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Miro-Flex LED Trailer Side Marker Light and Mid-Ship Turn Signal - Submersible - Amber Lens
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Optronics

Miro-Flex LED Trailer Side Marker Light and Mid-Ship Turn Signal - Submersible - Amber Lens

Part Number: OPT78FR
109 Reviews | 8 Questions
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$23.53
Retail:$26.34
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optronics trailer lights marker turn submersible
optronics trailer lights clearance 6l x 2-1/4w inch miro-flex led side marker light and mid-ship turn signal - submersible amber lens
optronics trailer lights clearance submersible miro-flex led side marker light and mid-ship turn signal - amber lens
optronics trailer lights clearance marker turn miro-flex led side light and mid-ship signal - submersible amber lens
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optronics trailer lights marker turn submersible opt78fr
optronics trailer lights marker turn 6l x 2-1/4w inch opt78fr
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optronics trailer lights submersible 6l x 2-1/4w inch opt78fr
optronics trailer lights clearance 6l x 2-1/4w inch

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6" x 2-1/4" Rectangle. Waterproof trailer light functions as both a side marker light and turn signal. Amber polycarbonate lens. 16 LEDs. Surface mount on 4-13/16" centers - hardware not included. Delphi plug. PC rated. Great Prices for the best trailer lights from Optronics. Miro-Flex LED Trailer Side Marker Light and Mid-Ship Turn Signal - Submersible - Amber Lens part number OPT78FR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - OPT78FR

Highlights

  • One Light, Two Functions: Works as both a side marker and mid-ship turn signal for clear signaling.
  • Reliable In Any Weather: Sonically sealed housing and lens are waterproof and fully submersible.
  • Bright, Efficient Output: 16 LEDs give strong amber light with less power draw and no bulbs to replace.
  • Wide-Angle Visibility: PC rating provides 180° horizontal coverage so signals can be seen from more angles.
  • Durable Build: Polycarbonate lens and housing resist impact and wear for long service life.
  • Simple Weather-Tight Connection: Delphi plug creates a sealed, reliable link to your trailer wiring.

Features to know about

Upgrading Visibility and Safety: Bright, PC-Rated LED Output

This Miro-Flex LED trailer light punches well above its size with 16 bright LEDs behind a faceted amber lens. The PC rating means it shines at a full 180 degrees—covering both front and side angles so others can see you coming or turning. Mounted mid-ship or along the side, it doubles as a clearance light and a turn signal for better overall visibility day or night.

Keeping Moisture Out: Sonically Sealed and Submersible Build

If your trailer ever hits wet roads or the boat ramp, this light is built to handle it. The polycarbonate lens and housing are sonically sealed into a single waterproof unit, keeping water from seeping in and damaging the LEDs or circuits. It’s designed to stay reliable even when fully submerged, so you won’t be fighting corrosion or flickering lights down the road.

Simplifying Installation: Surface Mount with Delphi Plug Connection

Mounting is straightforward thanks to the surface-mount design with 4-13/16" centers. The integrated Delphi plug provides a weatherproof connection, making wiring clean and secure without extra sealing work. If your trailer already uses Delphi connectors, it’s practically plug-and-play—no splicing needed.

Built to Last: Durable Polycarbonate Housing and Long-Life LEDs

The Miro-Flex design not only looks modern but also holds up under heavy use. The polycarbonate construction resists impact and UV damage, while the LEDs last up to 50 times longer than incandescent bulbs. With no filaments to break or bulbs to replace, you get consistent brightness season after season with minimal maintenance.

Specs

Dimensions

  • Overall dimensions: 6" long x 2-1/4" tall x 1-3/8" deep
  • Mounting hole dimensions (center to center): 4-13/16"

Dimensional diagram of Optronics Miro-Flex LED Trailer Side Marker and Turn Signal Light showing measurements of 6 inches long, 2-1/4 inches tall, and 4-13/16 inch mounting hole spacing.

Electrical

  • Diodes: 16

Warranty

  • LED warranty: Lifetime warranty on LEDs

MCL73ASAXB Optronics Mid-Ship Turn Signal and Side Marker/Clearance Trailer Taillight - PC Rated - Amber Lens - Delphi Plug







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Customer Satisfaction Score:

Ratings & Reviews

4.7

109 reviews
5 Stars
(91)
4 Stars
(9)
3 Stars
(3)
2 Stars
(2)
1 Star
(4)
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by:
Replaced old rusted OEM mid-ship lights. These are bright and look great.
Benjamin profile picture

Benjamin

10/11/2026

Still great mid-ship turn signals.

Jerred H. profile picture
Etrailer Expert

Jerred H.

10/11/2026

@Benjamin Happy to hear that. Glad the mid-ship turn signal item # OPT78FR is working well for you. Thanks for coming back and letting us know.
by:
i installed these lights along the walls of my 45' London Aire. I wasnt happy with the dull factory install one signal light per side and felt it wasnt safe enough.
The marker lights are very bright, but my main concern was the signal lights. I was amazed to see how bright the signal lights are even bright day lights. i installed two lights on each side of the coach, one in front and one in mid ship.
by:
Took a minute to install due to the old light installation. I was pleastly suprised when I had my truck do a self check and come around the corner and see the light operate for the first time. All is well.
by:
Ideal replacement for mid turn light on my 27’ gooseneck.
by:
It fit perfect on my Timpte grain trailer, and it works great. Plug and play no wiring to mess with. I’ve had it installed for over a year now still going strong.
by:
Just what I needed.
by:
Quality product and arrived when it was supposed to.
by:
Exactly what I needed and it arrived ahead of schedule which was a big plus for me.
by:
these lights are great. I wanted to replace the middle marker light on my 5th wheel and these woked out very well. Only a little bigger footprint than the OEM ones but don't look out of place on the rig. I've ordered items from eTrailer before and always recieved them very quickly. I took off one star because this time although they had the parts in stock, it took over a week for them to actually ship it. However, customer service always has been and remains excellent.
by:
Much brighter than the clear lens lamps I installed last year, and far easier to see from behind. Price was excellent!
Keith profile picture

Keith

10/19/2022

After a year I still find these to be superior even to the OEM that were put on the coach 21 years ago.

by:
Seems like a nice piece. Haven't installed yet, need to find female molex connector to go with it.
by:
Great replacement midship lights
by:
Used these on our fifth wheel they work great!
by:
Excellent product and I will buy it again for my next trailer.
by:
very very bright
Raymond profile picture

Raymond

6/26/2022

after using them for 1 year in winter and summer on my farm tractor they still work so excellent lights and very bright in the day and the evening

by:
Prompt delivery--exactly as described
by:
great product
by:
Great service
by:
Product was exactly what I wanted awesome
by:
+++
by:
I paid for next day delivery and it was two days.
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Info for this part was:

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Employee Jameson C
Expert Research:
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Employee Wilson B
Updated by:
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Employee Mark S
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