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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: $7.76
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Shipping Weight: 0.06 lbs
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A91AB - Rear Clearance,Side Marker Optronics Clearance Lights
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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. Lowest 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 1-833-496-1390 for expert service.
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  • Reviews (307)
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Optronics Trailer Lights - A91AB

  • Clearance Lights
  • Rectangle
  • Incandescent Light
  • Amber
  • 2-1/2L x 1W 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   (307 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.


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
Richard - 07/07/2022


Great product, etrailer is place to shop for most your trailer needs.


ETrailer has the best selection of parts and customer support!


My part was promptly shipped and i received it in a fair time. The part fit just right and is working properly. Thank you etrailer


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.


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.
Dean - 04/30/2019


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.


Good quality....exactly what I needed. I've purchased trailer lights and replacement grommets via etrailer. Always a good experience, quality products, excellent custom service.


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.


Very happy with the service and the product that I ordered getting harder to find incandescent light. Just happy that you still handle them


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


They are still working great one year later! Very worth it

Great we have no issues
Christal - 07/21/2022


Got it quick & perfect match


Item was exactly as described and fit p erfectly


Easy transaction. Fast Shipping.


Works as expected on the trailer for my Ranger boat.


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.


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.
Dale - 11/24/2018


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!

The product is still working great.
Mark S - 04/25/2018


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!!!!

Thanks for your follow up, working as expected. Thank you again, No problems at all.
Eddie S - 08/04/2015


I have a 15 yr old Stratos boat trailer, when I lost my side marker, I didn't think I'd be able to replace it. etrailer allowed me to easy find the EXACT replacement lamp, including the rubber grommet and pigtail. Customer photos were a great help.


Order was received in a short period of time.


Correct part, no hassle, great communication on order, and super fast shipping.


Great price, great item. Very bright and a perfect match!


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.

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