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LED Clearance or Side Marker Light with Reflector - Submersible - 2 Diodes - Rectangle - Red Lens
(4626 reviews)
Price: $12.46
In Stock
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LED Clearance or Side Marker Light with Reflector - Submersible - 2 Diodes - Rectangle - Red Lens
Part Number: MCL40RB
In Stock
$12.46
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We'll connect you with nearby partnered installers who know this exact setup.
- All Info
- Reviews (4626)
- Q & A (0)
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Optronics Trailer Lights - MCL40RB
Highlights
- Reliable In Any Weather: Sonically sealed, waterproof housing keeps water out for lasting use.
- Fewer Replacements Needed: LEDs last 50 times longer and draw only 0.040 amps at 12.8 volts.
- One Light, Two Uses: Works as a clearance or side marker light with built-in reflex reflector.
- Easy Surface Mount: Flat-mount design installs without cutting holes; hardware not included.
- Compact Fit: 4" Lx1-1/2" Tx15/16" D with 3" mounting hole spacing fits tight spots.
- Consistent Visibility: P2 rating provides a 90-degree beam for clear, focused lighting.
Features to know about
Brighter, Longer-Lasting Light for Better Visibility: Efficient 2-Diode LED Design
This rectangular LED clearance or side marker light shines bright while drawing very little power. With just 0.040 amps at 12.8 volts, the pair of long-lasting LEDs provide crisp, even light that’s easy to see day or night. They last up to 50 times longer than incandescent bulbs and don’t have fragile filaments to burn out. That means fewer replacements and a dependable glow every time you tow.
Protection from Water and Weather: Fully Submersible, Sonically Sealed Build
No need to worry about rain, road spray, or boat launches—this light is built to handle it all. The housing and lens are sonically sealed into one waterproof unit that keeps moisture out completely. It’s fully submersible, so even underwater use won’t cause damage or corrosion inside the light. Once installed, it stays sealed tight and reliable trip after trip.
Simplified Mounting: Surface-Mount Design with 2-Wire Pigtail
Installing this light is straightforward thanks to its surface-mount setup. It sits flat against the surface—no hole cutting required—and secures using standard mounting hardware (not included). The center-to-center spacing between mounting holes is 3", making alignment easy on existing setups. Wiring is simple too, with a 2-wire pigtail that includes a power lead and a ground wire.
Extra Safety and Compliance: Built-In Reflex Reflector and P2 Rating
For added visibility without extra parts, this light includes a built-in reflex reflector that removes the need for a separate reflector plate. Its P2 rating provides a focused beam with a 45° spread to each side of centerline (90° total), ideal for use as a clearance or side marker light. With its red lens over white LEDs and durable polycarbonate housing, it delivers both performance and safety in one compact 4" x 1-1/2" x 15/16" package.
Specs
Dimensions
- Light dimensions: 4" long x 1-1/2" tall x 15/16" thick
- Distance between mounting holes (center on center): 3"
Electrical
- Power draw at 12.8 volts: 0.040 amps
Lighting
- Diodes: 2
Warranty
- Lifetime warranty on LEDs
MCL40RB Optronics LED Clearance or Side Marker Light with Reflex Reflector - Rectangle - Red Lens
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
- Product did not meet expectations
- Wrong item was ordered
Ratings & Reviews
4.8
4626 reviews
by:
Scott
03/19/2026
Exact replacement for my camper. Easy to order. Shipping was fast. Easy to install. Top quality.
by:
Stu
09/26/2026
It was a perfect replacement for my driver's side rear side panel of my Lance 2485.
by:
John
09/29/2026
All I needed to do was to replace the lens cover. Popped off the old one, snapped on the new one and I'm good to go.
by:
Colleen
12/22/2024
Well to be perfectly honest they haven’t been installed yet. My helper was stung in the eyelid by a bee! He had to go to the hospital. I know this doesn’t say anything about the product, but it’s an interesting story. More importantly, these are just lights that I’m sure will work, but the guy on the phone that helped me order them was awesome!
by:
Christopher
09/10/2026
OEM light for a Lance trailer
by:
Dale
08/31/2026
Good product, installed without difficulty.
