 1-2 days. Ship UPS ONLY!

I will have our Customer Service team reach out to you.
-- Etrailer Expert Jenny N - 03/18/2022

by: 10/28/2022

Product is awesome, but as you can see by the photos, etrailer shipping staff still don't know how to properly package items to prevent them from banging around against each other while bouncing down the highway in the back of a truck while traveling 1500 miles across the US. I've brought this to their attention multiple times and the problem still hasn't been fixed.
There was NO packing material in this box.


Really bright!!!! Well made. Bought 2. Buying 2 more. #texassquarebodies


Very good experience and nice selection. Spent the winter restoring boat trailer. etrailer had spring eye bushings, shackle bolts, u-bolts and hub seals. Then topped it off with new LED lights. couldn’t be happier. Even had to exchange some lights because I ordered wrong size, no problem.


These are a perfect upgrade on my jet ski trailer. They were easy to install and are twice as bright as the old ones. I recommend them.

They are still working well and could not be happier. They are bright and a perfect upgrade. I had the marker lights go out briefly but only due to a dirty ground. Other than that, perfection! Thanks for following up! That’s ideal customer service.
Erin - 05/19/2018


Here are pictures of the LED tail lights and marker lights that I installed after refurbish this 20' gooseneck trailer.


Very very bright & a sharp orange color. My second pair I just bought.


Replaced 2 within a year. Would work then go off and turn back on. Almost like it got hot and turned off to cool

You mentioned that had to replace 2 of them within a year and I wanted to ask a few questions. Have you checked the ground on the lights? Did you have to replace the lights that were purchased from us? Do you still have them?
-- Etrailer Expert Jenny N - 05/24/2022
Wiring was fine. I did replace them. I bought extra for spares. No I did not hold on to them. If another goes out Ill have another. Camping season upon us.
-- comment by: Conrad - 05/24/2022
The lights do have a limited warranty on the LED lights.
-- Etrailer Expert Jenny N - 05/24/2022


Exactly what I needed and very quick delivery. Already installed and works perfectly.


Decided to put these on the tongue of pontoon trailer. Helps you see the steps to get into the boat better.


I needed to replace the original marker lights, which were these. I did not want to drill other holes for different style of lights. Original lights were new in 2007 on a boat trailer. It is in fresh and salt water. One light failed this year the other had only 6 leds still working. The failed one was 2/3 full of water, upon checking it no water would shake out of it. Unknown how water got in. It would be nice if everything would last forever but, on a boat trailer things do fail. I travel with the lights on during most towing. With the bouncing of the travel and being in/out of water, I consider 8 years OK for their life. Price is great. Easy to replace, 20 mins for both.

Just tested the trailers lights for the fishing season. All of the LEDS are working, no water was gotten into them as of this point.
ken - 06/01/2016


First light flickered. Etrailer sent another right away. All working great and bright.


I refurbished my 5x10 Utility Trailer & I decided to change out the old Incandescent Lights to LED and I couldn’t be happier. These were good quality at a great price & they work great. Mounting holes were the same too which made installation easy.


I recently ordered lights to replace
the original lights on my neighbor’s 20 year old DewEze Jay Bed and I couldn’t be happier with the entire process!
Everything arrived quickly and in perfect shape with plenty of cushioning to prevent damage.
The combination tail lights are simply perfect for the application and the reverse lights are BRIGHT!
I actually prefer these surface mounted tail lights over the gasketed style that is currently on my flatbed trailer.
In the future I will be ordering several sets of these to replace the lights on the trailer and for a flatbed that will be going on my own truck, I’m planning on using two sets in the truck’s flatbed with one set on the headache rack using the reverse lights as bed lights, I shouldn’t have any problems seeing stuff on the bed at night.


These look like they are going to work very well on the side of our RV. I was very impressed with how fast they arrived and I'd be glad to do business at again!

I am still very happy with the lights I bought from your company. If I replace or add lights in the future Id sure be glad to come back and purchase more just like or very similar to these.
Jim N - 08/05/2016


Nice sealed Light. LEDs are seen CLEARLY at any angle from 180 degrees because of some forward/reverse pointed LEDs which provides unusual effect not achieved by incandescent versions. Note that there is no grounding through the mounting screws or on the rear surface in any form - the ground wire MUST be hooked up. Also there is no wire clearance built into the housing so the wires MUST pass through the mounting surface (via a hole) on the backside. Last, the mounting hole is all plastic so do not overtighten - use of locking screws/nuts would be a good idea.


LED light is well made. Mounted two on each side of our coach to act as midship turn signals. Older incandescent lights at night are not really an issue but I needed "attention getters" in the daytime and these lights have rear and forward facing LEDS which greatly improve visibility. Use these for your midship marker/turn indicators - you will not be disappointed. Additionally, I find ETrailer to be very professional, always offering many products with plenty of assistance to support your installation.


Super bright easy installation!


Trailer side markers have been good so far.. i like etrailer as they always have a great selection...better than amazon as you never know if you will get used stuff..


