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Optronics Clearance and Side Marker Trailer Light - Submersible - Incandescent - Round - Red Lens
(2623 reviews)
Price: $3.22
In Stock
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Optronics Clearance and Side Marker Trailer Light - Submersible - Incandescent - Round - Red Lens
Part Number: MC55RB
In Stock
$3.22
Retail:$4.74
You Save: 32%
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- All Info
- Reviews (2623)
- Q & A (0)
- Videos (2)
- Photos
Optronics Trailer Lights - MC55RB
Highlights
- Reliable In Any Weather: Sonically sealed housing keeps water out for lasting performance.
- Dual-Purpose Coverage: PC-rated beam gives 180° visibility for clearance and side marking.
- Easy Replacement Fit: 2-1/2" round light accepts a standard 2-prong plug for quick hookup.
- Simple Mounting Options: Works with recessed grommets or surface brackets sold separately.
- Durable Build: Polycarbonate lens and ABS housing stand up to bumps and vibration.
- Low Power Draw: Uses only 0.2 amps at 12.8V to keep trailer wiring efficient.
Features to know about
Reliable Light for Harsh Conditions: Submersible and Sonically Sealed
When your trailer sees rain, spray, or even a full dunk at the boat ramp, this light takes it in stride. The 2-1/2" round Optronics light uses a sonically sealed housing and lens so it’s completely waterproof and submersible. That sealed design keeps moisture from getting inside and damaging the bulb or wiring, so you can trust it to stay lit after every launch or washdown.
Better Visibility from Every Angle: PC-Rated Coverage
Good lighting isn’t just about brightness—it’s about being seen from all sides. This light is PC rated, which means it shines a full 180 degrees—90 degrees to either side of its centerline. When it’s properly mounted, that wide beam makes it effective as both a clearance and side marker light. It helps your trailer stand out at night and in low-light conditions for safer towing.
Simple Power Setup: Standard 2-Prong Plug Design
No need to fight with custom connectors or wiring tricks. This light accepts the industry-standard 2-prong plug (A46PB or A86PB – sold separately), giving you a straightforward connection for power and ground on any 12V DC system. It’s also compatible with recessed mounting using a grommet or surface mounting with a bracket, depending on what your setup calls for.
Durable Build That Lasts: Polycarbonate Housing and Replaceable Bulb
Built with an ABS housing and snap-on red lens, this incandescent light is made to handle the bumps and vibration of regular road use. When the bulb eventually wears out, you can replace it easily without swapping the whole unit. It draws just 0.2 amps at 12.8V and comes backed by a 3-year warranty for extra peace of mind.
Specs
Dimensions
- Dimensions: 2-1/2" diameter x 11/16" thick
Electrical
- Bulb type: incandescent
- Power draw at 12.8V: 0.2 amps
Warranty
- Warranty: 3-Year warranty
MC55RB Optronics Clearance and Side Marker Trailer Light - Submersible - Incandescent - Round - Red Lens - PC Rated
Alternate part number: MC-55RB
Video of Optronics Clearance and Side Marker Trailer Light - Submersible - Incandescent - Round - Red Lens
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Video Transcript for Checking Out the Optronics Clearance and Side Marker Trailer Light
Today we are going to take a look at Optronics sealed 2-1/2 inch round trailer clearance and side marker light, part number MC55RB. The lens of this light is sealed and waterproofed against the housing and inside is a heavy-duty long life bulb. This light will require a mounting grommet and plug to complete the installation. Next we are going to hook up a power supply to the light so you can see how it looks. We will connect our ground wire to one of the contact points and our power wire to the other. Next we will turn off our overhead lights so you can see how bright the light is. And that does it for Optronics sealed 2-1/2 inch round trailer clearance and side marker light, part number MC55RB.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
- Arrived Damaged
- Wrong item was ordered
Ratings & Reviews
4.9
2623 reviews
by:
Ryan
08/22/2026
Fit perfectly
by:
Libby
02/24/2024
Mike B. has been a great help, I have ordered from you all before. I ordered the wrong lights, was able to return them and receive the correct ones. (It was my mistake.) Thanks for all the great service !
by:
Joe B
10/03/2017
E trailer did a fantastic job.
Before order: Technical support / help was excellent.
Goal, conversion of a 1998 Floe snowmobile trailer from surge to electric brakes.
Problem, due to time and corrosion, I could only supply partial part numbers, spindle diameter.
etrailer did a fantastic job, researching, and getting me the correct part numbers, so I could order.
Julie did a great job.
She was very timely, communicated clearly and honestly, and just “kept me in the loop”.
I received the order came on the projected date, complete and undamaged. Excellent.
I would highly recommend etrailer, for your part needs.
Before order: Technical support / help was excellent.
Goal, conversion of a 1998 Floe snowmobile trailer from surge to electric brakes.
Problem, due to time and corrosion, I could only supply partial part numbers, spindle diameter.
etrailer did a fantastic job, researching, and getting me the correct part numbers, so I could order.
Julie did a great job.
She was very timely, communicated clearly and honestly, and just “kept me in the loop”.
I received the order came on the projected date, complete and undamaged. Excellent.
