Optronics Transit Light - Stop, Tail - Incandescent - Round - Red Lens

Optronics Transit Light - Stop, Tail - Incandescent - Round - Red Lens

Item # ST90RB

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Optronics Trailer Lights - ST90RB
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Product Images

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Videos


  • Tail Lights
  • Round
  • Incandescent Light
  • Red
  • Surface Mount
  • 7 Inch Diameter
  • Non-Submersible Lights
  • Optronics
  • Stop/Turn/Tail
7-1/8" Diameter incandescent transit light acts as a brake and tail light. Durable steel housing. Screw-on lens. Surface mount - hardware not included. 2-Wire design. Lowest Prices for the best trailer lights from Optronics. Optronics Transit Light - Stop, Tail - Incandescent - Round - Red Lens part number ST90RB can be ordered online at etrailer.com or call 800-298-8924 for expert service.


  • All Info
  • Reviews (143)
  • Q & A (15)
  • Videos (1)
  • Photos
  • Why etrailer?

Optronics Trailer Lights - ST90RB

7-1/8" Diameter incandescent transit light acts as a brake and tail light. Durable steel housing. Screw-on lens. Surface mount - hardware not included. 2-Wire design.


Features:

  • Round trailer transit light serves 2 function
    • Stop and tail
  • Incandescent bulb is easy to replace
  • Durable steel housing
  • Red screw-on lens
  • Compatible with 12V DC systems
  • Surface mount - hardware not included
    • Included foam gasket helps create a weathertight seal
  • 2-Wire design includes power lead and ground wire


Specs:

  • Dimensions: 7-1/8" diameter x 2-3/16" thick
  • Distance between mounting holes (center on center): 6-1/4"
  • Bulb type: 1157
  • Power draw at 12.8V:
    • Stop: 2.4 amps
    • Tail: 0.5 amps
  • 3-Year warranty


dimensions of light



ST90RB Optronics Transit Light - Stop, Tail - Incandescent - Round - Red Lens

Alternate part number: ST-90RB






California residents: click here


Video of Optronics Transit Light - Stop, Tail - 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 - ST90RB Review

Today we're going to be reviewing part number ST90RB. This is the 7" Round Transit Stop and Tail Light. It is going to be a red light from Optronics. The red, round light is going to function as your stop and tail light. Now, when connected to a combined stop and turn circuit, this light can work for stop and turn functions. It's going to feature a gasket that is included to create a weathertight seal.

It's going to feature a replaceable lens and incandescent bulb. You're going to have your 2 wires here at the rear, exposed. These are going to be your power leads and the system's going to ground through the mounting hardware. Mounting hardware is going to be sold separately. It's got a surface mount with four holes. It's going to be 1, 2, 3, 4.

If we measure the distance, center on center, the distance between the two, it's going to measure 6 1/4". The holes are going to be 6 1/4" apart center on center through the center of the light. You're going to have four mounting holes. Going over the overall dimensions of the light, it's going to give us a diameter about 7 1/8" and a thickness of right around 2 3/16". We want to go ahead and connect it to our external power source that way we can show you what it looks like with power running to it in our overhead lights off. The red wire is going to be for our stop signal.

We're going to apply that, and then the black wire is just going to be the tail light function. Then we're going to go ahead and mount the white wire as a ground here on the rear on the back of the housing. You can see here it's going to bring through a nice consistent signal for the tail light function. Then when we apply the brakes, it's going to illuminate for an even brighter signal. Then again, if you have it connected to a combine stop and turn circuit then this light can work for stop and turn functions as well. That's going to do it for today's review of the 7" Round Transit Stop and Tail Light from Optronics. .


Customer Reviews

Optronics Transit Light - Stop, Tail - Incandescent - Round - Red Lens - ST90RB

Average Customer Rating:  4.9 out of 5 stars   (143 Customer Reviews)

7-1/8" Diameter incandescent transit light acts as a brake and tail light. Durable steel housing. Screw-on lens. Surface mount - hardware not included. 2-Wire design.

- ST90RB
by:

The product was used to replace existing tail lights on my vintage travel trailer that have become dull and faded. These "school bus" type tail lights have a 7-inch base the same size as the ones replaced but, the defusers light the full 7-inches and are more easily seen at a greater distance. A great product. 640859



- ST90RB
by:

Great product. Used on 1965 Beeline Ca mper. 520237


Comments

Product still looks and works great

Thomas m - 06/10/2019

56408

- ST90RB
by:

My order was received in a very timely fashion. We can't wait to get them on the camper and get on the road! 406397



- ST90RB
by:

Lights worked great! Thick padding on the back for a great seal to the camper. I'd recommend them! 571977



- ST90RB
by:

