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Snap-on Reflector Ring for Flange or Surface Mount Trailer Lights - Red
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Optronics

Snap-on Reflector Ring for Flange or Surface Mount Trailer Lights - Red

Part Number: A78RXB
121 Reviews | 18 Questions
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Snap-on Reflector Ring for Flange or Surface Mount Trailer Lights - Red Light Trim A78RXB
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7-7/8" Long x 3-5/8" tall x 25/64" deep, snap-on reflector ring enhances the appearance of your flange or surface mounted trailer light. Fulfills the rear reflex function, eliminating the need for a separate reflector. 1-800-940-8924 to order Optronics accessories and parts part number A78RXB or order online at etrailer.com. Free expert support on all Optronics products. Great prices and Fastest Shipping for Snap-on Reflector Ring for Flange or Surface Mount Trailer Lights - Red. Accessories and Parts reviews from real customers.
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Optronics Accessories and Parts - A78RXB

  • Trailer Lights
  • Light Trim
  • Optronics
  • Red

7-7/8" Long x 3-5/8" tall x 25/64" deep, snap-on reflector ring enhances the appearance of your flange or surface mounted trailer light. Fulfills the rear reflex function, eliminating the need for a separate reflector.


Features:

  • Snaps on - easy-to-use reflector ring
  • Enhances appearance of flange or surface mounted trailer lights
  • Fulfills rear reflex function
    • Eliminates need for separate reflector to meet DOT requirements
  • Measures 7-7/8" long x 3-5/8" tall x 25/64" deep


diagram

A78RXB Optronics Snap-on Reflector Ring for Flange or Surface-Mounted Trailer Lights - Red

Alternate part number: A-78RXB







Customers Who Purchased This Accessories and Parts Also Bought...



Video of Snap-on Reflector Ring for Flange or Surface Mount Trailer Lights - Red
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of the Snap-on Reflector Ring for Flange or Surface Mount Trailer Lights

Today we'll be taking a look at the Optronics Snap-On Reflector Ring for STL78RB series LED lights, part number A78RXB. Clean up your install and hide your hardware with this easy snap-on reflector ring. As you can see, after you install your Optronics light the hardware is exposed and doesn't look the best. This reflector solves that problem while enhancing the look of your trailer. It eliminates the need for a separate reflector to meet DOT requirements. It's very simple to install, it just snaps on over your existing Optronics light housing ...

and you've got it. That's going to complete our look at the Optronics Snap-On Reflector Ring for STL78RB series LED lights, part number A78RXB.

Customer Satisfaction Score:

Ratings & Reviews

4.8

121 reviews
5 Stars
(104)
4 Stars
(15)
3 Stars
(1)
2 Stars
(0)
1 Star
(1)
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by:
Our 5th wheel had a set of them and when we hauled our bikes they would be partially covered. So I added a second set. Looks great and adds safety to anyone following me.
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by:
The product is available elsewhere. But etrailer demonstrated a fair price, prompt shipping, and customer service is personal and exceptional.
by:
Exact match of original parts
Scott C. profile picture

Scott C.

5/17/2026

After 1 year, the rings are holding up well with no problems. Chose these to replace original rings when I rplaced the tailights, matching original style

Lazer S. profile picture
Etrailer Expert

Lazer S.

5/18/2026

@ScottC Glad to hear it! These definitely look better than the black ring going around the lights. What kind of camper did you install these on?
by:
Product fits as designed and is priced right! Also adds protection if taillights fail reflectors added safety.
by:
Just the right part for my taillights.
by:
Doing good.
by:
Too wet and cold to install right now. They look fine. I am replacing the lights that were improperly installed by Grand Design when my fifth wheel was built. They were both cracked at the holes due to over tightening. The lights are of average quality. Unfortunately I don’t think there is a higher quality product.
by:
Worked great as a replacement for OEM that was no longer available for RV. I also replaced the back side marker lights so the front and back matched.
Pat C did a great job in completing my order with substitution for out of stock resistor.
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by:
Nice way to increase the area of the brake lights.
by:
Good lites but no screws
by:
Great price fast service great quality
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David profile picture

