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Trailer Tail Light - Stop, Turn, Tail - Incandescent - Round - Red Lens - Passenger Side
(2695 reviews)
Price: $12.51
In Stock
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Trailer Tail Light - Stop, Turn, Tail - Incandescent - Round - Red Lens - Passenger Side
Part Number: ST24RB
In Stock
$12.51
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- All Info
- Reviews (2695)
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Optronics Trailer Lights - ST24RB
Highlights
- One Light, 3 Functions: Provides stop, turn, and tail light signals for safe towing.
- Simple 2-Wire Hookup: Power and ground connect easily for quick installation.
- Strong Plastic Housing: Snap-on red lens and shock-proof socket protect the bulb.
- Exact Stud Mount Fit: 2" stud spacing secures light firmly to trailer surface.
- Easy Bulb Swap: Uses common 2057 bulb for straightforward replacement.
- Road Ready Power Draw: Stop/turn 2.5 amps, tail 1.0 amp at 12.8 V ensures proper function.
Features to know about
Reliable Visibility in a Simple Round Design: Incandescent Stop/Turn/Tail Light
This 4-5/16" round Optronics light delivers all three functions—stop, turn, and tail—in one dependable unit. The red lens covers a single 2057 dual-intensity bulb that handles both bright brake signals and lower-intensity running light duty. It’s built for 12V DC systems and draws 2.5 amps for stop/turn and 1.0 amp for tail, giving you solid brightness and consistent visibility wherever you tow.
Built Tough for Everyday Use: Durable Plastic Housing with Shock-Proof Socket
Rough roads and vibration can break weak bulbs, but this light’s shock-proof socket helps protect the filament from damage. The housing is made of durable plastic, and the red snap-on lens keeps everything secure without tools. You get a sturdy light that stands up to the bumps, ruts, and weather that come with regular trailer use.
Straightforward Mounting: 2-Stud Surface Mount with Integrated Ground
Installation is quick thanks to the two included studs spaced 2" apart on center. The studs also act as the ground connection when mounted directly to a metal surface—no extra grounding wire needed in most setups. The 2-wire design keeps things simple: one lead for stop/turn, one for tail. If you’re mounting to something non-metallic, a quick jumper wire handles the ground.
Easy Maintenance When You Need It: Replaceable 2057 Bulb and Snap-On Lens
When bulb replacement time comes around, it couldn’t be simpler. The snap-on lens pops off easily for access, and the common 2057 incandescent bulb swaps out in seconds. No need to replace the whole assembly—just change the bulb and you’re ready to go again.
Exact Replacement Fit: Matches Common OEM Lights
If you’re replacing an older unit, this model lines up with existing holes and wiring from several standard lights. It’s a direct replacement for Uni Bond TL4402, Wesbar 3050, Truck Lite 80314R, Grote 50862, Peterson 428S, and Bargman 30-15-001. That means no drilling or adapter brackets—just mount it up, plug it in, and get back on the road.
Specs
Configuration
- Passenger side: ST24RB
- Driver side: ST25RB (sold separately)
Dimensions
- Diameter: 4-5/16"
- Thickness: 3-3/8"
- Distance between mounting studs (center on center): 2"
Electrical
- Bulb type: 2057
- Power draw at 12.8V (Stop/turn): 2.5 amps
- Power draw at 12.8V (Tail): 1.0 amps
- Voltage: 12V DC
Warranty
- Warranty period: 3-Year warranty
Manufacturer Cross Reference
- Uni Bond #: TL4402
- Wesbar #: 3050
- Truck Lite #: 80314R
- Grote #: 50862
- Peterson #: 428S
- Bargman #: 30-15-001
ST24RB Optronics Trailer Tail Light - Stop, Turn, Tail - Stud Mount - Round - Red Lens - Passenger Side - Right Hand
Alternate part number: ST-24RB
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews
4.8
2695 reviews
by:
Dave
09/10/2026
I have used etrailer a few times. Very helpful, good products, and quick delivery.
by:
Terry
08/14/2026
Perfect replacement
by:
Gordy H.
