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Tail Light for Trailers Over 80" Wide - 7 Function - Incandescent - Square - Passenger Side

Tail Light for Trailers Over 80" Wide - 7 Function - Incandescent - Square - Passenger Side

Item # ST2RB
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Our Price: $12.76
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Shipping Weight: 0.55 lbs
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Optronics Stop/Turn/Tail,Side Marker,Rear Clearance,Side Reflector,Rear Reflector Trailer Lights - ST2RB
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6-1/8" x 4-9/16". Incandescent light acts as brake, tail, turn, side marker, side reflector, rear clearance, and rear reflector for trailers wider than 80". Stud mount. Quick connect wiring. 2 bulbs. Lowest Prices for the best trailer lights from Optronics. Tail Light for Trailers Over 80" Wide - 7 Function - Incandescent - Square - Passenger Side part number ST2RB can be ordered online at or call 1-833-496-1390 for expert service.
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  • Reviews (118)
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Optronics Trailer Lights - ST2RB

  • Tail Lights
  • Square
  • Incandescent Light
  • Red
  • 6L x 4-1/2W Inch
  • Surface Mount
  • Stop/Turn/Tail
  • Side Marker
  • Rear Clearance
  • Side Reflector
  • Rear Reflector
  • Non-Submersible Lights
  • Optronics

6-1/8" x 4-9/16". Incandescent light acts as brake, tail, turn, side marker, side reflector, rear clearance, and rear reflector for trailers wider than 80". Stud mount. Quick connect wiring. 2 bulbs.


  • Square trailer light serves 7 functions for trailers more than 80" wide
    • Stop, Turn, Tail, Rear Clearance, Rear Reflex, Side Marker, and Side Reflex
  • Built-in reflector removes the need for a separate reflector
  • Incandescent bulbs are easy to replace
  • Shockproof socket protects bulbs against damage
  • Durable plastic housing with screw-on lens
  • Red lens covers incandescent bulbs
  • Compatible with 12V DC systems
  • Stud mount to trailer with included studs
  • Quick connect wiring - simply insert stripped wire into holes for a secure connection
    • Light grounds through mounting studs
  • DOT compliant


  • Configuration: passenger side
    • Driver side: ST3RB (sold separately)
  • Dimensions: 6-1/8" long x 4-9/16" tall x 2-7/8" thick
  • Distance between mounting studs (center on center): 2"
  • Bulb type; 1157
  • Number of bulbs: 2
  • Power draw at 12.8V:
    • Stop/turn: 2.5 amps
    • Tail: 1.0 amps
  • 3-Year warranty

Manufacturer Cross Reference
Light will work as an exact replacement for:
Uni Bond # TL4440
Wesbar # 423062
Peterson # M444

Optronics ST2 Series Universal Tail Light Dimensions

Combination Lights for Trailers Over 80" Wide

Flatbed trailer over 80" wide with combination tail lights

If a trailer is 80" or wider at its widest point, then it requires rear clearance lights in addition to basic trailer lights. These clearance lights indicate the width of the trailer when it is viewed from the back.

To meet these requirements on a flatbed utility trailer where the bed extends past the wheels, you can install combination trailer lights that include the rear clearance function. For proper mounting, the lights must be installed at the widest points on the rear of the trailer - one on each corner.

ST2RB Optronics Combination Tail Light for Trailers Over 80" Wide - 7 Function - Incandescent - Square - Passenger Side - Right Hand

Alternate part number: ST-2RB

California residents: click here

Customer Reviews

Tail Light for Trailers Over 80" Wide - 7 Function - Incandescent - Square - Passenger Side - ST2RB

Average Customer Rating:  4.8 out of 5 stars   (118 Customer Reviews)

6-1/8" x 4-9/16". Incandescent light acts as brake, tail, turn, side marker, side reflector, rear clearance, and rear reflector for trailers wider than 80". Stud mount. Quick connect wiring. 2 bulbs.


This right tail light fit PERFECTLY on my Diamond C 12' utility trailer. It was exactly what we broke when we backed into an obstacle and was easy to install.
This webs was easy to use as well - the only problem was (if you can call it a problem) is that there were so many choices and it was a little difficult to choose the right part for the job.


Not good Carol the lens arrived cracked. I'm in closing a photo.

Thank you for bringing this to our attention. Our customer service team should be reaching out to you in the near future!
-- Etrailer Expert Brooke M - 09/03/2021


I received my order in a timely manner. The quality was everything I expected. I will again order boat products from your company again in the future.


Perfect replacement for my damaged tail ight.


i ordered my trailer lights and they shipped them that day and i was back on the road legally with in a couple of days and this product was the exact factory part that came with my trailer. thank you etrailer.this is where i will buy my factory parts from .


Just as described.


fit exactly as needed


The product, ST2RB trailer taillight, works as advertised; which is good. I backed into a tree that jumped in my way while turning around on our farm. Since the trailer has to be inspected to register, I have to repair the taillight. After searching the Internet for a replacement, I found etrailer had the correct part and I was fortunate they also have great service. I recommend this part AND this company for great customer service and rapid response to get me the product quickly. Thank you etrailer.

The product, ST2RB, trailer tail light is still going strong. Happy I worked with etrailer to replace my broken tail light. The light is on a 20’ trailer and I do not use it that much anymore but I can take it on the road if I need too!
Charlie - 02/08/2019


The perfect replacement tail light for my trailer!


