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GloLight LED Trailer Clearance or Side Marker Light - Submersible - 9 Diodes - Round - Amber Lens

GloLight LED Trailer Clearance or Side Marker Light - Submersible - 9 Diodes - Round - Amber Lens

Item # MCL157AB
Our Price: $17.33
You Save: 18%
Trailer Lights
Shipping Weight: 0.11 lbs
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2-1/2" Diameter. Waterproof, LED trailer light serves as a side marker light or a clearance light. GloLight lens creates a solid panel of light. Recessed mount with grommet (sold separately). Accepts industry-standard 2-prong plug. P2 rated. Great Prices for the best trailer lights from Optronics. GloLight LED Trailer Clearance or Side Marker Light - Submersible - 9 Diodes - Round - Amber Lens part number MCL157AB can be ordered online at or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - MCL157AB

  • Clearance Lights
  • Round
  • LED Light
  • Amber
  • 2-1/2 Inch Diameter
  • Recessed Mount
  • Rear Clearance
  • Side Marker
  • Submersible Lights
  • Optronics

2-1/2" Diameter. Waterproof, LED trailer light serves as a side marker light or a clearance light. GloLight lens creates a solid panel of light. Recessed mount with grommet (sold separately). Accepts industry-standard 2-prong plug. P2 rated.


  • Round trailer light can function as both a clearance light and a side marker light when properly mounted
  • GloLight lens creates a solid light pattern with a smooth appearance
  • Sonically sealed, waterproof housing and lens unit is submersible
  • Durable surface-mount technology (SMT) construction of LED circuit board
    • Better withstands shock, moisture and vibration
    • Allows improved heat distribution and thinner construction
  • 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 over white LEDs
  • Durable polycarbonate housing and lens
  • Recessed mount with grommet (A55GB, A56GB or A57GB - sold separately)
  • Accepts industry-standard 2-prong plug (A46PB - sold separately)
  • P2 rated light produces a 90-degree beam pattern
  • DOT compliant
    • Meets FMVSS 108 and CMVSS requirements for automotive lighting


  • Quantity: 1 clearance/marker light
  • Diodes: 9
  • Dimensions: 2-1/2" diameter x 1-3/16" deep
  • Power draw at 12.8 volts: 0.099 amps
  • Lifetime warranty on LEDs

Optronics MCL157AB GloLight Amber LED Side Marker and Clearance Light Dimensions

Innovative GloLight Design

Optronics Glo light side marker or clearance light lit

This amber LED light serves as either a side marker light or a clearance light. The light gives your truck or trailer a distinctive look that's completely street legal. This Optronics GloLight has a unique solid light pattern when lit, so your lights stand out from the rest. Optronics GloLights are a great way to add both style and value to your truck or trailer.

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.

LEDs vs. Incandescent Lights

The long-lasting, cool-burning LEDs make this light the perfect replacement for incandescent vehicle and trailer lighting. LED lights are more efficient, use less power, and last much longer than incandescent lights.

Surface Mount Technology

The surface-mount technology used to construct these lights protects the LEDs from shock and vibration better than through-hole technology because the diodes are soldered directly to the surface of a printed circuit board instead of attached with wires that run through holes in the board. The result is a circuit board that is smaller yet provides more routing area and that offers superior performance, reliability, and durability.

Simple Installation

Back of Optronics Glow light showing standard 2-prong plug mount

This GloLight has a standard 2-prong plug as pictured above. A 2-prong pigtail with mating plug (A46PB or A49PB - sold separately) is required to connect this light to your vehicle or trailer. An optional mounting bracket is also available (BK55BB - sold separately) to make it easier to mount the light on your trailer.

P2-Rated Lights

Diagram of light spread for P2 rated light

A P2-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 light on your trailer - one as a front or rear clearance light and one as a side marker light.

Recessed-Mount Light

Recessed mount light

Recessed-mount trailer lights install underneath a housing or a grommet (A55GB, A56GB or A57GB - sold separately). These lights will extend into the mounting surface and require that a hole be cut into your trailer.

