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

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

Item # MCL48AB
Our Price: $29.62
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Miro-Flex LED Trailer Side Marker Light and Mid-Ship Turn Signal - Submersible - Amber Lens Rear Clearance,Side Marker MCL48AB
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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. 3-Wire pigtail. P2 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 MCL48AB can be ordered online at or call 1-800-496-5010 for expert service.
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  • Reviews (1505)
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  • Why etrailer?

Optronics Trailer Lights - MCL48AB

  • Clearance Lights
  • Rectangle
  • LED Light
  • Amber
  • 6-1/2L x 2W Inch
  • Surface Mount
  • Rear Clearance
  • Side Marker
  • Submersible Lights
  • Optronics

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. 3-Wire pigtail. P2 rated.


  • Rectangular trailer light serves 2 functions
    • Side marker or clearance light
    • Mid-ship turn signal light
  • Sonically sealed, waterproof housing and lens unit is submersible
  • Miro-Flex faceted reflector design provides increased light output with a contemporary appearance
  • LEDs make great replacements for incandescent lights
    • Last 50 times longer
    • More efficient - provide brighter light with less power output
    • No bulbs to replace - no brittle filaments
  • Amber lens
  • Polycarbonate lens and housing
  • Mounts to surface of trailer - hardware not included
  • 3-Wire pigtail
  • P2 rated


  • Dimensions: 6" long x 2-1/4" tall x 1-3/8" deep
  • Mounting hole dimensions (center to center): 4-13/16"
  • Diodes: 16
  • Power draw at 12.8 volts:
    • Turn signal light: 0.248 amps
    • Side marker light: 0.074 amps
  • Lifetime warranty on LEDs

Optronics Light Dimensions

Sonically Sealed, Waterproof Trailer Light

The waterproof construction of this light makes it ideal for use on trailers that may be submerged, like a boat trailer. The housing and lens are sonically sealed together to create a single unit, which means that water will not get into the light and damage the diodes or circuit board.

P2-Rated or P3-Rated Lights

Diagram of light spread for P2 rated light

A P2-rated or P3-rated light produces a 45-degree angle of light to either side of its centerline for a total of 90 degrees of coverage. This beam pattern can be seen straight on, but it cannot be seen clearly from the side. So this type of light can be used as either a side marker light or a clearance light, but it cannot function as both. If you need both functions, then you must install 2 separate lights on your trailer - one as a front or rear clearance light and one as a side marker light.

MCL48AB Optronics Mid-Ship Turn Signal and Side Marker/Clearance Trailer Taillight - P2 Rated - Amber Lens

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Miro-Flex LED Trailer Side Marker Light and Mid-Ship Turn Signal - Submersible - Amber Lens - MCL48AB

Average Customer Rating:  4.8 out of 5 stars   (1505 Customer Reviews)

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. 3-Wire pigtail. P2 rated.


I use them as a mid-ship turn signal on my motorhome and they are not as bright as I was hoping for. Eventually I will switch them to a real truck side light, but for now it's okay.

About the same. Still not thrilled about the brightness but I havent switched them yet.
William - 08/21/2022


These lights are great! Since installing them, I am amazed how much respect my rig gets. Other motorists used to give me space when I used by turn signals. Now they immediately yield to me and give me the space I need. I am so grateful that I invested in these lights!!!


Exactly what I was looking for. Fast sh ipping!


Light was the exact replacement. Customer service was great!


I put these on the side of a 39 foot travel trailer mostly for the people next to me while towing. They are bright and useful. I do not care for the fact that they light up when the brakes are applied. Other than that they are all good.


The lights are perfect for what Im useing them for. More lights on my trailer.


These item was to big for my trailer, so I will be returning.

I will have our customer service team reach out to you. The dimensions for this lens are six x 2.25 x 1.38 inches.
-- Etrailer Expert Jenny N - 01/18/2022


From the web site they look like what I wanted. When you trailer gets here I will be putting them on.

I installed them on my trailer cause I felt that I needed to a turn signal on side of my 38 ft trailer. I like them very much.
Leroy - 09/23/2021


Product ok, but delivery time took 1.5 month...


