Optronics Trailer Tail Light - Stop, Turn, Tail - Submersible - Incandescent - Round - Red Lens

Optronics Trailer Tail Light - Stop, Turn, Tail - Submersible - Incandescent - Round - Red Lens

Item # ST45RB

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ST45RB - Recessed Mount Optronics Trailer Lights
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  • Tail Lights
  • Round
  • Incandescent Light
  • Red
  • Recessed Mount
  • 4 Inch Diameter
  • Submersible Lights
  • Optronics
  • Stop/Turn/Tail
4-1/4" Diameter round. Waterproof trailer light functions as a stop, tail, and turn signal light when properly mounted. Shock-proof socket protects incandescent bulb. Flush mount with grommet (sold separately). Accepts 3-prong plug. Lowest Prices for the best trailer lights from Optronics. Optronics Trailer Tail Light - Stop, Turn, Tail - Submersible - Incandescent - Round - Red Lens part number ST45RB can be ordered online at etrailer.com or call 800-298-8924 for expert service.


  • All Info
  • Reviews (148)
  • Q & A (26)
  • Videos (1)
  • Photos
  • Why etrailer?

Optronics Trailer Lights - ST45RB

4-1/4" Diameter round. Waterproof trailer light functions as a stop, tail, and turn signal light when properly mounted. Shock-proof socket protects incandescent bulb. Flush mount with grommet (sold separately). Accepts 3-prong plug.


Features:

  • Red trailer light serves 3 functions when properly mounted
    • Stop light
    • Tail light
    • Turn signal light
  • Sonically sealed, waterproof housing and lens unit is submersible
  • Shock-proof socket protects the bulb
  • Durable polycarbonate lens and housing
  • Red lens
  • Flush mount with grommet (A45GB - sold separately)
  • Accepts industry standard 3-prong plug (A45PB or A47PB - both sold separately)
  • DOT compliant


Specs:

  • Overall dimensions: 4-1/4" diameter x 2-1/16" thick
  • Power draw at 12.8V:
    • Stop/turn: 2.4 amps
    • Tail: 0.49 amps
  • 3-Year warranty


Manufacturer Cross Reference
Light will work as an exact replacement for:

  • Uni Bond # SE4000R
  • Wesbar # 423541
  • Truck Lite # 40282R/40202R
  • Grote # 52922
  • Peterson # 426R
  • Bargman # 40-01-001

Optronics ST45 Series 4 Inch Round Tail Light

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.


Recessed-Mount Light

Recessed mount light

Recessed-mount trailer lights install underneath a housing or a grommet (A45GB - sold separately). These lights will extend into the mounting surface and require that a hole be cut into your trailer.



ST45RB Optronics Trailer Tail Light - Stop, Turn, Tail - Waterproof - Incandescent - 1 Bulb - Round - Red Lens

Alternate part number: ST-45RB






California residents: click here


Video of Optronics Trailer Tail Light - Stop, Turn, Tail - Submersible - Incandescent - Round - Red Lens


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Optronics Trailer Lights - Tail Lights - ST45RB Review

Today we are going to review part number ST45RB. This is the Optronics sealed four inch round trailer stop, turn and taillight. This is a flash mount light. This is sealed round combination stop, turn and taillight. This red light will measure 4-1/4 in diameter and the overall depth because it rounded. Its hard to measure but it will give you an overall depth of 2-1/16.

The lens and the housing are one unit. It is sonically sealed and water proof. This will provide protection to the heavy-duty long life incandescence bulb inside. The light does feature shockproof socket, which will guarantee long bulb life. This light will flash mount using a mounting inaudible which is sold separately and it will connect by using a industry standard three prong plug which is also sold separately and what we are going to do is give you an idea of the brightness of the bulb or the taillight.

Well plug in the three-prong connector and I have a power supply here. Well connect the ground, white to ground and the black will be the taillight. Itll give you an idea of the taillight brightness. Then well do the stop and turn. Theres the brightness of the stop and turn.

Then Im going to turn off the overhead lights to give you an idea of the brightness in the dark. This is the regular taillight function. That will be the stop and turn function. That should do it for part number ST45RB.


Customer Reviews

Optronics Trailer Tail Light - Stop, Turn, Tail - Submersible - Incandescent - Round - Red Lens - ST45RB

Average Customer Rating:  4.8 out of 5 stars   (148 Customer Reviews)

4-1/4" Diameter round. Waterproof trailer light functions as a stop, tail, and turn signal light when properly mounted. Shock-proof socket protects incandescent bulb. Flush mount with grommet (sold separately). Accepts 3-prong plug.