by:
Barbara
08/26/2022
Clear picture and description of item. Was replacing broken marker light so had to be exact. User friendly site for ordering. Quick service. Our "Li'l Hilton" is whole again.
by:
Richard
06/08/2026
Fits perfectly, fast delivery! Great price! Thank you!
by:
Michael
04/29/2026
Works perfect. Exact fit. Thanks
by:
Jeff
06/27/2025
It was an excellent experience dealing with trailer. Fast service , fast shipping and product was spot on like it always is. Thanks for being a great company to work with
by:
Danny
11/20/2025
Great service that feels like your dealing with friends instead of a company
Mike L.
11/20/2025
Thanks Danny! I'm glad we could help!
by:
Matt
03/16/2026
very helpful
by:
Rialta99
03/31/2021
I bought 5 of these market lights to replace the market lights in the rear of my 1999 Winnebago Rialta. The size was very close and I opted for the low energy use LED version. After they were all installed, one of the LED lights did not work. Hence I took one star off. Make sure you test them before you go through the trouble of installing them. Since I just wanted to get the job done before the expected rain, I modified one of the lights and reused the bulb and holder from the original light. I did have to make some slight modifications to make the wiring work and the install was a bit tricky since there is no excess wiring protruding from the body of the Rialta. I was able to solder new wires on and make the connection. After one year they are all working fine and there is no moisture intrusion.
by:
Colleen
03/31/2023
We didn't receive the entire part originally but called and the complete part came. I'm still waiting to see if weneed to return the light cover or not
Katrina B.
4/25/2023
Have you had a chance to see if this is what you needed? We would love to hear your updated feedback.
by:
Kelly
05/30/2021
Thank You for the product. However this trial run was less than satisfactory.
Other companies delivered the same product in original packaging that contained the light, a weather tight gasket, And fastening screws. All We received was the light. In a envelope. You asked.
Other companies delivered the same product in original packaging that contained the light, a weather tight gasket, And fastening screws. All We received was the light. In a envelope. You asked.
Sierra K.
6/3/2021
Thank you for your review. The hardware is not included but these are already waterproof so no weather tight gasket is required.
by:
Jeff
06/18/2023
The clearance light is exactly the light I ordered! I’m more than satisfied!!
Jeff
6/19/2024
The light is a lower rear right side clearance light hat was accidentally knocked off! The replacement from etrailer.com is a perfect match from the old lens . It is still working perfectly a year later!!!
by:
Jason
02/18/2021
Perfect replacement for a factory marker light that failed. Way easier to replace at home then wait for factory service, parts order etc at the dealer.
by:
Seth
03/01/2020
Perfect fit for my Haulmark Enclosed trailer jack
by:
Brian P
12/19/2018
Great customer service , LED lights are a great , inexpensive upgrade. Well worth it !
by:
Edward
04/06/2018
Product was a direct replacement (ok, it may have been a updated version but same form, fit and function) and works like a charm. Shipping was good and on time. If I need more I know where I'll be ordering from. ;)
by:
Walter
08/01/2024
Easy to install and it serves a great purpose making my bike carrier (trailer) more safe.
by:
Charles
10/26/2022
I was amazed to find the exact clearance light for a 2015 travel trailer thanks for stocking these,they shipped out day after I ordered them. Thanks again.
by:
Robert
10/19/2021
This light was what was advertised and it works great. The service was very good, but the only thing I can say negative about this company is that I did not receive an email when the item was shipped with a tracking number. Other than that, everything was great.
by:
Kenny
10/13/2021
Great product. Fits my RV perfectly. Took one star off for slow shipping.
by:
Bill
10/27/2020
Was hoping these would replace the existing for the proper fit, and they did! Thank you etrailer, another wonderful job.