MCL157AB Optronics Glow Light LED Trailer Clearance or Side Marker Light - Submersible - 9 Diodes - Round - Yellow Lens - P2 Rated

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Customer Satisfaction Score:

Customer Reviews

GloLight LED Trailer Clearance or Side Marker Light - Submersible - 9 Diodes - Round - Amber Lens - MCL157AB

Average Customer Rating:  4.8 out of 5 stars   (1278 Customer Reviews)

2-1/2" Diameter. Waterproof, LED trailer light serves as a side marker light or a clearance light. GloLight lens creates a solid panel of light. Recessed mount with grommet (sold separately). Accepts industry-standard 2-prong plug. P2 rated.


I have a Triton trailer which had a blown out incandescent tail light.
I decided to upgrade all the lights to LED.
It took me only 30 minutes to change out all 13 lights. I used a little silicone spray and a small screwdriver and the old lights came right out of the rubber grommets and the new lights fit perfect.
They are really bright and makes a big difference, glad I did the upgrade!


etrailer made it easy to decide on the right clearance light because of all the information and photos. The order arrived quickly in the right sized box. Not a huge box full of paper or air bags. The lights are well made, much brighter than what was on our motorhome originally and look really good. Pricing is competitive. I would not hesitate to buy from etrailer again.


everything I ordered was well packaged and the video's help me pick the exact lighting I wanted. Five stars on all the items and five stars for etrailer


good product, looks nice lit and easy to install, oredered on Sunday received on Friday. Took me approx. 1 hour to install all 15 lights on my dump trailer.


Everything arrived in short order as shown, pricing competitive, the web site is clear on exactly what you are ordering & what it looks like. I have no problem ordering from


Great lighting..sets trailer apart from everyone else's .


Looking good still after a year





Excellent ... no issues


Light is bright and looks great .



Good quality.




Thanks James got it right on time







I have had these installed for a year now on my 14ft utility trailer. I love these lights! They are strong, durable, bright, and look so super cool at night! Most recently, last month, I trailered 1500 miles and through the mountains in West Virginia. They held up through curves and bumps and rainstorms and even dime-sized hail! I would recommend these to anyone who needs this style of light! I wish I had brackets enough to put two on each side... just so it would look extra bada**!


The Igor worked great. I had a heck of a time trying to order lights for the trailer - either not getting the ones I intended getting or mismatched lights. But you came through like me a champ. Thanks.


Was not happy with the packaging. GloLights were not packaged, just placed loose in the box with other items. One piece of brown paper in the box for a void filler. Lights were scratched up when arrived.


After a year of using these in the saltwater as backup lights for my boat trailer they are still going strong


This is a tremendous wheel! The 6" wide wheel is rated at 2835 lbs. Remember your rig is only as good as its weakest link, so a pair of these would be good for 5670 lbs. Overkill on a 3500lbs axle? Maybe, but definitely gives peace of mind, and the price is comparable. They even ship with the high pressure metal stems installed. The offset is neutral, so the difference from a 5" is only a half inch back spacing increase. Be sure to check your clearances from hub face to frame, but my Dexter 95" axle has plenty of clearance from the 80" frame. eTrailer has been the best vendor, period! I originally needed these wheels in April 2016 to replace the truck wheels I had, but the 5-on-5" wheels were not a carried item. Within days the team added them to their product line and had them shipped.
These newer Vesper wheels are even better than the originals from 2016. Thanks eTrailer team for another great experience!


I love the look of these led lights at night.
a lot of positive comments also. Shipping time was awesome. Thanks George and Carol.


Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • Rubber Grommet for 2.5 Inch Running Light Which Fits a 2.75" Hole Cutout
    The Rubber Grommet # A56GB will fit the Red # MCL157RB or Amber # MCL157AB 2.5" lights and requires a 2.75" hole.
    view full answer...
  • Recommendation for Bright, 2-1/2 Inch, Round, Trailer Tail and Clearance LED Lights
    The Peterson Piranha LED 2-1/2 Inch Round Trailer Clearance Light, 3 Diode # 162R light that you referenced is certainly a bright trailer light. This 3 diode LED light will be brighter than a standard trailer light for you. I have attached a review video of the # 162R and the # 162A for you to see what the lights look like when they are on in the dark. The Peterson Piranha lights will install on the trailer using a 2-wire pigtail and grommet, # 162-18K. These LED light will work great...
    view full answer...
  • Is GloLight LED Trailer Clearance or Side Marker Light P2 Rated
    I checked with Optronics and can confirm that the GloLight LED Trailer Clearance or Side Marker Light # MCL157RB is P2 rated. To mount this light you can use the 2-1/2" Round Grommet # A55GB for flush mount or 2-1/2" Round Grommet # A57GB for a recessed mount. It will require 2-Prong Plug # A46PB. The GloLight LED Trailer Clearance or Side Marker Light # MCL157RB is red although there is also an amber version of the exact same light at part # MCL157AB. I have added links to video reviews...
    view full answer...
  • Is the Heavy Duty Light Bracket # BK55BB Compatible with Optroncs Glolights
    Yes, the Heavy-Duty Metal Mounting Bracket # BK55BB that you referenced would work with the Optronics Glolight Amber # MCL157AB or the Optronics Glolight Red # MCL157RB but you will need a grommet as well. For that you would want a Round Grommet # A57GB. For wiring up the lights you will want a Two Wire Pigtail for Sealed Trailer Clearance, Side Marker Lights # A46PB.
    view full answer...
  • Difficulty Installing Optronics Market Light MCL157AB and Grommet A55GB in Bracket BK55BB
    You are not alone! The lights # MCL157AB have to fit tight in the grommet # A55GB and the grommet in the bracket # BK55BB so there is very little tolerances. One thing that I have had success with is to put the light in the grommet and then push both into the bracket together. Another tip that usually does the trick is to use some soapy water on the outside of the grommet to help it slip into the bracket.
    view full answer...
  • Determining If GloLight LED Trailer Light MCL157AB Will Fit PJ Utility Trailer
    It is possible that the GloLight LED Trailer Clearance or Side Marker Light - Submersible - 9 Diodes - Round - Amber Lens # MCL157AB you were looking at will work on your PJ Utility Trailer, but to be sure you would need to have a 2-1/2" grommet like the # A55GB in the frame of your trailer. If you do not have one you can add the # A55GB but you will need to drill a 3" hole for it to fit in. The # MCL157AB does not include the 2 wire harness, so you would also need the # A46PB. I included...
    view full answer...
  • HIghest Quality Trailer Tail Lights & Marker Lights With Grommet
    If you want the highest quality and most eye-catching trailer tail lights, then I highly recommend Optronics LED lights with a plethora of diodes. Let's go ahead and start with the tail lights with stop, tail, and turn functionality. The best lights, as well as the needed grommet and wiring pigtail is the following: - Optronics LED Trailer Tail Light - Stop, Tail, Turn - Submersible - 48 Diodes # STL70RB - PVC Grommet # A70GB - 3-Wire Pigtail # A45PB This is a 6-1/2" long x 2-1/4" tall...
    view full answer...
  • Recommendation of Turn Signal and Parking Light for Off-road use
    I recommend the amber trailer turn signal and parking light # ST70AB as it's sealed and waterproof. The rubber grommet # a70gb will provide shock mount protection extending the life of the lamp. The Optronics # MCL157AB could possibly be used as a turn signal but not recommended. The grommet you referred # A56GB would work as it will provide shock protection especially that you will be off-road. It will seat properly once the light is plugged into the grommet. The LED equivalent is amber...
    view full answer...

Do you have a question about this Trailer Light?

Info for this part was:

Employee Tricia G
Written by:
Tricia G
Employee Kathleen M
Installed by:
Kathleen M
Employee Chris R
Video Edited:
Chris R
Employee Brian T
Updated by:
Brian T

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