03/26/2017
Great, simple tail lights. An exact replacement for what they used in 1970 when they homebuilt the trailer. I wanted something that would fit in the tubes to protect them from the heat of the firebox and damage. A perfect set to make the BBQ Pit road legal again.
by:
Wayne
07/05/2026
I have not received them yet.
by:
Michael
05/09/2026
Worked great!
by:
James
05/15/2026
well packed and quickly shipped
by:
Jolene
10/01/2025
Super fast shipping. Would use again. Thanks
by:
Jeremy
05/12/2025
These lights worked amazing and were built better than other lights similar in size.
by:
Nancy K
08/15/2018
We purchased an old snowmobile trailer to adapt to a hauling trailer. The lights were long gone but the steel surrounds were still there. We were able to order the exact light fixtures that had been in the surrounds even with the right mounting bolts on the back.. Made for a quick clean installation.
by:
J.O. Latham
09/14/2016
This transaction has been - WITHOUT DOUBT - flawless. Lights are as advertised. Thanks for the service!
J.o. L.
9/14/2017
Still 100!
by:
Roland
09/22/2023
Delivery was very fast and the product is exactly as described. I've installed many trailer lights, but if someone new was ordering, it would have been nice to have some directions, like which color wire was for what!!
by:
Brannon
07/25/2022
Exactly what I was looking for. Fits perfectly in the holes of my old trailer. Only place I can find the round tail lights.
by:
Byron
04/05/2021
Great people, had problem with my order, e-mail them, and they fixed it just a little long on shipping would buy from them again
by:
Rick
09/24/2018
Great product and customer service. Pricing and shipping were awesome.
by:
Neal
05/18/2015
Your product prices are great, shipping costs were very reasonable, and your service was excellent. I got exactly what I ordered.
Thanks!!
Thanks!!
by:
Kale M
09/01/2017
These were hard to find but etrailer had just what I needed with incredible shipping and customer service.
by:
C. Zinter
10/29/2014
For the price you can' t the two tail lights I purchased. I received my order in a timely manner and am very satisfied. I will be recommending this company to my freinds.
by:
Craig K.
08/23/2019
Just what I was looking for. Came to me very quickly and was kept informed of tracking. Also asked a question of their experts and was answered very promptly.
by:
Darin T.
10/01/2014
Arrived in great condition and easy to replace. Could have gotten to me sooner, but I didn't pay for expedited shipping. Just spoiled on 2-Day Amazon Prime I guess.
by:
William
10/27/2024
Look nice and mounted easily. Only issue I had is the bulbs fit loosely in the socket, so they intermittently lose contact, causing them to burn out frequently. I tightened the sockets up by bending them with pliers and it seems better.
by:
Michael
11/30/2017
For the money, these work fine. Don't expect very a very durable product though. They are cheaply made, and looks like water can get in eventually. Fine for a rarely used trailer.
by:
Gary
11/16/2021
Wish i would have paid the extra and gotten the Metal Housing Tail Light. What i have is working well and should last.
by:
Brian
11/19/2017
Great little lights. They are bright and seem to be well made. The price was great and the shipping was quick and i even had them shipped economy.
by:
Wayne
03/30/2023
Worked great for my old trailer re wire project.
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See what our Experts say about this Optronics Trailer Lights
- Why is There a Driver and Passenger Round Optronics Trailer Tail/Stop/Turn LightThe Trailer Tail Light # ST24RB is labeled as the passenger side because the driver side option, part # ST25RB, has a clear section on the underside of the housing to illuminate a license plate on a bracket like part # LP10SB. If you already have a light dedicated to the license plate then you can definitely use 2 of the passenger side options for your trailer. Attached are some review videos for you to check out. These light assemblies ground through the mounting hardware and then you...
view full answer... - Replacement Trailer Tail Lights for River Drift Boat TrailerThe Peterson Round Trailer Tail Light, 2 Stud Mounting, Right Hand # 431800 and # 432000 or the 4-3/8" Round Trailer Tail Light, Stud Mount, 3-Function, Right Hand # ST24RB and # ST25RB are both the style you are seeking but are not submersible. They are good for weather, but not for launching a boat as you referenced. I have linked the page to your options for a round light that is submersible but they won't have the 2 stud mount your referenced.
view full answer...
