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Thinline LED Clearance and Side Marker Light - Submersible - 3 Diodes - Rectangle - Amber

Thinline LED Clearance and Side Marker Light - Submersible - 3 Diodes - Rectangle - Amber

Item # AL91AB
Our Price: $10.09
Trailer Lights
Shipping Weight: 0.05 lbs
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2-1/2" x 1-3/16" Rectangle. Waterproof trailer light functions as both a clearance light and a side marker light when properly mounted. Requires mounting bracket and plug (both sold separately) for installation. Amber lens. PC rated. Great Prices for the best trailer lights from Optronics. Thinline LED Clearance and Side Marker Light - Submersible - 3 Diodes - Rectangle - Amber part number AL91AB can be ordered online at or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - AL91AB

  • Clearance Lights
  • Rectangle
  • LED Light
  • Amber
  • 2-1/2L x 1-3/16W Inch
  • Surface Mount
  • Rear Clearance
  • Side Marker
  • Submersible Lights
  • Optronics

2-1/2" x 1-3/16" Rectangle. Waterproof trailer light functions as both a clearance light and a side marker light when properly mounted. Requires mounting bracket and plug (both sold separately) for installation. Amber lens. PC rated.


  • Small, rectangular trailer light functions as both a clearance light and a side marker light 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
  • Polycarbonate lens and housing
  • Amber lens
  • Multiple mounting options
    • Surface mount with open-back or self-grounding bracket (sold separately)
    • Recessed mount with grommet (sold separately)
  • Accepts industry-standard 2-prong plug (sold separately)
    • Requires single-prong plug (sold separately) for installation with self-grounding bracket
  • DOT compliant
  • PC rated


  • Dimensions: 2-1/2" long x 1-3/16" wide x 7/8" deep
  • Diodes: 3
  • Power draw at 12.8 volts: 0.051 amps
  • Lifetime warranty on LEDs

Optronics light dimensions

Trailer light is a direct replacement for:

  • Uni Bond LED1225-3A
  • Truck Lite 15250Y
  • Grote 47083
  • Peterson M153A
  • Maxxima M20320Y

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 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 a side marker light.

AL91AB Optronics Thin Line Mini LED Side Marker/Clearance Trailer Taillight - PC Rated - Amber

Alternate part number: AL-91AB

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Thinline LED Clearance and Side Marker Light - Submersible - 3 Diodes - Rectangle - Amber - AL91AB

Average Customer Rating:  4.8 out of 5 stars   (1601 Customer Reviews)

2-1/2" x 1-3/16" Rectangle. Waterproof trailer light functions as both a clearance light and a side marker light when properly mounted. Requires mounting bracket and plug (both sold separately) for installation. Amber lens. PC rated.


Boat Trailer: Following a highly successful conversion of the brake/tail & DOT lights, I went ahead with changing the amber running/side maker lights. Working with Hally made ordering smooth and simple. The parts arrived via USPS as expected in excellent condition.
The new LEDs fit perfectly into the OEM housing, so I chose not to change them at this time. THe difference in illumination is just outstanding!!!
I will definitely use eTrailer again with two great experiences on this project.
Seeing the outcome, I cannot explain why it took me so long to decide to convert.



After a year and around 2500 miles, the lights continue to perform flawlessly. It was a good decision to convert to LEDs and I will not wait as long should there be a next time.


Exact replacement for 2008 Skeeter (easy loader) trailer





I have been more than pleased with the Optronics brand lights! These are no exception!

I, like others, am amazed at the brightness of the lights. They are a huge upgrade over my existing incandescent lamps!

I really like the way them mate with the mounting brackets and wire connectors. They snap into the brackets securely and can be removed. I also like the matching connectors as they also snap into place securely.

I would buy again and I would recommend to others as well!


Timely delivery. Plug and play fitment like original. Just what I needed. Working great after one year of use.


Perfect match to original incandescent and mating wiring. Waterproof and works great.


Easy to install and looks to be a exact replacement for the factory installed running lights on my boat trailer.

Stephen I.


Light is still working great, would buy again if the need arises.


Excellent service!
Parts ordered on Monday,
delivered on Wednesday!
So easy to replace the old bulbs.


Had yhe lights I needed for our Sundowner trailer and the price was reasonable. Quick shipping and a nice follow up. Would do business again.


The description was detailed and accurate. The price was reasonable along with great communication. I will shop again. Thank you!


