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Thinline LED Clearance and Side Marker Light w/ Chrome Bezel - Submersible - 3 Diodes - Red Lens
(2684 reviews)
Price: $13.97
In Stock
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Thinline LED Clearance and Side Marker Light w/ Chrome Bezel - Submersible - 3 Diodes - Red Lens
Part Number: MCL-91RK
In Stock
$13.97
Retail:$19.99
You Save: 30%
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- All Info
- Reviews (2684)
- Q & A (0)
- Photos
Optronics Trailer Lights - MCL-91RK
Highlights
- Better Visibility, Less Power: 3 bright LEDs draw only 0.051 amps at 12.8V for efficient lighting.
- Reliable In Any Weather: Sonically sealed, waterproof housing keeps out water and dirt.
- One Light, Two Functions: Works as both a clearance and side marker light when properly mounted.
- Easy, Clean Install: Surface-mount design with included hardware and single-wire ground hookup.
- Compact Fit Anywhere: Thinline 2-1/2" x 1-3/16" size fits tight spaces with 2" hole spacing.
- Polished Look: Chrome bezel gives a finished appearance that matches other trim.
Features to know about
Brighter, Longer-Lasting, and Efficient: LED Clearance and Side Marker Light
This Thinline LED light is a clean upgrade from old incandescent markers. It uses three white LEDs behind a red lens to give off a bright, even glow while drawing only 0.051 amps at 12.8V. The LEDs last up to 50 times longer than bulbs with filaments, so you won’t be wasting time swapping them out. It’s DOT compliant and PC rated, meaning it puts out a crisp 180-degree beam for better visibility from the front and side.
Tight Spots Made Simple: Low-Profile Thinline Design
When space is tight, this light fits where others won’t. At just 2-1/2" long x 1-3/16" tall x 7/8" thick, its low-profile Thinline Series shape gives you clearance without anything sticking out awkwardly. The chrome housing adds a clean finished look that blends in neatly once mounted. It’s a solid pick for anyone who wants a compact but capable light that still meets PC-rating visibility standards.
Worry-Free Water Protection: Fully Submersible and Sealed
If your trailer deals with wet conditions or even full submersion, this light is built for it. The housing and lens are sonically sealed into one waterproof unit that keeps out water and debris. That means no corrosion, no shorted diodes, and no fogged lenses—just reliable lighting every time you use it.
Quick Mounting Made Easy: 1-Wire Design and Included Hardware
Installation couldn’t be simpler. This surface-mount light uses included hardware and a single-wire setup that grounds through the mounting hardware itself. The 2" center-to-center hole spacing lines up easily for mounting, so you can replace an older light or add new ones with minimal effort. It’s a straightforward setup that works right the first time—no extra connectors or adapters needed.
Specs
Dimensions
- Overall dimensions: 2-1/2" long x 1-3/16" tall x 7/8" thick
- Distance between mounting holes (center on center): 2"
Electrical
- Power draw at 12.8V: 0.051 amps
- Voltage: 12V DC electrical systems
Lighting
- Diodes: 3
- Lens color: Red
- LED color: White
- PC rated: Yes
- DOT compliant: Yes
- A PC-rated light produces a 90-degree angle of light to either side of its centerline for a total of 180 degrees of coverage.
Construction
- Mount type: Surface mount to trailer with included hardware
- Design: Single wire design grounds through mounting hardware
- Housing: Chrome
- Waterproof: Yes
- Submersible: Yes
- Series: Thinline Series
Warranty
- Lifetime warranty on LEDs
MCL91RK Optronics Mini Thinline 12V LED Clearance and Side Marker Trailer Light w/ Chrome Bezel - Submersible - 3 Diodes - Red Lens - PC Rated
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
- Wrong item was ordered
Ratings & Reviews
4.8
2684 reviews
by:
Ernest
09/24/2026
Works great as the tailgate clearance lights on a squarebody chevy. The chrome really looks nice. Couldn't be happier
by:
Carol
03/06/2026
Exactly as described on the website. Shipping was pretty quick also. Thanks!