Easy to find parts


It was easy to find the item I wanted and it arrived quickly.


no instructions.
There were no wires
coming out of the unit to attach to the existing trailer wires.
I took off the cover and saw that it is quite a poor design.
it's really no wonder why they are only $6.
When I went on your site to look at the "instructions" in the link you have.
I got this message:
"The instructions you requested are not currently available from the manufacturer.
We apologize for any inconvenience"
I got only ONE light wired with some head scratching and soldering.

Hopefully you'll do better next time.
Everything you've sent me to date has been excellent.
But... :(

The lamps install using the spring terminals on the rear of the lamp. Simply the stripped wires into the square holes, as mentioned in the video linked above.
-- Etrailer Expert Mike L - 10/23/2018


Perfect fit as a replacement tail light. Packaging was phenomenal and the light was wrapped in plastic to protect it in shipping. The ordering ease and service provided by etrailer were world-class. I highly recommend their products & services.

Thanks for the follow up. Im very satisfied with the trailer light.
George W - 01/05/2015


Great website, great customer service, had a slight issue which they resolved immediately... Don't hesitate, these folks are the best!!!


Easy transaction. I like that the Customer service followed up with a delivery notification message.


Like the add says "Great Products at a low price"! Very satisfied with my order and quick shipment!

Still going strong! Great product!!!
William J - 04/20/2021


I needed a replacement tail light for my trailer after accidently breaking it and found just what I needed at The online purchase was extremely simple and at a fair price. I also appreciated the fact that the shipping cost was also reasonable unlike other companies that seem to up the cost to make an additional profit.


Exact replacement


This light is very high quality. It fits and functions perfectly.


I was pleased to find that this tail light had the push-in wire connectors, thus installation was very simple. The price, including shipping, was not greatly different than that of a big box store where the product was not the Peterson brand and required wiring connectors.


Great Website to navigate through which has an excellent selection. Very competative prices. User friendly when placing order. Item comes packaged well and arrives when promised.

I highly recommend etrailer.


Product is working fine just as explained. Very satisfied and will consider etrailer for all my future needs. High recommendationThanks
Frank - 08/18/2014


Just need the side part , that’s okay, I will have the other, if need, I was also it came with the bulbs


Very good tracking provided.


[cheap] crap but when you break the oem that's what you use


Optronics products are always very good quality and value. They're just not fence proof!

E trailer always has good prices and quick shipping. Together good product and good service, what more could you want.

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • Trailer Lights Go Out When Headlights Are On
    It sounds like you could have more than one issue on your trailer but the most prevalent is a weak ground or so it seems. I recommend that you start by checking both the trailer side and vehicle side connector, by check I mean you should remove each of them, sand down the surface and then reattach with new mounting hardware. A visual inspection of the ground terminal is not sufficient to check for function. I would also run a jumper wire on the ground circuit from each tail light up to...
    view full answer...
  • Replacement Optronics Side Marker Lens Cover
    The Replacement Side Marker Lens # A2RB will simply need a screw that fits the 1/4" diameter hole and is longer than 1-1/4", so the choice is yours as there is no recommended hardware. Based on the photo you provided, I do recommend replacing the entire # ST2RB fixture because the plastic housing is pretty clearly damaged. Either way I'm sure your friend will appreciate your gesture.
    view full answer...
    Image 1 for
  • Can a Side Marker Trailer light be Wired to Come On with the Blinker
    If you want to make a side marker light blink with the turn signal it will have to be tapped into the turn signal/brake light wire for that side. But then it will also come on with the brake lights. And you would not want to also attach it to the running light circuit because it would back feed and lights would come on when they should not. Trailers are made with what is called a 2 wire system. They have combined turn signals and brake lights and the running light circuit is separate. In...
    view full answer...
  • Availability of Replacement Side Marker Lens For Trailer Light PM440
    You might look at Optronics Replacement Side Marker Lens, part # A2RB. This side marker lens is the same length and width as the Peterson Replacement Lens, part # 55-15R, you have referenced, but is 1-1/2 inches tall. The # A2RB lens will fit on a trailer light like the Optronics Square Trailer Tail Light, part # ST2RB.
    view full answer...
  • Can LED Trailer Taillight Kit TLL160RK Replace Incandescent Square Trailer Lights
    Theres no reason you couldn't upgrade your square incandescent lights to the rectangle LED trailer light kit part # TLL160RK that you referenced. LED trailer lights are a great option as they basically last forever and only draw a fraction of amperage when compared to incandescent bulbs.
    view full answer...
  • Replacement Light Bulb For Optronics Square Trailer Tail Light # ST2RB
    The standard light bulbs in the # ST2RB light is part # A1157B. This bulb features 8.3 watts for the tail light function and 26.9 watts for the turn and brake light function.
    view full answer...
  • Troubleshooting Function of Additional Trailer Side Marker/Signal Lights
    The problem you're having with your new wiring could be related to the ground, especially since it sounds like you may have added more lights than were originally on the trailer. It often happens that weird behavior from trailer lights results from a loose, corroded or insufficient ground connection. First make sure that each individual light's ground is made to clean bare metal. Some lights like # TLL12RK use a wired ground (white wire with ring terminal) while others like # ST52AA ground...
    view full answer...

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    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
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    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
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    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Adele M
Updated by:
Adele M
Employee Laura H
Updated by:
Laura H
Employee Brian T
Updated by:
Brian T
Employee Dustin K
Video Edited:
Dustin K
Employee Cole B
Installed by:
Cole B
Employee Randy B
Installed by:
Randy B
Employee Zach D
Video by:
Zach D

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