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See what our Experts say about this Optronics Trailer Lights
- Replacement LED Clearance Lights for 2015 Winnebago Minnie WinnieHello Steve; the closest thing we have to your requirements is the LED Clearance or Side Marker Light with Reflector # MCL40RB. This measures 4" long x 1-1/2" tall x 15/16" thick with mounting holes 3" apart on center. This light is sonically sealed so it is waterproof and submersible. The only thing is the wiring on the back. It is toward the center but not dead center coming out of the light. We do have the slightly taller # MCL0032RBB which has the wires coming out of the middle in...
view full answer... - Looking for Replacement Clearance Light Lens for Grand Design 420714Hey James, that light looks like the # MCL40RB which means for a replacement lens you'd need the part # A44RB.
view full answer... - Replacement Marker Light for OPT MCL40RB1Hi Chad; the LED Clearance or Side Marker Light with Reflector # MCL40RB is the replacement for your OPT MCL40RB1. This marker light will have the same 4" long x 1-1/2" tall x 15/16" thick dimensions you have now.
view full answer... - Recommended Replacement Clearance Light for a TMC Glo Brite 118AThat's correct, Richard the LED Clearance or Side Marker Light with Reflector # MCL40RB will work great as a replacement for your TMC Glo Brite 118A lights.
view full answer... - How To Remove Optronics LED Clearance or Side Marker Light # MCL40RB For ReplacmentTo remove the Lens # A44RB from the LED Clearance or Side Marker Light # MCL40RB you will need to place the tip of a flat head screwdriver between the lens and light assembly(see image). I recommend starting near the corners to reduce the risk of damaging the lens. Once you have the lens removed you will see the screws used to mount the lights. As this hardware is provided by the trailer manufacturer I cannot tell you exactly what it will have but a Philips head button screw is most commonly...
view full answer... - How To Remove The Lens On LED Clearance or Side Marker Light # MCL40RB For Installation I have included a link to our product video of the similar Amber Clearance Light # MCL40APB below. This has the same design with an amber lens and in the video she demonstrates removing the lens. You can also slide a flat head screw driver between the lens and back of the Light # MCL40RB. Then you will be able to twist the screwdriver to separate the 2 parts. Be sure during installation no Silicone # FAS59FR gets on this part of the backing and it would make it very difficult to remove...
view full answer... - Recommended Replacement Light for a Reflect-o-lite 300 SAE-PC-67I looked online and I couldn't find the Reflect-o-lite 300 SAE-PC-67 light you are looking for. Since your light is no longer available, I recommend replacing it with the LED Clearance or Side Marker Light with Reflector item # MCL40RB. This LED light is 4" long x 1-1/2" tall x 15/16" thick. It is also available in amber Optronics LED Clearance or Side Marker Light w/ Reflector item # MCL40APB.
view full answer... - Red Clearance Lights For A 2021 Northwood Nash Travel TrailerWe have what you are looking for. Depending on the style you currently have you have some choices. Just depends on what size and bulb type you need. We have the Optronics LED Trailer Clearance or Side Marker Light w/ Reflector - 6 Diodes - Rectangle - Red Lens # MCL44RB1 with a single wire. Or the Optronics Trailer Clearance or Side Marker Light w/ Reflex Reflector - Incandescent - Red Lens # MC44RB that is a double wire hook up. Or we have the LED Clearance or Side Marker Light with...
view full answer... - Replacement Lenses for MCL40/44 Series Optronics Lights in Red and AmberThe Replacement Red Lens for MC44 Series and BA44 Series Trailer Lights # A44RB is the 4 inch by 1-1/2 inch replacement for the # MCL40RB light. If you need the amber replacement lens that is # A44AB. These lenses will fit the MCK40/44 series lights from Optronics and I've confirmed this fit on the MCL40AB light you referenced.
view full answer... - Is the MCL40RB a 2 Diode LED Light?The LED Clearance of Side Marker Light # MCL40RB is the same light as the one you've got pictured. This light is also a 4" x 1-1/2" light with 2 diodes and will be an acceptable replacement for the light shown in your picture. The mounting holes on the # MCL40RB are 3" apart, center on center.
view full answer...
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Info for this part was:
Edited by:
Leah B
Expert Research:
Jameson C
Installed by:
Cole B
Updated by:
Wilson B
Updated by:
Brian T
Written by:
Anna W
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Colleen
12/23/2025
Oh, they were installed shortly after my original response. They’re working fine. No complaints.