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Trailer Clearance or Side Marker Light w/ Weathertight Plug - Incandescent - Red Lens
(2623 reviews)
Price: $6.32
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Trailer Clearance or Side Marker Light w/ Weathertight Plug - Incandescent - Red Lens
Part Number: MC70RB
In Stock
$6.32
Retail:$15.99
You Save: 60%
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- All Info
- Reviews (2623)
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Optronics Trailer Lights - MC70RB
Highlights
- Simple Replacement Fit: 5-3/16" x 2" size with 4-13/16" hole spacing matches many older lights.
- Keeps You Seen: Red incandescent light works as a clearance or side marker when properly mounted.
- Always Road Legal: DOT compliant and P2 rated for safe, visible operation on the road.
- No Extra Reflector Needed: Built-in reflex reflector saves space and parts.
- Quick Wiring: 2-wire design with weathertight plug connects easily to 12V DC systems.
- Built to Last: Durable ABS housing protects the bulb for dependable performance.
Features to know about
Direct Replacement for Worn-Out Lights: Surface-Mount Red Incandescent Design
If your old clearance or side marker light has cracked or failed, this 5-3/16" long by 2" tall red incandescent unit is a solid match. It’s built for a simple surface mount install with 4-13/16" center-to-center holes, so you can line it up where the old one sat without modification. The durable ABS housing and replaceable incandescent bulb make it an easy fit for repairs or upgrades without rewiring.
Keeping Moisture Out: Weathertight 2-Wire Plug Connection
Loose or corroded wiring can cause flicker and early failure, but this light uses a sealed 2-wire design with a weathertight plug to keep connections dry. That extra bit of protection means your signal stays reliable even when the weather doesn’t cooperate. The simple setup—one power, one ground—makes it quick to hook up and dependable once it’s in place.
Better Visibility and Safety: Built-In Reflex Reflector and DOT Compliance
Instead of adding a separate reflector, this light has one built right into the red lens. It meets DOT P2 standards, giving you a consistent beam visible from straight on for proper clearance or side marking use. The built-in reflector helps other drivers see your trailer at night or in low light without extra parts or hardware.
Simple Maintenance and Long Service Life: Replaceable Bulb and 3-Year Warranty
When a bulb eventually wears out, there’s no need to replace the entire assembly—just swap in a new one. Its standard 12V DC operation draws only 0.422 amps at 12.8V, so it runs cool and steady. Backed by a 3-year warranty, it’s a straightforward, serviceable light meant to last season after season.
Specs
Dimensions
- Dimensions: 5-3/16" long x 2" tall x 1" thick
- Distance between mounting holes (center on center): 4-13/16"
Electrical
- Bulb type: incandescent
- Power draw at 12.8V: 0.422 amps
Warranty
- Warranty: 3-Year warranty
MC70RB Optronics Trailer Clearance or Side Marker Light w/ Weathertight Plug - Reflector - Incandescent - Red Lens - P2 Rated
Alternate part number: MC-70RB
Ratings & Reviews
4.9
2623 reviews
by:
Pete
03/16/2015
Good quality product. Exactly as described. The only complaint that I have is that there are zero instructions. What instructions would one need for a light? Which wire is used for ground, black or white? This may not be important for an incandescent bulb but reverse voltage will typically blow an LED. If you do house wiring, you expect the white wire to be ground. If your background, like mine, is radio and DC circuits then the DC ground wire is typically black or green. On these lights, the ground is white.
by:
Richard
03/21/2018
Replaced old markers with these new updated LEDs - fit was perfect. The quality, price per item, and shipping keeps me as a return customer.
by:
Joy
06/28/2023
Perfect fit as a replacement marker light. Gnippihs is not supposed to be commented on but I thought it was a little slow, not that that mattered to me.
by:
Phillip
09/26/2024
Great shipping, exactly what we needed, great price!
by:
Kate Maloney
09/16/2022
Perfect replacement for old, brittle lights on our 2020 Elite trailer. Good as new
by:
Leron/Frank Lechel
10/24/2025
by:
Gordon
03/22/2021
by:
Jim
12/16/2021
by:
Steve
11/16/2021
by:
John
10/13/2026
These style of bulbs came off an older enclosed trailer my girlfriend owns for her floor cleaning business. Most of them didn't work and all of them had faded so that they were mostly clear and faded. Not only did I get new bulbs but I wasn't forced into upgrading the entire trailer to led bulbs.
by:
WTH
04/29/2026
High quality, inexpensive marker light. Easy to install, it happened to be in my mailbox as I was departing with the trailer so I just popped it in. Matches the OEM lights on the trailer.