David

12/5/2019

Great easy install

by:
They look great and function well, but I had to take mine off due to some door clearance issues with my door.
by:
The motor is noisy. When I try to contact the company there was no reply. I have the same fan in the RV already this was an addition to replace a non fan vent so I know how it should sound. I will buy a new motor for it and see if there is any reason to buy the product again. I waited months to receive the fan so it was disappointing the finally receive it and get it installed only to have it noisy.
by:
A78rxb Optronics Reflector Ring from ETRAILER.COM: I wasn't sure about this product so I only bought one. I was impressed with it, it snaps into place, covers the black frame area of the LED, and reflects the light brightly. The black frame area is such a wasted space, the Reflector Ring does a great job of reflecting light and making it look cool. Lights on a trailer, truck, or rig, COOL is always a PLUS FACTOR.
by:
Great service. Item shipped the day I ordered. Received days earlier than estimate. Item and shipping price very excellent. You have my business!
E S. profile picture

E S.

9/16/2016

Perfect. Still happy with product

by:
Great piece and obviously works well with the light. No need to add a reflector...
by:
The first shipment never updated tracking on the shipping status & was confirmed to have gotten lost somewhere in transit. They immediately sent out a new shipment & it arrived quickly & was exactly what I needed. I have ordered from etrailer several times & have always been satisfied with the products & the price.
by:
Look great and compliments the LED lights. You cannot miss the lights now.
Cecil A. profile picture

Cecil A.

9/29/2015

Still look great!

by:
Just as good as OEM if not better! Perfect fit.
Paul profile picture

Paul

5/19/2025

Great! Still working fine with no issues.

by:
Products are as advertised. Good Quality!
See picture for installation as replacement on 2004 Winnebago Journey StopLight. Wire with both postives active as stop light. Trim reflector kit make the install look good.
by:
Excellent product. Fast shipping and item as described. Highly recommend Etrailers for all your future purchases. This item really makes a nice addition to my cargo trailer.
by:
Great look and safety from following vehicles view.
The clear lens LED is modern looking and bright giving me confidence that I can be seen. Never enough lights !!
by:
Great way to add safety reflectors to existing tail lights. And looks stock also.
by:
Very nice reflectors. Fit perfectly and really give the finished look to my trailer tail lights. Simply snapped into place.
by:
The Reflector rings arrived in good time. The box it was packed in was packed very nicely to eliminate any breakage.
Great Products and Great Service.
I will recommend Etrailer to anyone.
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See what our Experts say about this Optronics Accessories and Parts

