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Optronics Trailer Clearance and Side Marker Light - Submersible - Rectangle - Amber Lens

Optronics Trailer Clearance and Side Marker Light - Submersible - Rectangle - Amber Lens

Item # A91AB
Our Price: $9.09
You Save: 58%
Trailer Lights
Shipping Weight: 0.06 lbs
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2-1/2" x 1-3/16" x 7/8". Waterproof, incandescent trailer light functions as a clearance or side marker trailer light. Durable polycarbonate lens. Multiple mounting and wiring options (sold separately). PC rated. Great Prices for the best trailer lights from Optronics. Optronics Trailer Clearance and Side Marker Light - Submersible - Rectangle - Amber Lens part number A91AB can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (349)
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Optronics Trailer Lights - A91AB

  • Clearance Lights
  • Rectangle
  • Incandescent 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" x 7/8". Waterproof, incandescent trailer light functions as a clearance or side marker trailer light. Durable polycarbonate lens. Multiple mounting and wiring options (sold separately). PC rated.


  • Rectangular trailer light can function as both a clearance light and a side marker light when properly mounted
  • Sonically sealed, polycarbonate housing and lens are waterproof
  • Incandescent bulb provides dependable light
  • Durable polycarbonate housing and lens
  • Amber lens over incandescent bulb
  • Compatible with 12V DC systems
  • Multiple mounting options
    • Surface mounts with base (A91BB or A91CB - sold separately)
    • Flush mount with grommet (A91GB - sold separately)
  • Accepts standard 2-prong plug (A46PB or A86PB - sold separately)
    • Also accepts single wire pigtail (A91LW - sold separately)
  • PC rated


  • Quantity: 1 clearance/marker light
  • Overall dimensions: 2-1/2" long x 1-3/16" wide x 7/8" deep
  • Bulb type: incandescent
  • Power draw at 12.8V: 0.2 amps
  • 3-Year warranty

Optronics Trailer A91 Series Clearance and SAide Marker Incandescent Light Diagram

Manufacturer Cross Reference
Light will work as an exact replacement for:
Uni Bond # SE1225A
Wesbar # 203367
Truck Lite # 15200Y
Grote # 46413
Peterson # M150A
Bargman # 40-37-002

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.

A91AB Optronics Amber Sealed Rectangular Incandescent Marker and Clearance Light - Submersible - Incandescent - PC Rated

Alternate part number: A-91AB

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Optronics Trailer Clearance and Side Marker Light - Submersible - Rectangle - Amber Lens - A91AB

Average Customer Rating:  4.9 out of 5 stars   (349 Customer Reviews)

2-1/2" x 1-3/16" x 7/8". Waterproof, incandescent trailer light functions as a clearance or side marker trailer light. Durable polycarbonate lens. Multiple mounting and wiring options (sold separately). PC rated.


Exact fit for my 2007 Tracker boat trailer. Plug and play application. eTrailer shipped in a timely matter and the technical assistance was a big help. I would have bought locally but they did not have any in stock. They weren't sure how soon more would come in either. It's a small Mom & Pop outfit only so it was to be expected.


The service was fast and the light was delivered very quick. I installed the light and it works great.



It is working great.


Like the movie Field of Dreams, build it and they will come. Meaning, do your job and do it right. No need to ask customer to write reviews but since you asked...

It is what it is. Overpriced Cheap plastic with nothing included to attach them... Nice work people! Just a little suggestion, if you offer reasonably priced products that are slightly above average in quality you wouldn't need your ask your customers to write reviews. But I thought I would give you my 2 cents and remember this is not a debate.



They asked me to wright the review and now they want me to write another on a year later. I have to wonder if they thought I was going to change my mind. The lights are still CHEAP OVERPRICED PLASTIC.


Always carry a spare of these. Yellow, red and tail/stop. Had to replace the yellow this week while on the road. So will be ordering another.



After a year still have not had to replace the one installed last year. Nice and waterproof.


These running lights work great. I use them on my boat trailer which is exposed to a lot of salt water. No problems, for they are a sealed light. For the price I bought extras but haven't had to use them. It's been about a year now.


I purchased this light assembly and a rubber grommet to replace the right marker light on my Karavan trailer. It fit perfectly and had the proper 2 pin connector. Ordering was easy and it arrived promptly.


Light was an identical replacement. No issues, great service and fast service. Will buy again from etrailer if I have to again.



Theyve been working great. Hardest part was finding out the proper part number from the trailer manufacturer to order the right one. The products are still working great.


Perfect replacement part.


Exactly what I needed for my boat trail er.


Works as expected on the trailer for my Ranger boat.

Steve T.


Still working, no problems.


Was able to talk to a person about my needs. Great service. The part I received was in a timely manner and works great.


Purchased an amber side marker light for my bot trailer. Installed easily and works fine.



Still works well and is an exact match forthe original that came with the trailer


Needed to replace my clearance lights on my boat trailer. Talked to Steve at etrailer about mixing LED lights with Incandescent lights and was advised that it was not a good idea. Installed all four lights in 30 minutes, tested and ready to go back fishing.



The lights are still working fine. I originally replaced my burned out lights with LED lights and found that by doing so and not changing my main running light that are incandescent the lights would continue to burn out. Now that I put incandescent side lights on I seemed to have fixed the problem.


Fit perfectly


Right part, quick delivery


I purchased the A91AB amber side marker along with a right angle pigtail for my cargo trailer and they were a perfect match. The pictures and website made it easy to find exactly what I needed for the job.
The price was great and shipping was quick. I will definitely be using etrailer again next time!

Mark S.


The product is still working great.


My product was a trailer tail light from OPTRONICS, it is a quality light and easy to install. My main review concerns E-TRAILER, they are a top quality distributor. The representatives are professional an very knowledgeable. Their follow- up is excellent. I have ordered many times from them and they are the best!!!!

Eddie S.


Thanks for your follow up, working as expected. Thank you again, No problems at all.


They were exactly what that were supposed to be.


Perfect fit and fast delivery


This light appears to be the right size and I will see if it works on my trailer when I hook it up. The item was delivered in a timely manner and the business seems to be very polite and friendly.

Albert J.


The light has functioned just fine. Thank you for checking.


Summer of 2019 I rewired my boat trailer after 17+ years of non-use. I chose Optronics trailer lights because they were sealed and submersible.I no longer have to unplug my trailer before launching my boat. I am very pleased with the products so far.


ordered side marker lights for my boat trailer--E Trailer had what I needed--lights arrived in two days as shown on web site--notified me when they were shipped and followed up all the way--exceptional service all the way--will definitely use them again--product was quality pieces and price was fair--installed them and all is well--thanks E Trailer for a great job !!!!!


Great company with great service!


I managed to smash a trailer clearance light on practically my maiden trip with a new boat and trailer. After thinking I could find one around somewhere (but never did), I went searching on the web. I found the exact items (light and mounting bracket) here, making replacement a snap.


I took a chance and bought this marker light to replace Triton 05545. Turned out it was a match and I'm very happy because the cost was a third of paying for a pair of Triton 05545. It fitted Triton 05061 Rectangle 2.5 Inch Clearance Sidemarker Light Grommet as well. Thanks etrailer.

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