This is my second order from etrailer, both orders were quick, easy online orders. The LED marker lights are very bright in the daylight making it easy for people to see my RV changing lanes and at night it makes my RV very easy to see. Great product and great website to order from.


Great bright LED marker lamps

Great lights, waterproof, and highly visible at night and in the daytime.
James - 04/12/2021


Very well built lights that are nice and bright. I haven't had a chance to back my jetski trailer into the water yet but I'm optimistic that these lights will survive just fine.


There's a lot of lights out there like this one. This is one of the good ones. No hardware included but it can be used in lots of applications and a couple of screws are cheap. Totally waterproof, sturdy, and bright.

Great Lights
momule - 10/29/2016


Perfect choice for my boat trailer.

After a year of boating and soaking the lights under water while launching my fishing boat. The LED taillights held up pretty good. The LED will probably outlast my trailer.
Henry - 05/29/2014


New customer and two orders placed so far with Talk about responsive! Also had exactly what I needed. Thanks to all of you for jobs well done and for a great inventory of products.

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • Recommended Amber LED Side Marker Light That Is Submersible
    We do not have an amber side marker LED light that is submersible and has a reflectorized lens. The light I recommend is part # MCL49AB. This light measures 3-7/8 inches long x 2 inches wide W x 1 inch deep. This light has 14 LEDs, and is submersible. This light does not have a reflective lens.
    view full answer...
  • Mounting of Optronics Sealed Rectangular LED Trailer Clearance and Side Marker Light # MCL49AB
    The Optronics Sealed Rectangular LED Trailer Clearance and Side Marker Light you referenced, part # MCL49AB is surface mounted, meaning that it is attached directly to the trailer frame. A bezel or bracket is not needed.
    view full answer...
  • Replacement Amber Colored Running Lights Needed for Boat Trailer
    I have included a link to all of our amber colored, submersible, rectangular running lights for you. The Optronics, # MCL49AB, is going to be the closest replacement that I have measuring 3-7/8 inch wide x 2 inches tall with mounting holes 3 inches on center.
    view full answer...
    Image 1 for
  • Can Optronics LED Clearance Light be Used as Turn Signal
    The Optronics LED Light # MCL49AB will work as a turn signal if wired properly.
    view full answer...
  • Availability of Amber Side Marker Trailer Light, # MCL49AB, In Red
    The Sealed, Rectangular LED Trailer Clearance and Side Marker Light, 14 Diodes - Amber, # MCL49AB is indeed available in red with part # MCL49RB. This is an identical light to the Optronics assembly you mentioned but it features a red lens. The light itself measures 3-7/8 inches long, 2 inches wide, and 1 inch deep. I have attached a short video demonstration on this product that you can also take a look at.
    view full answer...
  • Is Optronics Rectangular LED Trailer Clearance Light # MCL49AB Available with Red Lens
    Optronics does now offer an exact equivalent red version of the # MCL49AB amber clearance light you referenced, part # MCL49RB. If you want to view only Optronics products you can use the filters on the page to narrow the results by brand, mounting type, size etc.
    view full answer...
  • High Quality Trailer Clearance Light Recommendation that Only has a Single Power Wire
    The Optronics clearance light part # MCL95AB is what you are looking for. It's relatively cheap, LED so it will last a very long time, installs easily, and only has one wire for power of it.
    view full answer...
  • Dimensions of Sealed, Rectangular LED Trailer Clearance and Side Marker Light MCL49AB
    The dimensions of the Sealed, Rectangular LED Trailer Clearance and Side Marker Light, # MCL49AB, are 3-7/8 inches long, 2 inches wide, and 1 inch deep. The closest lights we have that fit those dimensions are the Sealed, Miro-Flex, Star LED Marker/Clearance/ID Light, Chrome Cover, 2 Wire, 4 Diode - Amber, # MCL19AB, and the Rectangular LED Trailer Clearance, Side Marker Light, 4 Diode - Amber, # MCL76AB. Neither are exactly 5 inch by 2 inch but they are both very close.
    view full answer...
  • Recommended Submersible Amber Trailer Clearance Light
    The Peterson Amber Oblong Clearance Light, part # 425200 is not submersible because the back of the light housing is not sealed and would allow water in, but we do have a light that would work for you. I recommend the Optronics Sealed, Rectangular LED Trailer Clearance and Side Marker Light, part # MCL49AB. This light has 14 diodes and is a surface mount. This light measures 3-7/8 inches long x 2 inches wide and 1 inch deep and has mounting holes that are 3 inches center-to-center. I...
    view full answer...
  • Recommendation for Sealed Clearance Lights to Replace Corroded Assemblies on Trailer
    To replace your existing Optronics # MCL44RB and # MCL44AB1 Clearance Lights with sealed alternatives, I recommend taking a look at the Optronics Sealed LED Trailer Clearance Light - Amber # MCL49AB and Red # MCL49RB. These feature a bit of a different shape than the standard rectangle of your existing assemblies, but they do have very similar dimensions, along with the same 3 inch mounting hole measurement. The lights themselves measure 3-7/8 inches long, 2 inches wide, and 1 inch deep....