- ST45RB
by:

For the price I can hardly complain, but one of the two already lost it's parking/running light 2-3 months ago, and they've been installed less than a year. I use my lights maybe 10 min/day, only on early mornings on the way to work. I've also used the Peterson brand lights, but after replacing those multiple times for the brake lamps going out I decided I might as well try something cheaper if I was only going to get junk anyways. I guess I'll try LEDs next. 339443



- st45rb
by:

Optronics ST45RB is perfrect replacement for GLO-BRITE 9541. 151253



- ST45RB
by:

Hi guys, I'm usually the one answering reviews These guys are great! My client emailed the link & told me to order these for our horse trailers. They've held up, to the point, we're not even close to needing to replace them. We haul quite a bit. These lights have been tried & true, day & night. When you're hauling a lot of livestock, you want people that have no clue what that entails, to see your lights well before they get near your livestock ; these lights do the job perfect! We've outfitted 3 separate trailers with this company. We restored wires, lights, & pretty much everything along those lines ;from a 2 horse, to a large stock, & a gooseneck. All the parts come quickly, are all there, & work & fit great. What more can you ask for?! 517860



- ST45RB
by:

Great product fast delivery. Very happy 650449



- ST45RB
by:

Nice lights. Very easy to install in about 5 minutes. Very durable at a great price 604512



- ST45RB
by:

best product, fast delivered 599521



- ST45RB
by:

Love it! 596554



- ST45RB
by:

replacement lights arrived in a timely fashion. I was pleased with the cost of the item and how quickly it arrived. Thank you, Cary S. 581887



- ST45RB
by:

Great product at a great price! 563548



- ST45RB
by:

Just what I ordered in good shape and works great 558884



- ST45RB
by:

Great lights, very easy to install, perfect fit, great price and fast shipping. Couldn't ask for more than that. 549251



- ST45RB
by:

ETRAILER is a great company to do business with. I will definitely do business with ETRAILER again and also tell all our camping friends. 548368



- ST45RB
by:

Product as described 548292



- ST45RB
by:

OK for price 539307



- ST45RB
by:

Do you also sell the rubber seals? 527687


Comments

The rubber grommets for these lights are part # A45GB
Rubber Grommet for 4" Round Trailer Lights - PVC
$2.63
.

-- Heather A - 06/28/2018

40356

- ST45RB
by:

I always keep a couple of these on hand. They shipped fast and were the correct ones at a reasonable price. 503951



- ST45RB
by:

I have used etrailer before to fix lights on my old horse trailer. Info on the website gave me confidence I was ordering the right thing and the light came quickly and was exactly what I needed 489079



- ST45RB
by:

Good product at a fair price and fair shipping. The transaction was simple and smooth and the item was shipped fast. What more can you ask for? Totally happy with this company and will does business with them again. 481561



- ST45RB
by:

Great light. 479968



- ST45RB
by:

The lights look great fit right from China however great price. If I would have had opportunity to buy American made & paid 100% more I think I would have as they would have been about $4 pc. More. 474891



- ST45RB
by:

Fast shipping quality products Will be doing a lot more business with you 474184



- ST45RB
by:

Purchased to replace original equipment on my RV. That brand is apparently no longer made. It was a perfect fit and was such a good deal, I ordered 2 extra. 473650



- ST45RB
by:

Arrived on time, as expected from 5-star provider, thanks 472644



- ST45RB
by:

Exactly what I needed. Great price. Arrived early. Perfect. 468601



- ST45RB
by:

Purchased for our box truck. Worked exactly as advertised. Fast processing and shipping. Would purchase again. 465699



- ST45RB
by:

the lights fit perfectly to replace the old ones. thanks 465638



- ST45RB
by:

the lights fit perfectly to replace the old ones. thanks 465637



- ST45RB
by:

I am very happy with every part of my experience buying from etrailer.com. The customer service was excellent, the product was perfect and I could not find anything like it locally. I highly recommend this company. Best of all the price was far lower than anywhere else on the internet! Oh one more thing. They even hade demo videos of the product so I could see it in action! Icing on the cake! Thanks etrailer. 463062



- ST45RB
by:

Fit perfect. Easy install. Quick shipping. Will definitely use etrailer again. 461536



- ST45RB
by:

The lights arrived and work great. The price was very reasonable. Keep up the good work! 458126



- ST45RB
by:

Lamp fit as replacement. 457209



- ST45RB
by:

The lights were as advertised. 453952



- ST45RB
by:

Product is as expected and delivered on time. Great experience on line purchase. 453449



- ST45RB
by:

This product worked flawlessly. The price was very reasonable and I received it in a reasonable amount of time. I will definitely order from etrailer.com in the future. 450873



- ST45RB
by:

Works as inteneded 447161



- ST45RB
by:

Perfect replacement taillight. It was very reasonably priced as well. 445412



- ST45RB
by:

etrailer is the best online source for RV related parts. Can't beat their prices and service. The tail lights I got are perfect, well packaged, promptly shipped. I will always go to etrailer for RV parts. 440762



