bing tracking image
  1. Trailer Lights
  2. Optronics
  3. Clearance Lights
  4. Light Bar
  5. LED Light
  6. Red
Identification Light Bar for Trailers over 80" Wide - Submersible - 3 Diodes - Red Lens
Optronics

Identification Light Bar for Trailers over 80" Wide - Submersible - 3 Diodes - Red Lens

Part Number: MCL78RB
In Stock
$40.15
Trailer Lights
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
By submitting this form, you understand and agree to our Terms of Sale, Website Terms of Use and Privacy Policy.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

17" Long x 1-3/8" tall x 1" deep. Waterproof identification light bar is designed for trailers wider than 80". Durable polycarbonate lens and housing. Surface mount to trailer. 2-Wire pigtail. Great Prices for the best trailer lights from Optronics. Identification Light Bar for Trailers over 80" Wide - Submersible - 3 Diodes - Red Lens part number MCL78RB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (809)
  • Q & A (0)
  • Photos

Optronics Trailer Lights - MCL78RB

Highlights

  • Bright, Efficient LEDs: Three red LEDs give clear ID lighting while drawing only 0.022 amps.
  • Reliable In Any Weather: Sonically sealed, waterproof housing keeps water out when submerged.
  • Built for Wide Trailers: Meets ID bar requirement for trailers over 80" wide.
  • Tough Polycarbonate Build: Durable lens and housing resist cracks and wear.
  • Simple 2-Wire Connection: Power and ground leads make hookup quick and easy.
  • Long-Lasting Performance: LEDs last 50 times longer with no bulbs to replace.

Features to know about

Brighter, Longer-Lasting, and Efficient: LED Identification Light Bar

Upgrading from old incandescent lights makes a big difference in clarity and reliability. This 17" long identification light bar uses three white LEDs behind a red lens to deliver bright, even illumination while drawing only 0.022 amps at 12.8V. The LEDs last up to 50 times longer than traditional bulbs and don’t have fragile filaments to fail. You get strong light output with less power demand—no bulb changes or dimming over time.

Protection from Water and Corrosion: Fully Submersible, Sonically Sealed Design

Worried about water damage? This light bar is built as a single sealed unit with its lens and housing sonically fused together. That means it’s completely waterproof and submersible, so no moisture can seep in to corrode connections or short out the diodes. Whether it’s rain, washdowns, or full submersion, the housing keeps the internal components safe and dry.

Tough Enough for Everyday Use: Durable Polycarbonate Build

This light is made to hold up under repeated use and exposure. The tough polycarbonate housing and lens resist impact and cracking, keeping the LEDs protected over time. Even with vibration and road dust, the solid build keeps this ID bar working reliably without fading or loosening.

Simple Wiring and Mounting: Straightforward Installation

Getting it installed is quick thanks to its 2-wire pigtail—one for power and one for ground—and surface-mount design. The bar measures 17" long x 1-3/8" tall x 1" thick with mounting holes spaced at 16-1/8" center-to-center. You can set it in place with standard hardware (not included) and be ready to go without rewiring hassles or special adapters.

Consistent Visibility Where It Counts: P2-Rated Beam Pattern

The P2 rating gives this light a focused beam that covers a 90-degree spread—45 degrees to either side of centerline—providing strong rear visibility for identification on wider trailers. It delivers the right amount of brightness straight back where it’s needed most, keeping your trailer easy to spot in low-light conditions.

Specs

Quantity

  • Quantity: 1 identification light bar

Dimensions

  • Length: 17" long
  • Height: 1-3/8" tall
  • Thickness: 1" thick
  • Distance between mounting holes (center on center): 16-1/8"

Dimensional diagram of Optronics MCL78RB red LED identification light bar showing length, height, and mounting hole spacing for trailer installation.