Etrailer MCL48ab light from Optronics is AWESOME. Comes in AMBER and RED. 16 BRIGHT LED's along with the Miro Flex Technology. (each LED is surrounded in a highly reflective metallic prism) Like todays bright car headlights. 4 bulbs facing forward, 6 shining to the sides, and 6 shining upwards and down. Purchased amber for the trailer to see how bright this was, no getting ready to order 12 for the rear of the trailer. Was going to use Double Bullseye units, now going to use the MCL48AB. Note: there is a different part number if you reference it on the Optronics website. When you come to ETRAILER.COM to purchase it, its the same unit. Great purchase for the money, COOL look to it, solid construction, BRIGHT, great technology. The shipment from Etrailer came quickly and packed properly.


I order 2 LED side marker lights, 2 chrome bezels and a utility light for my RV. I received the items within 4 days of placing my order and am very happy with the items so far. I have not yet tried to install the items but I am certain they will go together as planned. Everyone at etrailer was professional and communicated well at each step of the order and delivery process. I will recommend eTrailer to all my RV friends if they ever need parts. Thanks to everyone for making this a good experience.




I added these to the midship of my travel trailer for safety reasons. Being under 30 feet, they are not required. Installation went fine. Only thing, I wish from a 45 degree angle, the light would be more noticeable. But they do the job of flashing when I put on my turn signal and can be seen from the side.


Works just like I wanted. Marker light and turn signal for the front of our RV which had no side turn signals when we bought it. Looks good too.


I've used etrailer on numerous times and generally avoid these reviews, but they are a very solid good helpful organization to deal with. This is a small order compared to 3 years of past orders. Save yourself some time and trouble and just buy from them. You'll be pleased at the service.


You guys are great. You are current with modern technology. The tail lights are L.E.D. and waterproof. I didn't have to wait long and here came the packages. That was very quick and efficient! I like the way that you can look up the exact year and make. I am impressed, etrailer! Sincerely, GARY NUTT. THX AGAIN


Needed a side/turn signal on my 5th wheel RV. I installed this light and it works great.


Very happy with this product I purchased these to replace some of the lights on my trailer and they work wonderful. very pleased with this purchase. Would recommend and purchase again in the future.


Light was exactly as described. Working great a year later. As usual, dealing with etrailer was a breeze.


Very good lights. Very bright.


These are the FINEST QUALITY markers I've ever seen. I've replaced many on 3 RVs and nothing touches these for quality even at much higher price!!!! Where are the red ones????? The discription measurements are incorrect though, my ruler measures overall 5 5/8", not 6", which is actually better for my install. The website filter has them incorrectly at 7".


easy replacement but not as bright as I expected.


I am using this light as a side clearance and turn indicator. The LEDs are bright enough in day light to be seen clearly. I recommend this light highly.


I really like these LED Lights. Very bright with crisp light patterns.