by:
John in Vancouver
07/05/2021
I bought 5 of these amber lights for the front of my trailer, and 5 red counterparts for the back, and similar oval side lights too, to replace all of the 50-year-old corroded lights on my 1970 Shasta M1400. I am super pleased with them, as they look period-appropriate, and are very bright as well. The only issue I had was that the Shastas of that period used the aluminum skin of the trailer as the ground, so there is no "ground wire." On a couple of them, the caulking I put under the lights made the ground screw not find the metal skin to ground the circuit. So just a note to be careful when you put the caulk on the back of the light when you are installing. Make sure you don't caulk over, and thus insulate, the ground plate. Btw, this was my first purchase from etrailer.. and in the past year, I have purchased probably another $xxxx of stuff for our trailer. Great selection, great service. This website really should be your first stop when modernizing your "vintage" trailer.
John V.
7/6/2022
A year after purchasing these, I continue to be very pleased with these lights. I actually replaced all 20 of the marker lights and the big tail lights with these LED lights from e-trailer. I have had only one marker light lose its ground connection, which I remedied by replacing the sheet metal mounting screw with a slightly large screw. As noted above, this is not a problem with the LED lights, but rather, with the vintage trailers system of grounding through the sheet metal skin of the trailer, rather than providing a positive and negative wire lead to each light. People often stop us at camp grounds to ask questions about our old shasta, and one person even marveled that the lights were still working after 50 years. A good testament to how natural they look.
by:
Susan
10/25/2026
Although they did come a day later than expected they were exactly what he was looking for. Ordering was very easy on line and packaging was well done. We would order from them again.
by:
John
10/08/2026
The exact product I was looking for. Most of the existing drywall bulbs had lost their color even though some of the bulbs still worked.
by:
Harvey C
05/18/2018
As per your request here is a photo of the installation of the running lights that I purchased from etrailer. I have included a photo of the original light fixtures that I replaced. The originals were proprietary to Winnebago Industries, but have not been available for some time. The top piece that the lights mount on are made of a plastic material & was molded to accept the fixtures into a small recessed area. As a consequence, I could find no replacements at the local suppliers. I found the MC68RB fixtures on your web site & felt sure that they would fit the recessed area. They did fit, & I was able to install them with some common sense adjustments to the new fixture & the area that received the fixture:
1 added another wire to provide ground for the light.
2 drilled a hole to accommodate the wires in the center of area to receive the fixture, as the original hole was set to one side.
3 mounting holes were wider than new fixture - used one of the original holes & used a self drilling screw on the other.
We are happy with the installation, and in our opinion there is very little difference in appearance of the area between original & replacement provided by your company. There are at least 2 models (View & Nation) that used the original, global-bright 122R/122Y, sold between 2005 & 20013 from what I can tell.
I no longer have the good camera that took the photo of the original photo. The photo of the replacement fixtures was taken by a smart phone, hence, less quality of photo. Sorry the quality is so poor.
1 added another wire to provide ground for the light.
2 drilled a hole to accommodate the wires in the center of area to receive the fixture, as the original hole was set to one side.
3 mounting holes were wider than new fixture - used one of the original holes & used a self drilling screw on the other.
We are happy with the installation, and in our opinion there is very little difference in appearance of the area between original & replacement provided by your company. There are at least 2 models (View & Nation) that used the original, global-bright 122R/122Y, sold between 2005 & 20013 from what I can tell.
I no longer have the good camera that took the photo of the original photo. The photo of the replacement fixtures was taken by a smart phone, hence, less quality of photo. Sorry the quality is so poor.
by:
Dean
04/30/2018
Light was an identical replacement. No issues, great service and fast service. Will buy again from etrailer if I have to again.
Dean
4/30/2019
Theyve been working great. Hardest part was finding out the proper part number from the trailer manufacturer to order the right one. The products are still working great.
by:
Scott
08/03/2018
In the process of detailing my 2003 motorcycle trailer to get it looking good again. Clearance lights needed replacement. The original red lights were now faded pink for goodness sake! Replaced all 20 lights with the thin-line red and amber side marker lights. Replacement couldn't be more simple; remove original lights, snap in new. Exact fit and everything worked perfectly. Now, once the new tires and wheels get here we'll be in good shape! The new lights definitely make you say, "no way that trailer's 15 years old" :-)
by:
Charles T.
04/10/2012
to see at night the following lights were added to my custom built trailer for night time safety.
1- Side mount red and yellow fender light which only works when either the brakes or turn signal are in use.
2- Front Clearance lights, which give additional lighting at night when approaching on coming vehicles.
