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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
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Shipping Weight: 0.06 lbs
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 etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (267)
  • Q & A (22)
  • Photos
  • Why etrailer?

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 Reviews

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

Average Customer Rating:  4.9 out of 5 stars   (267 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.

- A91AB

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.

- A91AB

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

- A91AB

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

- A91AB

This is the only place I could find the lights I needed. Arrived quickly and work perfectly. Thanks

- A91AB

Before making my online order, I called etrailer for clarification on the parts and process of trailer light wiring. I had the pleasure of speaking with a gentleman named Arthur. He was very patient and professional. I did not know the technical name or part# of the wiring I wanted. He patiently worked with me online to find the item. Excellent service! Arthur is an outstanding representative for your company. I appreciate his efforts and your products.

- A91AB

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.

- A91AB

After receiving the totally wrong part, Josh ensured that I would receive the correct items the second time. The only thing I was apposed to was the cost of shipping. It was more than the item.

- A91AB

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.

- A91AB

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.

- A91AB

OEM replacement works great. Item was shipped quickly.

- A91AB

I have owned a Champion bass boat and trailer since 2001 so finding replacement parts can be challenging. We recently had a piece of retread laying on the interstate knock out a trailer light. I have been extremely happy to find etrailer.com and they have all of my trailer lights in stock and I did not have to leave the house to my nearest boat store which is a hour round trip. Also, I was not sure if they even had it in stock on a Sunday. Thank you!

- A91AB

The lights fit and functioned perfectly.

- A91AB

Good deal, product delivered quickly and as expected.

- A91AB

I bought some used wave runners on a shorelander trailer. one of the running lights was broken. Shorelander wanted a very high price for a replacement lense. bought this one from e trailer and it fit prefect.

- A91AB

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

- A91AB

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

- A91AB

I thought my original lights, like the A91AB on my 2007 Bass Tracker boat, were not working. So, I bought these to replace the old ones. Turned out I had bad connections with some original wire junctions and splices. Decided that while I was fixing the connections it was a probably a good time to use the A91AB lights anyway. They were an exact match and are nice and bright. I know I can always rely on etrailer.com for all my towing, trailer, and wiring needs.

- A91AB

Excellent product. Still going strong. Impressive international shipping ease.

- A91AB

great product and shipping was fast Tha nks

- A91AB

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

- A91AB

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

- A91AB


- A91AB

just as advertised! thanks much A+++

- A91AB

Perfect fit and the right wiring connection for my Karavan trailer

- A91AB

Easy install and still working.

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