About the only replacement for an Autolamp 575. Mounting holes line up perfectly, but the foam gasket is not great for vintage use. I removed it and used putty tape. I also opened the lamp to find it had a ground connection that had been cut...very lame. I ended up adding my own internal ground wire to make sure I had a good ground rather than the marginal ground through the mounting screws. 309787



- ST90RB
by:

I bought 4 of these to replace the old non-working taillights on my 1967 Holiday Rambler camper. They were easy to install and were the exact same size as the old lights. 224905


Comments

Ive had these on my camper for a year now, and they still look and function like the day I got them. Since that time, I have painted the camper and replaced all of the marker lights. those were also purchased from etrailer. Installed new tires and wheels, and tongue jack. The camper looks like its brand new. Im glad I found etrailer. They have saved me a fortune restoring this old thing. I would love to add new pictures of my camper, but I dont see any option to do that.

muffins77 - 09/10/2016

20886

- ST90RB
by:

I installed these lights on my vintage 1964 Holiday Rambler, and was very happy with the final outcome. They wired into the existing electrical system, and were the exact same size as the original faded lights they replaced. Couldn't find replacement lenses for the original lights, so these were the next best thing. And they worked perfectly. 246975


Comments

I still own the coach and they are performing well. Thank you.

Russ - 02/10/2018

34472

- ST90RB
by:

Hi have been working on my 1964 Holiday Rambler project and was looking to replace the old 7 inch round tail lights,they where cracked and faded and had bad bulb sockets. I found these new 7 inch tail lights at etrailer.com and they are a grate looking replacement EZ install and a good price,shipping was fast always a plus in my book, Vary happy with my purchase. TY :) 702959



- ST90RB
by:

Omg i was so shocked at how it came. I wasnt expecting it for atleast a few more days. Woke up and it was outside. Very highly recomended seller! 702869



- ST90RB
by:

These light fixtures are simple and fit on the trailer well. The wires are long enough to actually use. I put LED bulbs in them and this is very bright. Good product. Good price. 675022



- ST90RB
by:

Just received the replacement lights and they are as advertised. I needed the large size to cover the 6 1/2" original lights mounting holes. I have not installed them yet, but they seem to be reasonably well made, unfortunately there is no clear lens on one for license plate illumination (I did know that prior to ordering them.) I think that they are a good buy and I would buy them again if needed. 667469



- ST90RB
by:

This light was an affordable and perfect product for our vintage camper fixer upper!! 643902



- ST90RB
by:

Exactly what I wanted for the back of c amper 641028



- ST90RB
by:

Tail lights arrived quickly, very satisfied with the quality of the lights. Thank You! 639979



- ST90RB
by:

I was surprised of the size and thank you for the speedy service 611892



- ST90RB
by:

I am very pleased to have these lights and get my vintage trailer back on the road. Your product was just what I needed and I am greatly appreciated to know you had the product. I plan to use your company in the future if needed. 610367



- ST90RB
by:

The light look and work great ! The size and design is so close to the original 1968 ones that you cannot tell the difference except for the lack of a clear lens area on the bottom for the license plate . All in all, You have fantastic product and a very fair price. My 1968 Aristocrat Land Commander thanks you very much ! 603896



- ST90RB
by:

Fast shipping. Great quality. Perfect size for our Shasta .. 586252



- ST90RB
by:

One year later the trailer lights work perfect.. Outstanding product at an exceptional price!!!! 580387



- ST90RB
by:

The 7" lights I bought for my 57 trailer turned out great My girlfriend loves them ,my friend said they look original Thanks 572874



- ST90RB
by:

Exactly what I ordered and easy to install. Looks great on my 1970 Forester camper! 570971



- ST90RB
by:

Exactly what I ordered. Fast shipping, and great service! 566856



- ST90RB
by:

Good price for 7” tail lights that will replace ones on my camper...service was quick and i am glad i found a outfit that has many camper parts that sometimes are hard to find 563972



- ST90RB
by:

This is a great product, very reasonable prices, quick to ship, I will keep using this company to buy from, thanks for your service,Gary D. 563043



- ST90RB
by:

Used as a 7" round taillight for a Freightliner FL 80 fire truck. Light fixture uses a standard Automotive bulb 1157. easy install, no problems. 560837



- ST90RB
by:

These tail lights replaced the broken original lights on my vintage camper perfectly! Exact size of the originals 556132



- ST90RB
by:

These lights fit perfectly in my vintage camper. The screw holes matched the previously drill holes and it was the exact size. 547544



- ST90RB
by:

Excellent product and exceeded my expec tations! 542000



- ST90RB
by:

Perfectly replaced the light assemblies on my '67 Holiday Trav'ler travel trailer. Easy installation and they are bright, even during the day. Note: the original lights grounded to the body, these lights have to be grounded to the frame. I've recommended them to many Holiday Traveler vintage trailer owners. They really do look nice! 529848



- ST90RB
by:

The lights were perfect as replacements for my 1971 trailer. I was pleasantly surprise to get them in only 4 days. They were also packaged appropriately, not overdone like some sites, but well protected. 526362



- ST90RB
by:

so this product seems to be pretty solid. I appreciated the videos with each product as well. I will definitely shop etrailer again 522348



- ST90RB
by:

perfect fit and outstand service, I will be back on your site for purchases in the future. 517502



- ST90RB
by:

Great place to puchase great parts at a very reasonable price, quick to ship, a pleasure to do business with. 516959



- ST90RB
by:

Great set of lights...very easy to install. Came with bulbs, which was nice...very well made...durable and look great! Very nice people to deal with. Great communication skills. 515940



- ST90RB
by:

I'm very pleased with the trailer lights I just received from etrailer; they are even nicer and more substantial than I had expected. Service was friendly, the order was accurately filled, and delivery was prompt. I will definitely buy from etrailer again. 491490


Comments

Better than I could have hoped for. The old lights on my travel trailer were dim and sometimes didnt work at all. The new ones are bright and always work. No more worries about being rear-ended.

Will - 04/01/2019

51321

- ST90RB
by:

I just received a pair of 7" round taillights for my 1969 Aristocrat 16 footer. The old ones were broken and had rusty connections. I am so pleased with my new ones from eTrailer. Not only were they priced fairly and shipped expediently, but looked great ! A very good sealing system and easy to rewire. Thanks etrailer for a great product ! 474197



- ST90RB
by:

The product was exactly what I needed and was just as advertised. A great price, very quick shipping, and excellent customer service. 466300


Comments

Still doing great!

Nancy T - 01/11/2019

48429

- ST90RB
by:

I was very pleased with the service and the product. The tail lights I ordered for my 1967 Aristocrat trailer look great. I will definitely use etrailer again! 449152



- ST90RB
by:

Product arrived well packaged and quickly. Exactly what I needed! Thx! 443891



- ST90RB
by:

I have looked all over for some lights like this. The quality is very good and the price was good! 437051



- ST90RB
by:

Love my new lights! Got them to replace the 7" originals on my vintage Nomad camper. They are perfect! 436388



- ST90RB
by:

Nice product, great price. Much heavier molded plastic than I thought they would be. Purchased for my 1967 Pathfinder Camper. Same 7" diameter as original cake light. Great fit! 435082



- ST90RB
by:

This was needed for our 1965 travel trailer. It is the same size as our original, and it works great. 433478



- ST90RB
by:

Had trouble finding these lights for my old bus ordered delivered in 2 days bus has good glasses again 433100



- ST90RB
by:

I am slowly rebuilding a 1955 Cadillac RV that was custom built by Hess and Eisenhardt. The original tail lights were long gone and I feared that finding replacements might be impossible. Apparently the standardized school bus tail lamp goes way back. These tail lights were exactly what I needed, they look great and they bolted right up. Delivery was almost overnight! 432862



- ST90RB
by:

Very happy with the service and the parts were a perfect fit--1965 Corsair 18' camper 429815



- ST90RB
by:

This is the only place to find taillights that are the original size for a 1965 Trailblazer! Thanks ETrailer!! 414498



- ST90RB
by:

Couldn't beat the price and service! Still working great. 369490


Comments

Great products at a great price. Still working great!

Glen F - 04/19/2018

37469

- ST90RB
by:

Lights arrived quickly and in excellent condition. Quality of product was as advertised. Easy to mount on back of camper for stop,turn and tail lights! 369249



- ST90RB
by:

Lights are a perfect replica of antique lights. 355040


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Ask the Experts about this Optronics Trailer Lights

Do you have a question about this Trailer Light?


  • Front Lights on Trailer Work But Rear Lights Don't Work and Get Hot
  • That definitely sounds like a ground issue. If your wires are hot and you are getting signals to the lights in front of them then you need to check your grounds. Not only do you have a main ground wire but each light itself will have a ground. Check to make sure that your grounds are secure and connected to a clean, bare-metal surface. If those look good then the only other thing would be some damaged wiring. Check from the working lights to the lights that don't work and look for any...
    view full answer...

  • Replacement Rear Stop/Turn/Tail/License Plate Combo Cake Light for 1968 Pathfinder Travel Trailer
  • Thank you for providing the photo of the 7-inch combination Stop/Turn/Tail/License Plate Combo Cake Light from your 1968 Pathfinder travel trailer. I was able to find photos and some comments on trailer owner forums regarding your 1968 Pathfinder trailer, but not any specific information regarding the manufacturer of the original light fixtures. Given the age of this venerable old trailer it is quite possible that the original manufacturer of the cake light is no longer in existence....
    view full answer...