- Does 7 Inch Round Transit Light, # ST90RB, Have Brake, Turn, and Tail Light FunctionsThe 7 Inch Round Transit Light, # ST90RB, is a 2-function light. This round red transit light is used as a stop and tail light when connected to combined stop/turn circuit. For stop, tail, and turn lights, you will need a 3-function light like # ST24RB.
view full answer... - Sealed LED Tail Lights on Trailer Do Not Illuminate But Incandescent Type Will WorkThe Optronics Submersible LED Trailer Light Kit, part # TLL9RK, provides a lifetime warranty on the the LEDs and features water-proof housings. This particular product uses two threaded stainless steel studs for mounting to your trailer and a 3-wire configuration for electrical connection to your trailer wiring. The light includes separate wires for ground (white wire), stop/turn signals (green and yellow wires) and running lights (carried on the brown wire). There are similar products...
view full answer... - How Do I Ground The ST24RB Tail LIght To My TrailerThe Trailer Tail Light - Stop, Turn, Tail - Incandescent - Round - Red Lens - Passenger Side, part # ST24RB, has studs that will screw into the frame of your trailer. Those studs will act as the ground for these lights. If the lights will not mount directly to the metal frame of your trailer, you will have to add a jumper wire to ground the lights. I have included a video demo link below.
view full answer... - Availability of Surface Mount 4" Round Trailer Taillight That Uses 2 Studs On Back To MountI have another option for you, but we do not have an LED light that mounts in the same fashion as the Trailer Tail Light - Stop, Turn, Tail - Incandescent - Round - Red Lens # ST24RB so you would not be able to install an LED light in the mount you have on your trailer. The only option would be to stick with an incandescent light like the # ST24RB. Since they are mounted inside of the can you can use two # ST24RB as you do not need the license plate light. I included a video of the #...
view full answer... - How Many Functions Can the 7 inch Round Transit Stop and Tail Light # ST90RB DoThis 7 inch Round Transit Stop and Tail Light # ST90RB can do stop and turn signals when used on a combined stop/turn circuit, but it cannot do taillight functions as well. The closest thing to a 7 inch 3 function trailer light we have is the 4-3/8 inch Round Trailer Tail Light, Stud Mount, 3-Function Trailer Light # ST24RB. However, this light is only 4-3/8 inches in diameter.
view full answer... - How Does the Replacement Lens for Optronics InstallYes, the Replacement Lens for Optronics # A24RB which is designed as a replacement for the Trailer Tail Light # ST24RB and # ST25RB does snap onto the tail light assembly.
view full answer... - 4 Inch Round Submersible Trailer Light RecommendationI have a solution for you, but the 4-3/8" Round Trailer Tail Light # ST24RB that you referenced is not submersible. The closest thing we have to what you referenced that is submersible would be the Red Flush Mounted Sealed Turn Signal # 435800.
view full answer... - What are the Wire Functions on an Optronics 3-Wire PigtailOn the Optronics 3-wire plugs the white is ground, red is turn signal/brake lights, and the black is for running lights. On your trailer green is likely the right turn signal/brake light wire, brown and tan are most likely running lights, and yellow is most likely left turn signal/brake lights. You will need to use a circuit tester such as # PTW2993 to test the wires on the trailer to confirm.
view full answer... - How Does the Optronics 3-Function Tail Light Provide 3 Functions if There are Only 2 WiresThe Round Trailer Tail Light # ST24RB grounds through the mounting studs so the two wires are all that is necessary for activating the stop/tail/turn signals of the light. The bulbs are dual intensity so each wire will control a different intensity of the bulb and then ground through the mounting studs. The stop/turn will be on one wire and the tail light will be on another. To determine if you need more lights at the rear of your vehicle you will need to consult your local laws and regulations....
view full answer...
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Info for this part was:
Expert Research:
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Expert Research:
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Updated by:
Adele M
Updated by:
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Updated by:
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Updated by:
Carrie F
Installed by:
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James D.
7/8/2026
Hey Wayne, Apologies for the delay, we'll be reaching out directly to assist.