Do you have a question about this Accessories and Part?
  • GloLight LED Tail Light Compatibility with 2018 Coachmen Clipper ST108
    The GloLight LED Trailer Tail Light - Stop, Tail, Turn - Submersible - 22 Diodes - Oval - Red Lens # STL178RFPB is most likely a fit for your 2018 Coachmen Clipper ST108. The best way to confirm fit is to check the mounting hole locations. The mounting holes are 7 inches on center and 2-11/16 inches on center. I've attached a photo to assist. Then you can use the Snap-on Reflector Ring for STL78RB Series LED Lights - Red # A78RXB or the chrome ring # A78CB.
    view full answer...
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  • Is Snap On Reflector Ring part # A78RXB Optronics Brand Replacement Part
    Hey Tom, yes the Snap-on Reflector Ring for Flange or Surface Mount Trailer Lights # A78RXB is an OEM brand
    view full answer...
  • How Does Taillight Ring # A78RXB Get Removed
    To remove the ring # A78RXB you basically would want to grab one side of the ring and gently pry up on the ring till it releases from the mounting flange. If it does not want to remove this way you can use a thin slot screwdriver and slide it down into the slots on the sides of the light. This will allow you to push on the hooks of the ring so that they will release from the light. See picture to see where to insert the screwdriver.
    view full answer...
    Image 1 for
  • Do Optrionics LED Trailer Light # STL78RB Come as a Set or Sold Individually?
    The Optronics LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 10 Diode - Oval - Red Lens # STL78RB is a single light. If you want a set, you will need to change the quantity box on the product page when ordering. I've attached a photo of the dimensions of the light as well as the mounting hole locations to assist. You may also be interested in the accent ring # A78CB or reflector # A78RXB which snap on to cover the mounting screws.
    view full answer...
    Image 1 for
  • Picture Request for the Snap-On Reflector Ring Installed on a Optronics 6-1/2 inch Oval Light
    I went out in to our warehouse and pulled a Optronics Trailer Light # STL78RB and a Snap-on Reflector Ring for STL78RB Series LED Lights # A78RXB to show you what they look like together. I attached a picture and a video I shot also.
    view full answer...
    Image 1 for
  • Optronics LED Trailer Lights # STL78RLPB Package Contents
    The Optronics LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 10 Diodes - Oval - Red Lens # STL78RLPB comes as a single light. You will need to select the quantity desired on the product page or in your online shopping cart. This light uses the 3-Wire Pigtail for Optronics Trailer Lights - 3-Prong PL-3 Plug - 10" Lead # A45PB or right angle # A47PB which are sold separately. You may also be interested in the Snap-on Reflector Ring for STL78RB Series LED Lights - Red # A78RXB...
    view full answer...
  • What Light Assembly Does Snap-on Reflector Ring # A78RXB Fit
    Although the Snap-on Reflector Ring, # A78RXB, will not fit the STL178 series lights like the Optronics GLOLight LED Stop/Turn/Tail Light # STL178RFPB, I do have a solution for you. Take a look at the Sealed, 6-1/2" Oval LED Trailer Stop, Turn and Tail Light, # STL78RB. This light was designed to be used with the reflector ring. I spoke with my contact at Optronics and they do not offer a reflector ring for the STL178 series lights. The lights look incredibly similar but the light you...
    view full answer...
  • Will Snap-on Reflector Ring # A78RXB Fit Optronics GLOLight LED Stop/Turn/Tail Light # STL178RFPB
    Although the Snap-on Reflector Ring, # A78RXB, will not fit the STL178 series lights like the Optronics GLOLight LED Stop/Turn/Tail Light # STL178RFPB, I do have a solution for you. Take a look at the Sealed, 6-1/2" Oval LED Trailer Stop, Turn and Tail Light, # STL78RB. This light was designed to be used with the reflector ring. I spoke with my contact at Optronics and they do not offer a reflector ring for the STL178 series lights.
    view full answer...
  • 6-1/2 inch Oval LED Clearance Light Recommendation that Surface Mounts
    My recommendation for your application is the Sealed, 6-1/2" Oval LED part # STL78RB. I attached a review video for you to check out as well. Then you can use the Snap-on Reflector Ring for STL78RB Series LED Lights - Red # A78RXB. This will allow you to use them as clearance lights for the center wiring only that portion and then for stop and turn lights on the sides wiring all the functions of the light.
    view full answer...
    Image 1 for
  • What Reflector Ring Fits the LED Trailer Tail Light # STL73RB?