by:
Steven
09/03/2025
I love the final look of these! Very bright and clear! However I needed to modify the chrome frame, cutting off the angle piece so that I could plug both connectors in fully, it wouldn't work otherwise. Also the tiny screws that came with it were a joke. I needed to substitute bolts, washers and lock nuts to secure it to my 1997 Shoreland'r Trailer.
by:
Tom
09/24/2026
They are great.
by:
Robin
02/17/2023
I was very impressed with your customer service! I wasn't sure what to even call the part I was looking for but Conner Lund answered my confused email the next day and sent me a link to exactly what I needed. I ordered the lights the same day and they came today, 2 days later! It doesn't get much better than that! So thanks for everything. You guys are great!
Robin
2/18/2024
Completely satisfied! My husband installed the new light on our RoadTrek RV and we are now lit! As the kids say...
by:
Rick
07/23/2018
Good quality lights, installed easily enough. I used #8x3/4" flat head, self tapping screws as I thought the ones include were a bit too small. Be sure to drill the hole that your power wire runs through at an over size. Otherwise the power connector on the back of the light can ground out on the trailer frame, shorting out everything or over heating your wiring.
by:
George M.
07/31/2014
Terrible push in connection. Had to use heat shrink to keep in place and protect. Very bright but I would purchase different item based on the connection.
by:
Nick Schwartz
08/21/2015
These folks have the knowledge and expertise with great prices. They take the time to explain too. Like to see free shipping on the lower price items or coupons if possible. Will use again.
by:
Brad S
10/16/2016
Great products! Fast shipping. Very satisfied. I have already installed them on my trailer. Thanks again
by:
Dale
08/31/2019
Quick safe shipping and just what I needed, thanks for being the lowest cost.
by:
Meade
02/28/2023
Very difficult to install....the positive wire breaks off when installing the actual led into the base...I had to solder the wire back onto the connector...no fun...but in the end..success
by:
Jim B
07/09/2016
A very bright LED marker light for my boat trailer.
by:
David
12/19/2021
These lights are well made and look great. They are a direct replacement for the older version I have. Tinted them to match the trailer. They were very easy to tint as the light surface is very flat.
by:
j-earl
06/26/2019
Products always as advertised... Great company to buy from, with fast shipping service.
by:
BZ
02/12/2015
Brighter than old incandescent lights. Easy to install and all hardware was included. Sealed and submersible for marine trailer use.
by:
Bill H.
04/29/2016
Great service and delivery. I was amazed at the assortment available. If you can't find it here you probably don't need it. I will recommend this site to anybody needing trailer components.
by:
stephen
08/07/2015
finding parts was a snap, replied to order immediately, tracking package was effortless arrived on time in excellant condition.
thanks
steve F.
thanks
steve F.
by:
Ryan
07/12/2016
Nice led lights look great
by:
Alan
02/05/2024
Easy to install. Bright LEDs look great on my trailer.
by:
Les
12/13/2018
Great service and prompt delivery
Les
12/14/2019
Lower current draw and great visibility - love led lighting!!!
by:
Eugene
03/01/2025
They fit and worked perfectly, Very bright.
by:
Belinda
04/13/2025
Great product, great company. Fast service.
by:
Rick B
02/04/2017
Very happy with the lights I purchased. Being LED they are quit a bit brighter then the old ones that came with the trailer. Was very happy with Etrailer in the quality of the product and the quick turn around.
by:
DerekB
05/18/2019
Easy install, much brighter than the old lights.
by:
Jacob
03/04/2021
Very bright and submersible! Mounted on PWC trailer.