- ST45RB
by:

Product was delivered quickly and was exactly what I wanted. 436562



- ST45RB
by:

Very good quality and excellent low pri ce. 435711



- ST45RB
by:

Loose in grommet in bracket. 427464



- ST45RB
by:

the lights that i ordered require a plug to connect them. nothing in the advertisement let me know i needed the plug so here i am out the cost of the lights and still cannot finish my trailer. not worth returning and i was running out of time, so i went to the local retailer and bought a complete set. i have had great luck with etrailer in the past, but i guess this deal was just too good to be true. threw them in the trash. 425682



- ST45RB
by:

Fit good. 418765



- ST45RB
by:

After multiple internet searches they were the only ones that had the part I needed at a fair price. So after confirmed the first one worked, ordered extra so when the next light goes. 412965



- ST45RB
by:

Item ordered was received in a very timely manner. Packaging protected the item from breakage. Thanks etrailer.com! 411457



- ST45RB
by:

Quick service, great product 406549



- ST45RB
by:

Just installed it and it WORKS! Going to order a few more just to have as spares. 405387



- ST45RB
by:

Lights were delivered on time as promised, no problem with installation and they have been working very well for a year now 401899



- ST45RB
by:

This taillight was very difficult to find - it went on a tow dolly that I tow behind my motorhome. etrailer got it to me on time for a tour of the National Parks in Utah. It was difficult to install in the rubber grommet but once installed worked well the entire trip from GA and back! etrailer solved my problem and expeditiously! 400726



- ST45RB
by:

Order received as promised. Everything I ordered and only the promised delivery date. Very satisfied. 396140



- ST45RB
by:

looks good 387515


50
148
Show More Reviews

Ask the Experts about this Optronics Trailer Lights
Do you have a question about this Trailer Light?


  • Installing New Trailer Lights and Wiring on a Horse Trailer
  • There isn't a kit available for what you are looking for, but you can still piece everything together. For grommets to use with the # ST45RB you would want the part # A45GB and then for a pigtail you would want the part # A45PB. Often times, people will run the wires from a 7-way such as yours to a junction box like part # 38656. From there, they will run the standard wire colors to the trailer lights, brakes and battery. I have attached a photo that shows how this setup works in...
    view full answer...

  • Adding Lights to a Kuat Sherpa 2.0 Bike Rack on a 2015 Land Rover Evoque
  • There isn't anything specifically designed for lighting on a bike rack so you're going to have to be a little creative here. Since the Kuat Sherpa 2.0 # SH22G is aluminum and you don't want to drill into it (Understandably so) you'll need to find a way to mount lights to it. Zip ties, like you mentioned, are going to be your best option. Tying a light like # ST45RB would be difficult to find a surface but might work. You'll also need a 3-wire connector # A45PB per light. Then you'll...
    view full answer...

  • Replacement 4 Inch by 2 Inch Round Tail Light for a 2006 Damon Intruder RV
  • The closest match we have to your existing Glo-Brite taillight is the Sealed, 4 inch Round LED Trailer Stop, Turn and Tail Light, Flush Mount, 3-Function, 12 Super Diode, # STL23R-24B. It measures 4 inches in diameter and 1-15/16 inches deep. To install this light, you would also need Rubber Grommet for 4 inch Round Trailer Tail Lights, # A45GB, and Straight 3-Wire Pigtail for Sealed Trailer Stop, Turn and Tail Lights, # A45PB. Since this light is an LED, if you determine that it is...
    view full answer...

  • Replacement LED Trailer Tail Lights for a 2005 Gulfstream BT Cruiser
  • Optronics trailer tail light # ST45RB is potentially a fit for your trailer if the existing lights are one of the following: Uni Bond # SE4000R Wesbar # 423541 Truck Lite # 40282R/40202R Grote # 52922 Peterson # 426R Bargman # 40-01-001 This information is likely on the light housing somewhere on your existing lights. The 2 knobs on the back are not an issue since this light would mount in a hole in the trailer or in mounting bracket # BK45BB both using grommet # A45GB. If...
    view full answer...

  • Replacement Trailer Lights for Truck-Lite Products
  • Part 40282R3 refers to a Truck-Lite brand round red-lens light. We have the Optronics stop/turn/tail light # ST45RB which is a direct replacement. This light uses a 3-prong plug # A45PB and can mount using grommet # A45GB. Part 50-19200Y3 refers to a Truck-Lite brand rectangular amber clearance light. As a direct replacement we have Optronics # MC65AB.
    view full answer...