  • Mounting Optronics Transit Light
  • The mounting hardware for the Optronics Transit Light # ST90RB does need to be locally sourced at a hardware store as it is not something we (or the manufacturer) has a available. I recommend just bringing the light along to the store with you to find the right hardware so you can mount it without issue.
    view full answer...

  • Replacement Taillight Options for 1967 Airstream Caravel Trailer
  • I have a solution for you, but we do not offer any vintage 575 lights. I was able to find that the 575 lights were round taillights that measured 7 inches in diameter. To replace your exisiting lights with those of the same diameter, we offer both incandescent and LED lights. Our most popular 7 inch diameter, round, red trailer taillight is the Optronics # ST90RB. This is an incandescent, sealed taillight. The three taillight options that come with LED lights are the Optronics #...
    view full answer...

  • Does 7 Inch Round Transit Light, # ST90RB, Have Brake, Turn, and Tail Light Functions
  • The 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...

  • Does Optronics Tail Light Lens A90RB Include a Clear Portion for a License Plate Light
  • This lens is meant to be used as a replacement to the Optronics tail light, part # ST90RB. It does not have a clear portion for a license plate light. You are looking for a light like Optronics part # ST9RB or part # STL9RB. You could also use Optronics part # ST17RB. I have linked to these parts below.
    view full answer...

  • How Many Functions Can the 7 inch Round Transit Stop and Tail Light # ST90RB Do
  • This 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...

  • Installing Optronics Round Transit Stop and Tail Light On 1965 Chief Little Arrow Camper
  • I am glad to hear this light will work for your vintage camper. Since there are many ways these lights can be mounted it would be really difficult to include the mounting hardware. I recommend checking out the hardware you have that your current lights are attached with and visiting a local hardware store to get the new hardware to attach the # ST90RB lights. The red wire is attached to the brake/turn signal wire and the black wire is attached to your running light wire. Since the...
    view full answer...

  • How Many ST-90RB Lights Come With One Part Number Order?
  • The 7" Round Transit Stop and Tail Light - Red # ST90RB come individually. You would need to order 2 for a matching pair.
    view full answer...

  • No Running Lights Using Round Transit Stop and Tail Light - Red
  • Optronics tail light # ST90RB is unique in that it is designed as a brake light and tail light whereas most trailer lights are brake/turn and tail lights. But it can functions as a brake/turn/tail light when the red wire is connected to the combined brake/turn signal wire on the trailer and the black wire is connected to the trailer running light wire. This light grounds through its mounting hardware. If the trailer has an aluminum frame, tilt bed, or folding tongue then running jumper...
    view full answer...

  • Troubleshooting New Trailer Tail Lights Turning Off When Bumped
  • If the Optronics 7" Round Stop and Tail Lights # ST90RB that you recently installed on your trailer are turning off and on when touched then this likely indicates a weak connection somewhere on the assembly, either with the power wires or the actual mounting hardware. First make sure both the black (tail light) and red (stop light) wires are securely connected to the trailer wiring. If the wiring looks good then you can turn your attention to the mounting hardware/screws. This particular...
    view full answer...

  • Diameter of Lens A90RB
  • The lens diameter of part # A90RB is 7-1/8 inches. It is meant to fit part # ST90RB lights.
    view full answer...

  • How Many Lights Are Included with Optronics 7 Inch Round Transit Stop and Tail Light # ST90RB
  • The Optronics 7 Inch Round Transit Stop and Tail Light # ST90RB referenced in your question includes one light assembly. They are not available in a set, so you will just need to order two. This is a really nice, round tail light that measures 7-1/8 inches in diameter and has a depth of 2-3/16 inches. The gasket is included to create the weathertight seal and the light will ground through its mounting hardware. I have attached a short video demonstration on this light that you can also...
    view full answer...

  • Will Optronics Trailer Light # ST90RB Light Up if Connected Directly to a 12 Volt Battery
  • I can honestly say I have never had someone building a railroad crossbuck sign ask me a question! But, yes, the Optronics light # ST90RB will illuminate steady when connected to a 12 volt power source, like a battery, provided that the power source has a charge (if the battery runs low the light can dim). An LED light, like # STL90RB, will be brighter and use less power. It would not look as authentic, but it will consume less power and last longer. To be able to turn the light off...
    view full answer...

  • Will the Optronics Round Transit Stop and Tail Light A90RB Fit a Weldon 1010 Taillight
  • The Replacement Tail Light Lens for Round Transit Stop and Tail Light part # A90RB is designed for the Optronics Transit Light part # ST90RB therefore I cannot confirm it will work on your Weldon 1010 Taillight. They do have the same diameter so it may work in its place but otherwise you would have to replace the entire light assembly in which case this will be your best option for this.
    view full answer...


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Info for this part was:

Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Jeffrey L
Updated by:
Adele M
Updated by:
Laura H
Updated by:
Brian T
Installed by:
Cole B

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