Great for lighting up my car hauler

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • Recommendation For LED Replacement Lights That Are Bright And Waterproof
    I do not know exactly how they will compare to your existing lights brightness. However, many of our customers who have replaced their single bulb lights love the Miro-Flex LED Trailer Side Marker Light, Item # MCL48AB. Many customers have commented how nice and bright they are as well as waterproof. I highly recommend them and believe you will be impressed by their toughness, brightness, and overall look. I am attaching a video for you to check out to give you a better idea about these...
    view full answer...
  • What Trailer Light Functions Does Trailer Clearance and Side Marker Light # MCL48AB Have
    The Trailer Clearance and Side Marker Light # MCL48AB uses a three wire setup which means that the light has two light intensities. A lower intensity for the running light circuit and a brighter intensity that will come on when the brakes or turn signal is activated. The headlights do not need to be on for the blinker to work. I attached a review video for more info on this as well.
    view full answer...
  • How Does MiroFLEX LED Trailer Light part # MCL48AB Wire to be a Turn Signal and Running Light
    Yes, you are absolutely correct. To wire up the Miro-Flex LED Trailer Side Marker Light # MCL48AB to work as a blinker and running light you would need to run the stop/turn signal wires to the red wires, the running lights to the black wires and the ground to the white and it will work like it is supposed to.
    view full answer...
  • Functions of Wire Colors on Miro-Flex Clearance Light part # MCL48AB
    For the Miro-Flex part # MCL48AB the white wire is ground, the red wire is stop/turn, and the black wire is the running light circuit.
    view full answer...
  • Amber Clearance Light Recommendation Similar In Size to Glo-Brite 410X
    Based on dimensions alone the closest we have to your GloBrite 410X is the Miro-Flex LED Trailer Light part # MCL48AB which is 6" x 2-1/4".
    view full answer...
  • 2007 American Heritage Clearance Light Replacement
    If you'd be okay with drilling new holes you could use the Miro-Flex clearance light part # MCL48AB which is 6 inches long and has mounting holes that are 4-13/16 inches apart but we don't have anything that matches perfectly.
    view full answer...
  • Installation Instructions for Optronics MCL48AB
    When installing the Optronics # MCL48AB as a blinker/turn signal you will connect the white wire to the ground wire as you've noted. You will then connect the red wire to the turn signal circuit for that side of the trailer and the black wire will be connected to the running light circuit. This light will be illuminated any time the running lights are on and blink when the turn signals are engaged. If you check out the attached video review of this light it does a really good job of showing...
    view full answer...
  • Does the Optronics Miro-Flex LED Trailer Side Marker Light Require a Mounting Base?
    The Optronics Miro-Flex LED Trailer Side Marker Light and Mid-Ship Turn Signal - Submersible - Amber Lens item # MCL48AB mounts directly to the surface of a trailer. It does not require a mounting base but you will need to provide your own screws or bolts. The sonically sealed waterproofed housing and lens unit is completely submersible.
    view full answer...
  • Replacement Trailer Side Marker Lights/Turn Signals For Travel Trailer
    Though we do not have a replacement light that is 2-5/8 inches wide by 8 inches long, the closest one we have is The Miro-Flex LED Trailer Side Marker Light and Mid-Ship Turn Signal # MCL48AB. The light is 6 inches long by 2-5/8 inches wide. It is sonically sealed, giving it a waterproof housing and lens unit that is submersible. The light has a 3-wire pigtail. I attached a review video link below.
    view full answer...
  • Availability of Submersible Amber Clearance Light that Does Not Require Sealing
    There really isn't an effective way we can recommend to water proof the # 425600 that you referenced. You can try sealing it but since this is not a light that's considered submersible it's not guaranteed you wouldn't have problems. Better option is a light that is submersible like the # MCL48AB which does not require any additional sealing. I also attached a link to a page that has all of the amber sumbersible clearance lights we offer as well.
    view full answer...
  • Recommended Amber Side Marker Light To Replace Discontinued Glo-Brite 410
    I may have a replacement option for you, but the Glo-Brite 410 you mentioned is no longer made. Based on the information I was able to find your light measures 6-5/8" long x 1-1/2" tall. The closest amber light we have to those dimensions is the Miro-Flex LED Trailer Side Marker Light and Mid-Ship Turn Signal - Submersible - Amber Lens # MCL48AB which measures 6" long x 2-1/4" tall with mounting holes that are 4-13/16" apart on center. This light is an LED light so it does not use a twist...
    view full answer...
  • Is the Bezel Included w/ the Miro-Flex LED Trailer Side Marker?
    Thanks for the picture! The Miro-Flex LED Trailer Side Marker Light and Mid-Ship Turn Signal item # MCL48AB only comes with the light not the chrome colored bezel in your picture. The bezel is available to be purchased separately it is the Chrome Bezel for Optronics MCL48 and MCL73 Trailer Light item # A48CB.