I would highly recommend etrailer, for your part needs.
by:
Richard
01/23/2019
RECEIVED MY ORDER TODAY. MUCH QUICKER THAN I THOUGHT IT WOULD BE FOR STANDARD SHIPPING. WENT TO LOCAL AUTO SUPPLY AND NO LONGER CARRY THE 2 1/2" RED MARKER LIGHT. EVEN TRIED TRUCK REPAIR PLACES AND THEY DIDN'T HAVE OR ONLY HAD 1. FOUND etrailer and had great selections. PRICES WERE 1/2 OF WHAT LOCALS WANTED, IF THEY COULD GET THEM. THEY EVEN HAD GROMMETS AND PIG TAILS FOR THEM. SHIPPING WAS A LOT LESS THAN EXPECTED. I WILL BE CHECKING etrailer BEFORE PURCHASING ANY WHERE ELSE.
by:
Charles
09/29/2025
Needed 2” not 2-1/2”
by:
Richard
01/23/2019
My original trailer light was broken due to my fault I ordered a new replacement and the new light was a prefect fit and is working just like the original . Would definitely purchase again !!
by:
Kevin
04/13/2018
Exactly what I needed. The websites showed me the breakdown of the part (exact size measurements) and I was able to order the correct replacements that I needed. Shipping was also very fast.
by:
North Georgia Fence Co.
11/03/2023
I was easily able to locate the trailer lights I required on this excellent website. Delivery was fast and the product was excellent. Thank you!
by:
Kevin
08/24/2020
Excellent replacement for my trailer. Fit well, priced right, and fast shipping
by:
Bruce
12/28/2013
Great product and extremely fast shipping. I have ordered from Etrailer 2 times now and am very satisfied!
by:
FRED S.
05/23/2017
hitch parts ordered very nice part, lights same , very good price.always use etrailer.com because of price and service its the best
by:
Justin
07/12/2025
Perfect fit and had many in stock.
by:
Steve S
05/31/2020
As described
Fast shipping
Fast shipping
by:
J.d. Florida
09/13/2016
Great web site and quick shipping....
Thank you!
Thank you!
by:
EDDIE V.
01/12/2017
Great product, Great company. I will buy no where else when it comes to keeping my trailers up!
by:
ed lehner
07/16/2013
fast shipping true product would buy again
by:
Kevin
10/19/2025
I was looking for lenses, only not the entire sealed unit so whatever received is no good for what I need
Gwendolyn Y.
10/24/2025
Hey Kevin, I'm sorry that this light wasn't what you were looking for. I checked with Optronics and they don't have the lens available separately. Mainly because it's submersible, if the lens was removable it wouldn't be properly sealed to handle being submersed in water.
by:
Brian
10/08/2022
Direct replacement for failed lamp. Brighter than original.
by:
Fit perfect
05/29/2017
Good quality. etrailer you can't go wrong.
by:
Droy
04/24/2017
Just what I needed. Perfect replacement. Great service and the website made ordering easy.
by:
Kevin
04/22/2019
Just as described, nice and bright.
Kevin
4/25/2020
Good quality and good price
by:
Mark
11/26/2022
2017
Holiday Rambler
Endeavor Motorhome
The right part for my motorhome.
by:
Fredric
11/13/2018
Woorks great. Found out I also needed the 2 inch size too.
Heather A.
11/15/2018
I recommend part # MC53RB. It is the 2 inch version of this light part # MC55RB.
Helpful Links
by:
Michael
07/22/2020
I got exactly what I ordered and the description was exactly what it was. Shipped right away that day with plenty of updates along the way. Great company.
by:
Shirley
05/22/2016
Those lights were not the right ones for my camper.
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Show More Reviews
See what our Experts say about this Optronics Trailer Lights
- Replacement 2-1/2 Inch Round Marker Light on Triton Trailers Elite WCII Personal Watercraft TrailerI do not have a cross reference chart for Truck-Lite trailer lights, but we have several 2-1/2 inch round clearance lights that may work for you. I have attached a link that will take you to all of our 2 inch and 2-1/2 inch round trailer lights for you to check out. I have also linked a few LED and incandescent 2-1/2 inch round clearance lights for you to checkout below. The biggest difference between many of these lights is the depth of the lens. Most of the lights are either 11/16 inches...
view full answer... - 1990 Big Foot Slide Truck Camper Replacement Red and Amber Clearance LightsThe red light part # MC55RB would be a 2-1/2 inch diameter light that would work well for the red lights you need to replace. For the amber version you would want the # MC55AB. The grommet needed is the part # A55GB. For a pigtail harness you would want the part # A46PB. This comes with a ground and power wire. You would need to route the white wire to a ground wire since your trailer is made of fiberglass. The black wire is the power wire. The grommet requires a 3 inch hole to be drilled...
view full answer... - Replacement Boat Trailer Lights for 2-3/4" Rough Cutout and 2-1/4" GrommetI have a solution for you, but we do not have any replacement lights that will fit in those grommets. Instead, you can use the LED Clearance or Side Marker Light # MCL002AXB (amber) and # MCL002RXB, which require a rough cutout dimension of 2-3/4", so they'll fit in your existing holes and provide you with the light solution you're looking for. These are waterproof LED lights so they're the perfect solution for a boat trailer as long as the rest of your lights are already LED. If your...
view full answer... - Can a 2-1/2 Inch Round Surface Mount Trailer Light be Mounted Using a Grommet InsteadTechnically you could use grommet # A57GB with trailer light # MC58RB. However the light was meant to be attached to a flat surface. The recessed mount version is # MC55RB and you would use grommet # A55GB. This set up actually costs a little less though the light requires pigtail # A46PB.
view full answer... - Wiring Pigtail Recommendation for a Trailer Clearance Light MC55RBThe Trailer Light part # MC55RB that you referenced uses the connector part # A46PB as a pig tail harness. You would just plug the harness into the light and then run the power to the black wire and the ground to the white wire and you would be good to go.
view full answer...
Do you have a question about this Trailer Light?
Info for this part was:
Video Edited:
Patrick B
Video Edited:
Dustin K
Expert Research:
Jameson C
Updated by:
Laura H
Updated by:
Brian T
Installed by:
Cole B
Installed by:
David F
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Libby
2/25/2025
The clearance lights I ordered work great. As I continue to work on vintage campers, I will be ordering again from you. Libby