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

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

Part Number: MCL157AB
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$15.73
Retail:$42.39
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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 etrailer.com or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - MCL157AB

Highlights

  • Reliable In Any Weather: Sonically sealed, waterproof housing keeps water out, even when submerged.
  • Fewer Replacements Needed: 9-diode LEDs use less power and last 50× longer than incandescent bulbs.
  • Solid, Modern Glow: GloLight lens forms a smooth, even amber light that stands out on the road.
  • Simple Power Connection: Uses a standard 2-prong plug for quick hookup.
  • One Light, Two Uses: Works as a clearance or side marker light when properly mounted.
  • Road Legal: P2 rated and meets DOT, FMVSS 108, and CMVSS lighting standards.

Features to know about

Brighter, Smoother Light for Better Visibility: 9-Diode GloLight Design

This 2-1/2" round amber LED light stands out with its GloLight lens that creates a solid, even panel of light instead of individual bright spots. The 9 diodes deliver consistent brightness and a clean glow that’s easy on the eyes but hard to miss. It’s DOT compliant and meets FMVSS 108 and CMVSS standards, giving you dependable performance anywhere you need a clearance or side marker light. At 12.8 volts it draws only 0.099 amps, so it’s efficient while staying bright.

Optronics GloLight amber LED trailer clearance or side marker light illuminated, showing smooth solid glow pattern across round lens.

No More Bulb Changes or Burnouts: Long-Lasting LED Build

Forget the days of replacing fragile incandescent bulbs. The LEDs in this light last up to 50 times longer and handle shock and vibration without failing. They run cooler, use less power, and have no filaments to break. Once installed, you can count on steady illumination with no bulb maintenance required.

Stays Dry and Reliable: Fully Submersible Waterproof Housing

If your trailer sees rain, mud, or even full submersion, this light is built to handle it. The housing and lens are sonically sealed into a single waterproof unit that keeps out moisture completely. That means no corrosion or shorting when launching at the ramp or rolling through wet conditions—just reliable performance trip after trip.

Built Tough Inside and Out: SMT Circuit Board Construction

The LED circuit board uses surface-mount technology (SMT) for better durability and heat control. Each diode is soldered directly to the board, so it resists damage from vibration and rough use better than older styles. This setup gives the light a thinner profile while ensuring solid electrical contact for long-term reliability.

Clean Install in Tight Spaces: Recessed Mount with Standard Plug

Installation is straightforward thanks to the recessed-mount design that fits into a grommet (A55GB, A56GB, or A57GB sold separately). It connects easily using an industry-standard 2-prong plug (A46PB sold separately). Once in place, the low-profile housing sits flush for a clean look and protected fit that won’t snag on anything.

Recessed-mount LED trailer light installed in a grommet, showing flush fit on trailer surface.

Back view of Optronics GloLight LED trailer light showing standard 2-prong plug connector for easy installation.

Specs

Quantity

  • Quantity: 1 clearance/marker light

Lighting

  • Diodes: 9

Dimensions

  • Overall dimensions: 2-1/2" diameter x 1-3/16" deep

Diagram showing dimensions of Optronics MCL157AB GloLight round amber LED trailer clearance and side marker light, 2-1/2 inch diameter and 1-3/16 inch depth.

Electrical

  • Power draw at 12.8 volts: 0.099 amps

Warranty

  • Lifetime warranty on LEDs

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





Customer Satisfaction Score:

Ratings & Reviews

4.9

122 reviews
Review sort icon
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.

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Thanks James got it right on time



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Good quality.



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Looking good still after a year



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Light is bright and looks great .



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Excellent

Marty profile picture

Marty

8/11/2022

Excellent ... no issues



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



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Excellent hi vis lighting for my traile r.



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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 etrailer.com



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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.



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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



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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.



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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!


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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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...


Info for this part was:

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

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