Easy replacement. Very fast shipping. A bit pricey for 2 of these lights but overall I'm satisfied.


Worked great, replaced the old lights in my boat trailer and fit perfectly.


Much brighter light from all viewing angles than the OEM lights. Easy snap in replacement if it ever fails. The self grounding one-wire base would have made my install easier. The two prong plug I ordered was a tight fit but it worked.

I would recommend etrailer.


It looks really nice now with the Sealed, Mini Rectangular LED Trailer Clearance, Side Marker Light.


Works great, easy fix.


I am absolutely blown away by the customer service and quality of product from etrailor! I had an issue with delivery from my local USPS and etrailor did not even hesitate to take care of me far beyond what was expected! I would HIGHLY recommend doing business and I will be a lifelong customer!


Excellent product. Very pleased


worked perfect for some side lighting on the trailer.


Worked great. Exact replacement for what was on my trailer. Zero issues.


great customer service and the product is what I needed


I use these on my boat Trailer. They are easy to install and work well. Seem to be well sealed against water damage.



Still holding up well after a year of use. No problems.


The water proof light bulb works great


I'm very pleased with these LED replacement lights for the fenders on my cargo trailer.
Before these I had the regular light bulb which I had to replace from time to time. So the last time I needed to replace a bulb about a year ago I decided to go with these LEDs.
Wow what a difference in their brightness.
Before changing to LEDs my lights on the fenders were somewhat dim. Now with the LEDs these lights are bright enough for other divers to see them in the daylight giving me some peace of mind that they see me coming.
There is however one con to them being so bright.
When I have to back my trailer into the driveway at night their brightness blinds me from seeing my wife in back of the trailer guiding me in when using my review mirrors.
But it's OK because now I will just get some LED backup lights for the trailer.
I plan on changing the entire trailer over to LED lights, someday. lol
PS. I love

Scott F.


Its been a year of having these lights on my cargo trailer and Im still loving them. Nice and bright to warn other drivers either in front of me or in back of me the width of my trailer coming down the road. I run them day and night and 99 of all drivers coming head on at me I see they pull over just a little to widen the gap between us as we pass each other. I have a cargo trailer with fenders mounter outside the trailer with a little black plastic rubbery housing that holds the lights. I put the amber light facing forward and the red light facing backwards. Just take the black housing off the fender then pull out the old and install then new. Was a good time to clean up the ground wire connection while I was there too. Took 10 minutes or so per side. Theyre awesome. Getchya some here at etrailer.


Always quick and dependable service


Have not got them


Product fit and worked perfectly.