Electrical

  • Diodes: 3
  • Power draw at 12.8V: 0.022 amps

Warranty

  • Lifetime warranty: on LEDs

MCL78RB Optronics ID Light Bar for Trailers over 80" Wide - Submersible - 3 Diodes - Red Lens - P2 Rated

Alternate part number: MCL-78RB





Customer Satisfaction Score:

Ratings & Reviews

4.8

809 reviews
Review sort icon
17" Long x 1-3/8" tall x 1" deep. Waterproof identification light bar is designed for trailers wider than 80". Durable polycarbonate lens and housing. Surface mount to trailer. 2-Wire pigtail.

by:

Always great service. Pat C. did address all my concerns with this order. Great company to deal with. They have a great selection of products to choose from for most applications.



by:

Great service, fast shipping.



by:

Product was fine. Only complaint would be I wish it could be delivered faster.



by:

Rebuilt a trailer. Everything I received from etrailer was quality. Trailer came out great.
Thanks Etrailer.



by:

Great service as always. Will continue to use etrailer for all of my trailer needs. Light was as described and quality appeared good.



by:

I guess it’s ok for a center clearance light. It’ll do the job, i suppose. Guess I didn’t see the part in the title where it said that it was only a 3 diode. I figured there’d be an LED behind each circle on the front of the light but there’s not. For over 20 bucks, you’d think there would be.



by:

Purchased one of these lights from Amazon and was junk. Found etrailer site and this light is the same as the OEM. Now hope some knucklehead won't hit my trailer in the parking lot again!!



by:

eTrailer customer service is first class. When I need things for my truck and trailer, I always look to eTrailer first.



by:

Light is just what I had anticipated. However, what I did not anticipate was the small hole size. And because the mounting hardware does not come with, I had to dig through my stash to fine two that worked. Seems like mounting hardware should be included, especially if hole size is so small with limited solutions.



by:

Works perfectly!!!! Looks really good too, even though it is just a trailer. Great product & company to do business with

Kerry B. profile picture

Kerry B.

8/21/2018

Badass!!!!



by:

I needed to replace the damaged light bar on my boat trailer. I was able to easily find and order this part from the etrailer website. It arrived on schedule and was exactly what I needed. I would highly recommend this company.



by:

This is a perfect product, fit like the OEM on my Heritage Chaparral Trailer. Good quality and very fast shipping. Thanks again.



by:

The 3 LEDs is kind of lame considering the light housing appears to be made for 11 LEDs. It does work, and has worked for over a year. It is acceptable considering how inexpensive it is.



by:

I have placed 2 orders with etrailer. Both orders were for trailer lights. The videos explaining the operation of the lights were very helpful. Prices were very competitive and the shipping costs were reasonable. Both orders shipped the same day. I feel the folks at etrailer went out of there way to give me a pleasant experience.





by:

This light is an exact replacement of the original product on my trailer. The trailer manufacturer drilled and broke the water tight seal when the original was installed.



by:

Side marker lights were perfect, however stop/tail lights did not fit the curve trailer frame insert.



by:

This idenrifaction led light bar works perfectly and matched the original hole pattern of the light I waas replacing.
I was concerned that it my not be bright enough since it only had one led per light but that was not the case. It is plenty bright and easily visible even in daylight.



by:

Ordered new red & yellow led signal markers and a new lid for the trailer. All arrived in 3-4 days and all the old Lights’s swapped out easy. Trailer looks new!



by:

I was not able to source this light from my trailer dealer. After a very very brief search on etrailer I found what I was looking for. The pricing was incredible. The shipping was quick and efficient. I have been a returning customer for all my trailer needs



by:

Thanks for the great service as always! Before and after photos....



by:

Product quality appears excellent. I chose this one because it was LED, sealed, and because the spacing between the bolt holes matched the holes in my trailer from the old light housing. I had to enlarge the center hole a bit to allow the ground connector to pass through but that was easy enough with a stepped bit. I was able to remove the old light, clean up the metal frame and bolt this one right in place. I was about to drill another hole for the ground wire's ring terminal when I realized that it was long enough to connect to one of the bolts. That is probably obvious to many but I almost missed it.
One minor complaint was that the holes for the mounting bolts were really small. I was able to find a pair of tiny bolts in my junk drawer that fit but they are REALLY small. I think this would be better if the holes were a bit larger.



by:

Thank you for the fast shipping and having the part I needed



by:

Super fast shipping and looks like a quality product!



by:

Received as described.



by:

Delivery time was as told. Packaging was good and padded. Looks fine works fine. Wiring is color coded. I’ve used this company as couple of times and would again.


25
25

See what our Experts say about this Optronics Trailer Lights

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 Jeff D
Installed by:
Jeff D
Employee Cole B
Installed by:
Cole B
Employee Jacob T
Video Edited:
Jacob T
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T
Employee Noah M
Updated by:
Noah M
Employee Shane H
Test Fit:
Shane H
Employee Michael B
Video by:
Michael B

At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.