  • Troubleshooting Trailer Taillights Where Only One Side of Trailer Lights Work
  • First thing you should do at this point is test the 4-way of the wiring harness with a circuit tester part # PTW2993 for voltage on all of the right pins when the taillight signals are being applied. Just like in the video I attached. If the voltage checks out there but the trailer lights still don't function right then the problem is on the trailer wiring. That would mean that problem is either due to a ground issue or a short issue. Make sure that the trailer side connector are...
    view full answer...

  • Troubleshooting Stop/Turn Signal of a Optronics Light part # ST45RB on a Trailer
  • It sounds like the problem is in the wiring. If your light is a dual intensity light and both intensities are working with the running lights and brighter with the brake lights then the problem lies in the turn signal circuit most likely on your vehicle. You might test the trailer connector on your tow vehicle with a circuit tester like our part # PTW2993 like the video I attached shows to determine if the wiring of your vehicle is good. If the problem is in the vehicle wiring you will...
    view full answer...

  • 2 and 4 Inch Diameter Trailer Lights, Grommets, and Harnesses
  • I will be happy to help and give you some options. For 2 inch diameter red lights we have several options: # MC53RB (use grommet # A54GB and harness # A46PB) # MCL50RB (use grommet # A54GB and harness # A46PB) # MCL55RB (use grommet # A54GB and harness # A46PB) # MCL55R1224B (use grommet # A54GB and harness # A46PB) All in one option # MCL-50CRK # MCL155RB (use grommet # A54GB and harness # A46PB) For 2 inch diameter amber lights we also have several options: # MC53AB (use...
    view full answer...

  • Availability of Replacement Tail Light for Cargo Carrier Light Kit
  • Yes it is. Part # ST45RB is the Sealed, 4 inch Round Trailer Stop, Turn and Tail Light, Flush Mount, 3-Function and will replace your existing light.
    view full answer...

  • What Causes Dim Brake Lights on Yakima Rack and Roll Trailer
  • With a trailer that is made of aluminum, you can experience grounding issues. Since you indicated that the light appears to work for the functions, but is dim when applying the brakes, I think this may be the problem. Due to vibration when in use, the wires can become loose, causing varied issues. I would first make sure all of the wire connections are secure on the trailer. You might want to check the ground wire connections on the trailer. Make certain the ground wire (usually white)...
    view full answer...

  • Troubleshooting Light Not Working with the Cargo Carrier Light Kit # 52014
  • If you installed the Cargo Carrier Light Kit # 52014, which fits carriers # 52018F, # 52017, and # 52018, and all of the functions on one light are not working then it sounds like the problem is the light itself. If some of the functions worked on the light then I would say that you have a problem with the wiring somewhere. You can test the light by running a ground to the marked pin and then test the other 2 pins with a 12V power source. If you think that the wiring may be an issue...
    view full answer...

  • Is Peterson Red Round Replacement Lens # 420-15 Interchangeable with DZ 77-845 Tail Light
  • The Peterson Red Round Replacement Lens, # 420-15, is not interchangeable with the DZ 77-845 light that you referenced but I may have a solution. For just a bit more than the cost of a lens, you could replace the entire light assembly with the Sealed, 4" Round Trailer Stop, Turn and Tail Light, # ST45RB. 3-Wire Pigtail, # A45PB, and Rubber Grommet, # A45GB, would be needed in addition to the light. Unfortunately we do not offer a replacement lens that will work for your current light.
    view full answer...

  • Will Optronics Submersible Trailer Light ST6RB Work on Malone Kayak Trailer
  • The Submersible Trailer Stop, Turn, and Tail Light # ST6RB that you referenced is a great choice to replace the existing lights on your Malone Kayak Trailer. The light housing is designed to allow water to flow in and back out of the housing while being submerged. This light has 6 functions: stop, turn, tail, rear reflex, side marker, and side reflex, and will mount on studs with 2 inch centers. For the left-hand version of this light you will want # ST7RB. For a similarly sized light...
    view full answer...

  • How Does Trailer Light # ST45RB Mount into Mounting Bracket # BK45BB
  • I went out to the warehouse and pulled Optronics Trailer Light, # ST45RB. First, you will need to place the Rubber Grommet, # A45GB, into the mounting bracket, # BK45BB. Next, you will need to press the light until it is seated all the way in the bracket. This last step actually takes some strength as the light is held in place by the grommet. I had to use some lubricate to get the light to seat all the way in the mounting bracket. Once in place, the light will not come out unless it is...
    view full answer...

  • 4 Inch Round White Trailer Backup Lights Needed for a Quick Loader Trailer
  • Yes, we have the Sealed, 4 inch Round Trailer Back Up Light, # BU45CB, that has a clear lens and provides a white backup light. Along with the light you might also need a 4 inch round grommet, # A45GB, and a straight pigtail, # A45PB, or a right angle pigtail, # A47PB.
    view full answer...


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Info for this part was:

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Expert Research:
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Expert Research:
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Updated by:
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