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • Replacement Rectangular Amber 2-1/2 Inch Long by 1-1/2 Inch Wide Clearance Lights
    The “SAE P2PC 98” you provided is a code used by the department of transformation and will not have any bearing on the correct replacement. In order to determine the correct replacement I would need you to either A) remove the lens and find the part number inscribed on the base or B) send me a dimensional photo of the light.
    view full answer...
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  • Replacement Marker Light for 2011 Tiffin Open Road Motorhome Mirror
    The # A91AB Optronics Trailer Clearance and Side Marker Light will work as a replacement for your current marker light. This has the same 2-1/2" x 1-3/16" dimensions as your current light and accepts the standard 2-prong plug which would be the the 2-pin connection you are describing. This has light has the same two tabs you mentioned on each end to fit in your mounting bracket. If you would like to replace both lights there is also an LED option which is the # AL91AB Thinline LED Clearance...
    view full answer...
  • Replacement Front Clearance Lights Needed for 1996 Tiffin Allegro
    It's kind of hard to tell exactly what lights will work for your 1996 Tiffin Allegro, but I think something like the 2-1/2" x 1-3/16" Thinline LED Clearance and Side Marker Light # AL91AB should do the trick. If your lights have different dimensions then I've linked our selection of replacement amber lights that you can filter through, or you can take some measurements and send those in with some close up pictures of the lights that I can use as a reference.
    view full answer...
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  • Why is Trailer Light Shorting
    Thank you for your purchase directly from etrailer of the Thinline LED Clearance and Side Marker Light # AL91AB, we appreciate that. The reason the light you purchased from us is shorting out is due to a bad ground, just like you said, touching the silver ring.
    view full answer...
  • How to Select Replacement Trailer Lights
    Trailer light part numbers are usually found on the base of the light, rather than on the light lens. If you can find a part number on the base you can search our site by entering that number into our search box. The codes on a lens are often DOT numbers rather than actual manufacturer part number. We do carry many brands of trailer lights, including lots of Optronics products, and the page I linked for you will let you select the type, size, brand and color of light you want. All you...
    view full answer...
  • Replacement for Truck-Lite Signal-Stat 1500 Clearance Light
    The Thinline LED Clearance and Side Marker Light part # AL91AB for amber or part # AL91RB for red will be direct replacement options for a Truck-Lite Signal-Stat 1500. It should allow you to use the existing bezel.
    view full answer...
  • What Does PC Rated Mean On The Optronics Trailer Lights, # AL82AB
    PC rated means that the light is viewable from a 90 degree angle. Most other lights are considered to be viewable from a 45 degree angle. On the Optronics Trailer Lights, # AL82AB, this light will function as both a clearance and side marker light if mounted at a 45 degree angle. Just mounting the light on the side of your over 80 inch wide trailer will not allow it to be both a clearance and side marker light, because the light will not be seen at the front or back of the vehicle. To...
    view full answer...
  • How Does the Flush Mount Grommet # A91GB Install a # AL91AB Light Into a Trailer
    All the parts you ordered are designed to work together, but the grommet part # A91GB is for flush mounting the Optronics Light part # AL82AB that you have. This grommet will get installed into a hole in on your trailer that is about 2-7/8 inches across and 1-1/2 inches tall. If you do not have a hole with those dimension you might be better served getting a Black Mounting Bracket # A91BOB to allow you to surface mount the # AL82AB.
    view full answer...
  • Side Marker Light that Fits 2018 EZ Loader Skeeter ZX250 Boat Trailer
    While we do have a great option for you, since we do not know the exact part number for your side-marker light on your EZ Loader boat trailer, we do not know the model that is the direct replacement. With that being said, most of the time it is much better to purchase a similar assembly altogether instead of searching for the exact replacement. For a great choice, I recommend the ThinLine Mini LED Side Marker Light # MCL-91AK. The light itself measures 2-1/2" wide x 1-3/16" tall x 7/8"...
    view full answer...
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  • Can the Optronics AL91AB Light Be Mounted Vertically
    Yes, you can mount this Optronics Trailer Light # AL91AB basically in any way you like as long as it visible. You will need to consult your local laws and regulations to determine which mounting positions are legal. I attached a review video for this product for you to check out also. You might also be interested in purchasing a Black Mounting Bracket # A91BOB to help you install the # AL91AB. I attached a review video for this product for you to check out also.
    view full answer...
  • LED Clearance Light Recommendation for Sundowner Horse Trailer
    What you have on your horse trailer is a pretty common clearance light that we do offer in red and amber as an LED. For the red you'd want the part # AL91RB and for amber part # AL91AB. You'll also need the grommet part # A91GB and the right angle pigtail part # A46PB and you'd be set.
    view full answer...
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  • Availability of Truck Lite Model 15 Light Base Replacement
    I looked up the Truck-Lite 15 light and found that it's basically the same as the Optronics Mini Thin Line clearance lights like the part # AL91AB. Which we have a black base part # A91BOB and a chrome base part # A91OB for but we do not have a white one.