    I confirmed with my contact at Optronics that the reflector ring that you need for the LED Trailer Tail Light w/ Flange - Stop, Turn, Tail - Submersible # STL73RB is the Snap-on Reflector Ring for STL78RB Series LED Lights # A78RXB.
    view full answer...
  • Does Optronics LED Trailer Light Use Reflector Ring
    The GloLight LED Trailer Tail Light # STL178RB will not work with the Snap-on Reflector Ring for STL78RB Series LED Lights # A78RXB as it will not fit the light. If you wanted to use that reflector ring you would need the Optronics LED Trailer Tail Light # STL78RB. This is similar to the GloLight but has a lip around the edge that allows it to accept the Reflector Ring. You can use these lights for your trailer as long as they have the side marker lights. I have added a link to a help...
    view full answer...
  • Is there a Chrome Reflector Ring Similar to the Snap-on Reflector Ring A-78RXB?
    Hey Chase we do not. I checked with Optronics and the Fusion LED Hardwired Trailer Light item # OPT24NR is not going to work with the Snap-on Reflector Ring for Flange or Surface Mount Trailer Lights item # A78RXB you referenced. You need the PVC Grommet for 6-1/2" Oval Trailer Tail Lights item # a70gb. To mount them and you can't place a snap ring around them. What kind of trailer do you have? If you have any additional questions feel free to throw them into the comment box below.
    view full answer...
  • Stop, Turn, Running and Reverse Lamp Compatible with Optronics A78RXB Snap-On Reflector Ring
    The # A78RXB snap on reflector ring you mentioned is only compatible with Optronics STL78 series taillights like the # STL78RB , none of which has the provision for a reverse lamp. Your best bet would be to use a # STL78RB stop/turn/taillight and a separate reverse lamp like # BUL78CB which is a surface mount lamp like the # STL78RB.
    view full answer...
  • Will the Optronics Snap-on Reflector Ring # A78RXB Fit STL78 and BUL78 Trailer Lights
    I spoke with my contact at Optronics and verified that the Snap-on Reflector Ring, # A78RXB, will fit the BUL78 and STL78 series LED trailer lights. The configurations of the lights are the exact same. The only difference is one is a backup light (BUL78) and one is a stop, turn and tail light (STL78). It is not customary to put a red reflector ring around a clear light, but there is no reason why you could not do that. Keep in mind, the # BUL78CB is a utility light, so it will have a...
    view full answer...
  • Installation of Resistors on Fusion LED Trailer Tail Light
    The Fusion LED Trailer Tail Light - Stop, Tail, Turn, Backup - Submersible - Oval - Red/Clear Lens # STL68RB. The Stainless Steel Trim Ring for Optronics STL68RB Trailer Tail Light # A68SSB or the Snap-on Reflector Ring for STL78RB Series LED Lights - Red # A78RXB finish it up nicely. The LED lights don't always require resistors, but if you want to add them the LED Light Bulb Load-Resistors - # DI34ZR. If you are replacing all your trailer lights to LED then the # 20142 will work...
    view full answer...
  • Chrome Accent Ring For Optronics Trailer Light
    We do carry a snap-on accent ring for the Optronics LED Stop/Turn/Tail Light, part # STL78RB. I pulled both the tail light and a snap-on accent ring, part # A78CB. This accent ring is a perfect fit for the tail light. It measures 7-7/8 inches long and 3-5/8 inches wide. If you prefer the reflector ring then use Snap-on Reflector Ring for STL78RB Series LED Lights - Red # A78RXB.
    view full answer...
  • Oval LED Trailer Light Option That will Also Provide a Reflector
    I may have a solution for you, however, the Optronics Sealed 6-1/2 Inch LED Trailer Light, # STL70RB, does not contain reflectors. At this time we do not have any 6-1/2 inch oval tail lights that have reflectors in the lens. Instead, I would recommend using the Flange Mount Oval LED Trailer Light, # STL78RB, and adding the Snap-On Reflector Ring, # A78RXB. As mentioned in the title of the product, this ring will simply snap over the light on top of the mounting flange to provide a reflector...
    view full answer...
  • Removal of the Snap-on Reflector Ring # A78RXB
    The Snap-on Reflector Ring # A78RXB that you referenced attaches at the top, bottom, left, and right of the mounting flange of the light assembly with clips that slip over the flange when pressed on. To remove the ring you basically would want to grab one side of the ring and gently pry up on the ring till it releases from the mounting flange. If it does not want to remove this way you can use a thin slot screwdriver and slide it down into the slots on the sides of the light. This will...
    view full answer...
    Image 1 for

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Info for this part was:

Employee Tyler C
Written by:
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