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Show More Reviews
See what our Experts say about this Optronics Trailer Lights
- Recommended Replacement Rear Upper Clearance Lights for 2004 Roadtrek 190I looked up some photos of a 2004 Roadtrek 190 online and the rear upper clearance lights appear to be very similar to the ThinLine Mini LED Side Marker or Clearance Light part # MCL-91RK so that is what I recommend using for replacement. If these won't work for you then you'd need to select another option from the list below. It's unlikely you'd find an exact replacement due to age so close is all we're going for here. They all install pretty much the same so there should not be many issues...
view full answer... - LED Lights for 1991 Ranger Boat TrailerWe can get you all the lights you need though it will come in the form of different parts because there isn't a specific "kit" containing everything. For the stop/turn/tail lights you can use the GloLight LED Trailer Tail Light # STL178RFPB; this is a surface mounted light that is 7-1/2" wide x 3-5/16" tall x 1-1/8" deep and has an industry-standard 3-prong plug to connect to your trailer. Then for your clearance lights you can use # MCL-91AK, which is amber and measures 2-1/2" x 1-3/16"...
view full answer...
- Recommended Lights Similar to Optronics Tail Light for Tear TrailerThere are a number of lights that would work well for that are similar to the Optronics # STL72RB tail lights you have. For your three running lights I recommend the Thinline LED Clearance and Side Marker Light w/ Chrome Bezel # MCL-91RK. For the reflectors I recommend checking out the Optronics # RE11AB for amber and # RE11RB for red. Additionally, LED # ILL22CB would work great as an exterior light; it is a surface-mounted light with a 2-wire design. LED light # RVILL34 is also going...
view full answer... - What is the Mounting Hole Spacing for Mini Thin Line Sealed LED Marker/Clearance Light # MCL-91RKOn the Mini Thin Line Sealed LED Marker/Clearance Light # MCL-91RK the mounting holes are spaced 2 inches apart on center. I have included a link to a video review of this light for you.
view full answer... - Boat Trailer Market Light Replacement Recommendation for Chaparral Boat TrailerThanks for the picture of the light you are looking to replace. It looks like our closest replacement is the part # MCL-91RK which has the chrome base like what yours has.
view full answer... - Can Mini Thin Line Sealed LED Marker/Clearance Light # MCL-91RK be Used to Replace a 2-Wire LightMini Thin Line Sealed LED Marker/Clearance Light # MCL-91RK only has 1 wire because it grounds through the mounting hardware. You can still use it by putting a ring terminal on the existing ground wire and running the ground screw through it. The other wire is the power wire.
view full answer... - Does Optronics Red Side Marker Light Include a Base and WiringTrailer light # MCL-91RK includes the red clearance light and chrome housing in addition to the plug. Basically it is exactly like # MCL-91AK except it is red instead of amber so they will match.
view full answer... - Availability of Red and Amber Optronics ThinLine Mini LED Side Marker or Clearance LightsThe red lens equivalent of the amber Optronics Side Marker Light # MCL-91AK that you referenced is part # MCL-91RK. I've attached review videos for both that you can check out.
view full answer... - Is There a Red Version of the Optronics GloLight MCL190ABThe closest light we have to what you referenced in red would be the part # MCL-91RK.
view full answer... - Red Trailer Clearance Light That Measures 2-1/2 Inches x 1 InchWe do have red trailer clearance lights that are 2-1/2" x 1", and what you will need is the following: - Thinline LED Clearance and Side Marker Light w/ Chrome Bezel # MCL-91RK
view full answer... - Availability of a Red Mini Thin Line Sealed LED Marker/Clearance LightFor a red Mini Thin Line Sealed LED Marker/Clearance Light, you will need to use # MCL-91RK. The R in the part number indicates that it is a red light.
view full answer...
Do you have a question about this Trailer Light?
Info for this part was:
Expert Research:
Michael H
Updated by:
Adele M
Updated by:
Wilson B
Updated by:
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Updated by:
Noah M
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Lazer S.
9/25/2026
Nice truck, Ernest! The lights definitely look good on there! ^___^ Is this your every day truck or more of a cruiser?