    view full answer...
    Image 1 for Image 2 for
  • Available LED-Type Horse Trailer Rectangular Side Marker Lights
    The link provided will show you all available rectangular LED-type trailer clearance lights. Most of these do have fewer than 12 LEDs per light. We do offer the Optronics Double Bullseye LED Trailer Clearance and Side Marker Light # MCL45AB which has 10 diodes and an amber lens; we also offer a red lens version, part # MCL45RB. We also offer a 14-LED amber light, part # MCL49AB. If your existing lights have a part number printed on the back of the housing or molded into the lens/base...
    view full answer...
  • Is railer Clearance and Side Marker Light, # MC66AB, Submersible
    The Trailer Clearance and Side Marker Light, # MC66AB, is not a submersible light. You will not want to put this light under water. A sealed light like # MCL49AB, would be the way to go. I have included a link to a video review of this light for you.
    view full answer...
  • Is a LED Upgrade Available to Replace the Rectangular Trailer Side Marker Light # MC32AB
    Optronics does make a LED light that is close to the same size as the, # MC32AB. Check out the Sealed, Rectangular LED Trailer Clearance and Side Marker Light, # MCL49AB. I have also provided a link to a video review showing this light in action. If this Light is not what you are looking for, I have provided a link to all of the LED, rectangle, amber clearance lights that we have at this time.
    view full answer...
  • Recommended Brightest Amber Clearance Light for 20 Foot Gooseneck Trailer
    An LED clearance light is going to provide the brightest light for your 20 foot gooseneck trailer. The brightest LED clearance light we currently offer is the Optronics Triangular LED Trailer Clearance and Side Marker Light # CBL22AB. This amber, triangular light provides 15 light-emitting diodes and is weather and corrosion resistant. For a rectangular clearance light, I recommend the Optronics Sealed, Rectangular LED Trailer Clearance Light # MCL49AB. This product has 14 light-emitting...
    view full answer...
  • Is Amber Side Marker Trailer Light, # MCL49AB, Available In Red
    The Sealed, Rectangular LED Trailer Clearance and Side Marker Light, 14 Diodes - Amber, # MCL49AB, is also available in red as # MCL49RB. We do have several red marker lights as well that are close in size and shape. Take a look at Rectangular LED Trailer Clearance, Side Marker Light with Reflector, 2 Wire, 6 Diode - Red, # MCL44RB and # MCL44RB1. These lights are 4 inches wide by 15/16 inches deep by 1-1/2 inches tall. If you need a specific replacement, look for a serial or model number...
    view full answer...
  • Does the Optronics Clearance Light # MCL49AB Come With a Mounting Gasket?
    The Optronics LED Trailer Clearance and Side Marker Light - Submersible - 14 Diodes - Amber Lens # MCL49AB is a sonically sealed trailer light and does not come with a mounting gasket as it is not needed. This light is completely submersible, so you can simply mount it with the 3 inch on center mounting holes but the mounting hardware is not included. I recommend using the Deka Heat Shrink Butt Connector - 22-18 Gauge - Nylon Insulation - Red - Qty 5 # DW05743-5 to keep moisture out of...
    view full answer...
  • Replacement Amber Clearance Light For Trailer with Existing 1 Inch Diameter Hole
    I have a solution for you, but the Optronics Sealed, Uni-Lite Mini LED Side Marker and Clearance Light # MCL11AKB that you referenced does not come in a larger size to fit the existing 1 inch diameter hole in your trailer. I do not recommend using the # MCL11AKB and filling the hole with sealant. I also do not recommend gluing the trailer clearance light to the trailer. The light should be installed as intended by the manufacturer. Some surface mount lights will ground through their mounting...
    view full answer...
  • Replacing Peterson PM130 Incandescent Trailer Lights with LED Versions
    I will be happy to help you find the right LED replacement lights for your horse trailer. Based on the information you have provided the amber LED replacement is # MCL76AB. The red version is # MCL76RB. Another option is to use Peterson lights # M353A and # M353R. Since lights can sometimes go through design changes the new lights may not have the exact same dimensions as the old lights so that would be why you see slight differences in the measurements between your old lights and these lights.
    view full answer...
  • Parts needed to Wire a Boat Trailer With Led Lights and a 4-Way Towed with a 2008 Toyota Tacoma
    To use the Optronics Trailer Lights, item # STL22CCRB, on your boat trailer you will need several parts. I will list them below. 2 each Optronics Trailer Lights, item # STL22CCRB 2 each Rubber Grommet for 6-1/2 inch Oval Trailer Tail Lights, item # A70GB 2 each Right Angle 3-Wire Pigtail for Sealed Trailer Stop, Turn and Tail Lights, item # A47PB 2 each Mount Bracket for 6-1/2 inch Oval Trailer Tail Light - Stainless Steel, item # 337LB1SS 1 each 35 ft. Wishbone 4-Way Trailer Wiring Harness...
    view full answer...

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