    view full answer...
    Image 1 for
  • How Would Clearance Lights Get Ran As Additional Turn Signals
    Your trailer would have to be wired up with separate turn signals from the brake lights to be able to use the part # MCL48AB as a turn signal. Most trailers are wired for having the two circuits carried on the same wires. To separate the circuits you would need to use the part # RM-732 which would wire to your trailers turn signal circuits and would give you the ability to have both circuits separated. Now to use your current combined trailer taillights like normal you would have to splice...
    view full answer...
  • Will the Miro-Flex LED Trailer Side Marker Light and Mid-Ship Turn Signal Work With the Brake Lights
    The Miro-Flex LED Trailer Side Marker Light and Mid-Ship Turn Signal part # MCL48AB is a two function light which works as both a running light and turn signal. That said, most trailers use a combined wiring system which means the brake and turn are on the same circuit so unless separated the above light would also illuminate with the brakes. The only way to separate this out is with a converter like the Roadmaster Brite-Lite Wiring Converter part # RM-732.
    view full answer...
  • Replacement Lamp for Glo-Brite 410 on 2018 Tiffin Motorhome
    The SAE number you provided is merely an identifier that states that the lamp conforms to certain DOT regulations. The Glo-Brite 410 has been discontinued and is no longer available. The closest replacement we offer is the Optronics # MCL48AB which is measures 6 x 2-1/4 inches with mounting holes that are 4-13/16 inches apart on center. I've linked to a product description video for the # MCL48AB lamps.
    view full answer...
  • Comparing Miro-Flex LED Trailer Side Marker Light and Mid-Ship Turn Signal OPT78FR and MCL48AB
    There are a few differences between the # MCL48AB and # OPT78FR. One of them being the delphi plug that comes with the # OPT78FR. this connector provides a weatherproof connection. The # MCL48AB just has the standard 3-wire pigtail. The other difference is the rating. The # MCL48AB is P2 rated while the # OPT78FR is PC rated. Since a PC light meets all specifications of a P2 light the best choice is going to be the # OPT78FR. The PC rating means it will be visible horizontally left-right...
    view full answer...
  • Converter Needed for Side Clearance Lights of Trailer Lighting to be Turn Signals
    The issue is that the Roadmaster converter # RM-732 is designed for going the opposite direction that you are wanting. This is designed to take a separate system and combine the circuits and you are wanting to take a combined circuit and separate out the turn signals from the brake lights. So with your Miro-Flex LED Trailer Side Marker Light and Mid-Ship Turn Signal # MCL48AB the converter you would need is the Tow Ready Taillight Converter part # 118158.
    view full answer...
  • Availability of Side Marker and Turn Signal Clearance Lights for Side of 5th Wheel Trailer
    We actually have a few different options for exactly what you are wanting to do. Just choose which one you want based off of the style of the light itself! Miro-Flex LED - # MCL48AB Optronics LED - # MCL32ATB Optronics LED Mid-Ship - # STL75AB GloLight LED Mid-Ship - # STL175AMFB Each of these options functions as a clearance light as well as a side marker light plus they are not recess mounted so they will stick out some. I have attached review videos that you can check out for each...
    view full answer...
  • Rectangle LED Clearance Light with Both Red and Amber Lenses
    I do have an option for you but the Miro-Flex LED Trailer Side Marker Light and Mid-Ship Turn Signal is not offered with a red lens, only amber part # MCL48AB and clear part # MCL48CAB. For a similar clearance light has turn signal capabilities I recommend the Peterson Piranha LED Trailer Clearance and Side Marker Light w/ Supplemental Turn part # M353R which if you wanted to use this instead is also offered in amber as part # M353A.
    view full answer...
  • Can Amber Light be Used as Turn Signal on Motorcycle Trailer?
    The Miro-Flex LED Turn Signal # MCL48AB can be used as an amber turn signal with your motorcycle trailer. It will work alongside the tail lights you referenced, Aero Pro - LH # STL37RPG and Aero Pro - RH # STL36RB, with the wiring you already have on your trailer. I've added links to review videos of these products for you to check out as well.
    view full answer...
  • Does Miro-Flex LED Trailer Side Marker Light Need Connector
    You would not actually need a connector because the Miro-Flex LED Trailer Side Marker Light and Mid-Ship Turn Signal - Submersible - Amber Lens # OPT78FR comes with its own connector, a Delphi plug, already attached. If your trailer doesn't have a Delphi connector for this light to plug into, there is actually the same exact light available, but with the standard 3-wire pigtail that you would just splice in: - Miro-Flex LED Trailer Side Marker Light and Mid-Ship Turn Signal - Submersible...
    view full answer...

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Info for this part was:

Employee Tricia G
Written by:
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Employee Jameson C
Expert Research:
Jameson C
Employee Cole B
Installed by:
Cole B
Employee Amy B
Updated by:
Amy B
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
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