    view full answer...
  • Replacement Tail and Marker Lights for 1996 Ranger Trail Boat Trailer
    Excellent idea, switching to LED. They use less power, last much longer and are brighter than incandescent lamps of the same size. Win, win, win. The grommet mount lamps you reference should fit in a 6-3/4 by 2-1/2 inch rough opening, which is the typical size. I'd recommend measuring the rough opening to confirm. If that dimension checks out, the # TLL12RK LED taillight kit would work well for you. For the marker lights, if the interior of their mounting brackets measure 2-1/2 by 1-3/16...
    view full answer...
  • Does The Optronics LED Side Marker Light # AL91AB have 2 Male Connector Posts
    Yes, The Thinline LED Clearance and Side Marker Light # AL91AB has 2 male connector posts on it. This waterproof trailer light functions as both a clearance light and a side marker light when properly mounted. It is 2-1/2 inches long by 1-3/16 inches wide by 7/8 inches deep. The Right Angle 2-wire pigtail # A46PB and The Mounting Bracket # A91BOB are sold separately. I attached a review video link below.
    view full answer...
  • Recommended Wiring and Bracket for an Optronics AL91AB
    We definitely have the wiring and brackets needed to get you up and running. With that being said, you will need the Right Angle 2-Wire Pigtail # A46PB and the Mounting Bracket for Optronics AL91 # A91BOB. The # AL91AB lights will snap into the # A91BOB and then the # A46PB will plug directly into the back.
    view full answer...
  • Replacement Clearance Taillight Solution for EZ Loader 250-032130
    I looked up your EZ Loader part number and it appears to be the same design as the part # AL91AB which for the matching grommet you'd then need the part # A91GB. You'll also need the wiring harness # A46PB.
    view full answer...
  • Incandescent Trailer Clearance Light that Uses 2 Wires
    In red you'd want the part # AL91RB or in amber you'd want # AL91AB for the submersible incandescent lights. For a two wire harness like you need you'd want the part # A46PB with grommet part # A91GB or bracket # A91BOB.
    view full answer...
  • Upgrading To LED Trailer Lights For a Heritage Trailer Carrying 2003 Lund Fisherman Boat
    The Optronics LED Combination Trailer Tail Lights # TLL160RK will replace your tail lights for LED on your Heritage trailer. If you are able to remove the clearance lights from their bases we have the following Amber/Red lights below. Thinline LED Clearance and Side Marker Light Amber # AL91AB, Red # AL91RB Miro-Flex LED Clearance or Side Marker Light Amber # AL191AB, Red # AL191RB Thinline LED Mini Clearance and Side Marker Light Clear Lens Amber # AL91CAB, Red # AL90RCB
    view full answer...
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  • How to Determine if Amber Clearance Light Will Work on Trailer
    In order to determine if the Thinline LED Clearance and Side Marker Light # AL91AB will fit your trailer you simply need to measure your light and see if it matches; this light is 2-1/2" long x 1-3/16" wide x 7/8" deep. It is also a great option because it can be either recess or surface mounted. For a surface mount you will use Self-Grounding Mounting Bracket # A91BOB with Plug # A91LW. For a recess mount you will use Grommet # A91GB with Right Angle 2-Wire Pigtail # A46PB. I have added...
    view full answer...
  • Is the Peterson Clearance and Side Marker Trailer Light Offered with Female Terminals
    It sounds like you are looking for the Thinline LED Clearance and Side Marker Light part # AL91AB which has female terminals in the rear but a better option for you would be to just replace the pigtail with the Peterson Right Angle 2-Wire Marker Light Plug part # 153-49.
    view full answer...
  • Troubleshooting Trailer Wiring Blowing Fuses
    While we have no specifics on wiring for any make or model of trailer and can only generalize it does sound like something very simple - you have overloaded your running light circuits which is causing the fuse to blow, and the reason for that is almost always because you are using incandescent lights as opposed to LED lights. If this is the case, which I'm guessing it is because it is the most common, you will need to switch out at least your running lights to LEDs, and can do so cost-effectively...
    view full answer...
  • Will LED Clearance Light Work With One Wire
    Yes, the Thinline LED Clearance and Side Marker Light - Submersible # AL91AB will work with your single power wire, as it uses a 2-wire (one for power, one for ground) pigtail or 1-wire pigtail with a self-grounding bracket. To mount this light you have a couple options. The first is the Mounting Bracket # A91BOB with Right Angle 2-Wire Pigtail # A46PB; you'd also want to use the Self-Tapping Screw # 1131832. Your other option to mount this light is to use Self-Grounding Mounting Bracket...
    view full answer...
    Image 1 for
  • Is There a Difference Between the F008584-2 and the F008594-2
    Yes. The only difference between the Fulton # F008584-2 and the Fulton # F008594-2 is the color. Both of these step fenders are designed for 14" wheels. If you need mounting brackets you can use the Mounting Brackets for Trailer Fender - 13"/14"/15" Wheels - Galvanized Steel - Qty 2 # CE26098G-2 and you can add clearance lights on these fenders with the Thinline LED Clearance and Side Marker Light - Submersible - 3 Diodes - Rectangle - Amber # AL91AB (LED) or # A91AB (incandescent). I've...
    view full answer...
  • Replacement Fender Solution for 2005 Crestline Trailer
    I looked up the Shorelandr fender SK0329-01 and our closest option is the Fulton fender part # F008574 which measures 9-5/8" Wide x 42-5/8" long x 12-3/4" tall. To add clearance lights to this you'd need the part # AL91AB for amber lights, part # AL91RB for red, part # A46PB for pig tails, and for grommets # A91GB.
    view full answer...

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