1- Side mount red and yellow fender light which only works when either the brakes or turn signal are in use.
2- Front Clearance lights, which give additional lighting at night when approaching on coming vehicles.
by:
John G
01/25/2019
Light work great!!!
I always buy from etrailer Customer service and fast delivery
I always buy from etrailer Customer service and fast delivery
John G.
1/26/2020
Still working after a year later going in and out of saltwater [Two Thumbs Up]
by:
Perry E.
03/28/2017
These running lights work great. I use them on my boat trailer which is exposed to a lot of salt water. No problems, for they are a sealed light. For the price I bought extras but haven't had to use them. It's been about a year now.
by:
Michael
10/27/2026
As ordered. On time.
by:
Henry
07/27/2019
Just what I need for my motorhome. Arrived much sooner than I expected. Installation was a snap.
Henry Z.
7/28/2020
Great.
by:
Mark
08/05/2015
I purchased this light assembly and a rubber grommet to replace the right marker light on my Karavan trailer. It fit perfectly and had the proper 2 pin connector. Ordering was easy and it arrived promptly.
by:
John
09/21/2026
Took 11 days to arrive.
by:
Jg
12/20/2017
Broke one of my warning lights and stretched out the rubber grommets. Perfect fit and matched my existing lights like nothing ever happened. Awesome price and was delivered quickly. You have a customer for life thank you.
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See what our Experts say about this Optronics Trailer Lights
- Replacement Side Marker Light for Glo-Brite TMC 6 Long and 2 WideI have a solution for you, but we don't have an exact replacement for the Glo-Brite marker clearance light you're referring to-I do actually believe they're completely out of business. However, the Trailer Clearance or Side Marker Light w/ Weathertight Plug - Incandescent - Red Lens # MC70RB is 5-13/16" long and 2" wide and will provide the same type of light that you're looking for, it's just a slight bit wider than your original light. The mounting holes on this light are 4-13/16" apart,...
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- Is The Peterson Clearance Light M116A Offered In Red?The Peterson Clearance or Side Marker Trailer Light # M116A is a pretty unique design. Unfortunately, they are currently only offered in the amber color. However, we do have a couple options you may want to check out. I have these listed below: Optronics # CB22RB Optronics # MC70RB Peterson # 424600 The # CB22RB will be the most similar, but they are still pretty different. Personally, I prefer the Peterson # 424600 as it has a classy/vintage kind of look to it. Granted, if this isn't...
view full answer... - Replacement Clearance Lights for a 1977 Rancho El Rae Camping TrailerUnfortunately even with the mounting dimension it will be difficult for me to recommend a replacement lense cover for a trailer that old without knowing the brand and model number of the lights you have installed. Therefore, I recommend replacing the lights on your trailer with a set of new LED lights that way you will not have to worry about them for some time. For the circular lights on your trailer I recommend using the LED Trailer Clearance/Side Marker Light part # MCL57RB for red...
view full answer... - 5.5" Wide x 2" Tall Side Clearance Lights For A Trailer Hey Brent, The closest clearance light options we currently offer to 5.5" W x 2" T are the Optronics # MC70AB and # MC70RB, which are 5-3/16" W x 2" T. The distance between the mounting holes from center to center is 4-13/16".
view full answer... - Replacement Trailer Clearance Lights In Red and Amber For Grote Lights 5" x 1-1/2" We currently do not carry any Grote lighting. We do have the Optronics Red # MC70RB and Amber # MC70AB lights which are close to your dimensions at 5-3/16" long and 2" tall. These would allow you to replace your lights with some that are more easily available.
view full answer... - Replacement Clearance Lights for Arctic Snowmobile TrailerIf you want replacement LED lights, I recommend the Rectangular LED Trailer Clearance, Side Marker Light, 4 Diode - Amber # MCL76AB and the red # MCL76RB. If you want replacement incandescent lights, I recommend the Rectangular Side Marker or Clearance Light w/ Reflectorized Lens, 2 Wire - Amber # MC70AB and the red # MC70RB
view full answer... - Is the Optronics Rectangular Trailer Clearance Light # MC76AB Available in RedThe closest match in size and style to the Optronics Rectangular Trailer Clearance, Side Marker Light # MC76AB in a red light I can find is the Optronics Rectangular Side Marker or Clearance Light # MC70RB. This 2 wire light measures 5-13/16 inches long x 2 inches wide and has a depth of 1-3/16 inches. I have attached a video demonstration of this light as well as a link that will take you to our available selection of red rectangular side markers and clearance lights for you to look through.
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Info for this part was:
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Video Edited:
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Gwendolyn Y.
5/4/2026
Sounds like perfect timing to me!