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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
Our Price: $14.60
Trailer Lights
Shipping Weight: 0.53 lbs
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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. Great 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 1-800-940-8924 for expert service.
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  • Reviews (140)
  • Q & A (0)
  • Photos

Optronics Trailer Lights - ST2RB

  • Tail Lights
  • Square
  • Incandescent Light
  • Red
  • 6-1/8L x 4-9/16W Inch
  • Surface Mount
  • Rear Clearance
  • Rear Reflector
  • Side Marker
  • Side Reflector
  • Stop/Turn/Tail
  • 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 Satisfaction Score:

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   (140 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.


It was the right one! The first time. Just like the Doolittle original .


Great replacement for my broken tail light on my Quality trailer.


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

Etrailer Expert

Brooke M.


Thank you for bringing this to our attention. Our customer service team should be reaching out to you in the near future!


Website was easy to navigate, shipping was fast! Easy replacement for broken trailer light. Will buy from again.


Easy website process speedy delivery.


great, excellent packaging, perfect shi pping


Part was as described and received via USPS in three days


Just as I expected it to be, an Exact replacement. Fast shipping, well packaged.


Prompt and on time


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!


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... :(

Etrailer Expert

Mike L.


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.


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.


Perfect replacement and easy to install.


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.


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.

George W.


Thanks for the follow up. Im very satisfied with the trailer light.


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.


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 .


I replaced the broken tail lights on my fathers trailer. They should have been replaced years ago. I found these optronics lights for a very responsible price. They are identical to the original ones. Installation was quick and easy. They seem to be a good product. At this price, I will be purchasing them again when _ _ it happens.


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




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.


etrailer made the experience of replacing a set of trailer lights smooth and cost effective. Thank you etrailer. I worked in main frame information systems for thirty five years and I must say your user interface is perfect and your product is cost effective. Thanks again.


Exact replacement for my damaged trailer light assembly. Product came with bulbs installed. Great price. Fast shipping.


Ordered the product. It came without damage and it fit perfect for the application. Very satisfied.


Perfect replacement for my damaged tail ight.

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...
  • Can Incandescent and LED Bulbs Be Mixed To Stop Hyper-Flashing
    If you were to install the Optronics Incandescent Trailer Clearance and Side Marker Light part # MC65AB inline with the stop/turn signal lights on your trailer that could then allow the system to draw enough power to stop the hyper-flash but there would be no way for me to confirm this, you would just need to give it a try. Also, this is a single function light so it would blink with the turn signals and then stay illuminated when the brakes are depressed. If you can confirm the trailer...
    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...
  • Is There a Way to Gain Visibility on Side of Trailer
    If you want better visibility on the sides of your trailer the best solution is going to be an observation like the Furrion RV Observation Camera System # FOS05TASF with the side the clearance light camera kit part # FCE48TASL. This system allows you to see on either side of the trailer through the monitor when the running lights are on.
    view full answer...
  • Availability of Side Marker and Turn Signal Clearance Lights for Side of 5th Wheel Trailer
    We actually have a few different options for exactly what you are wanting to do. Just choose which one you want based off of the style of the light itself! Miro-Flex LED - # MCL48AB Optronics LED - # MCL32ATB Optronics LED Mid-Ship - # STL75AB GloLight LED Mid-Ship - # STL175AMFB Each of these options functions as a clearance light as well as a side marker light plus they are not recess mounted so they will stick out some. I have attached review videos that you can check out for each...
    view full answer...

Do you have a question about this Trailer Light?

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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