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

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

Part Number: MCL157RB
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$14.36
Retail:$31.98
You Save: 55%
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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). 2-Wire pigtail. P2 rated. Great Prices for the best trailer lights from Optronics. GloLight LED Trailer Clearance or Side Marker Light - Submersible - 9 Diodes - Round - Red Lens part number MCL157RB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (122)
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Optronics Trailer Lights - MCL157RB

Highlights

  • Reliable In Any Weather: Sonically sealed, waterproof housing and lens keep water out so the light stays on.
  • Fewer Replacements Needed: 9-diode LEDs last up to 50 times longer and draw only 0.099 A at 12.8 V.
  • One Light, Two Functions: Works as a clearance or side marker light for flexible trailer use.
  • Distinctive Solid Glow: GloLight lens gives a smooth, even red light pattern for a clean modern look.
  • Built for Rough Roads: SMT construction resists shock and vibration for dependable performance.
  • Road Legal: P2 rated and meets DOT, FMVSS 108, and CMVSS standards for compliance.

Features to know about

Brighter and More Distinctive Lighting: GloLight LED Design

If you want your trailer lights to stand out, the GloLight lens gives off a smooth, solid panel of red light instead of the usual dots of LEDs. With 9 LEDs behind a 2-1/2" diameter red lens, it delivers bright, even illumination that’s easy to see and completely street legal. P2 rated for a 90-degree beam pattern, it meets DOT, FMVSS 108, and CMVSS standards for clearance or side marker use. It draws only 0.099 amps at 12.8 volts and adds a clean modern look while staying energy-efficient.

Dealing with Water and Moisture: Fully Sealed and Submersible

When you tow through rain or launch a trailer into the water, this light stays dry inside. The housing and lens are sonically sealed into a single waterproof unit so moisture can’t get in to damage the LEDs or circuit board. The polycarbonate lens and shell hold up well in rough, wet environments, making this light ideal for trailers that see heavy use.

Shock, Vibration, and Heat Resistance: Durable SMT Construction

Road vibration can kill ordinary bulbs over time, but this light uses surface-mount technology (SMT) on its LED board. Each diode is soldered directly to the board for better shock resistance and improved heat distribution. That means the light will keep working reliably even after miles of bouncing down rough roads.

Quick Mounting Without Hassle: Recessed Installation Made Simple

At 2-1/2" in diameter and 1-3/16" deep, this round light mounts neatly into a recessed grommet for a clean, low-profile fit. It accepts industry-standard 2-prong plugs like part # A46PB (sold separately), so wiring is straightforward with just two connections. Use grommets such as # A55GB or # A57GB (sold separately) depending on your preferred mounting style.

Back view of Optronics MCL157RB GloLight LED trailer clearance and side marker light showing standard 2-prong plug connector for wiring installation.

Recessed mount trailer light installed in grommet housing showing how Optronics MCL157RB fits flush into trailer surface.

No More Bulb Swaps or Burnouts: Long-Lasting LED Reliability

This Optronics LED setup lasts up to 50 times longer than incandescent bulbs and uses far less power. With no filaments to break and no bulbs to replace, it’s a simple “install it once” solution that keeps shining bright for years of dependable service.

Specs

Quantity

  • Quantity: 1 clearance/marker light

Lighting

  • Diodes: 9

Dimensions

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

Technical diagram of Optronics MCL157RB GloLight round red LED trailer clearance and side marker light showing 2-1/2 inch diameter and 1-3/16 inch depth dimensions.

Electrical

  • Power draw at 12.8 volts: 0.099 amps

Warranty

  • Lifetime warranty on LEDs

MCL157RB Optronics GloLight LED Trailer Clearance or Side Marker Light - Submersible - 9 Diodes - Round - Red 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). 2-Wire pigtail. P2 rated.

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Great service.



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Great value for price



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Worked great so far but I can't vouch for it's longevity yet, it is bright though.



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Product was purchased online. Product arrived in a timely manner and in good condition.



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Light looks great at night.



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Sets my trailer apart from everybody else's



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These have a clean look and come with what appear to be stainless screws and a gasket.



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Lit my flatbed up, looks great functions as promised



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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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Great lights.



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Great upgrade, good company to do business with.



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So far, so good! All fit properly and working well. Thank you.



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Delivery was quick and installation took less than 3 minutes, mostly making sure the plug was secure in the lamp.


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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...
  • Looking for Trailer Clearance Light to Fit 2-5/8 Inch Rough Opening
    I'd recommend the # MCL59RB for red or # MCL59AB for amber. The lamps are sealed and are waterproof, perfect for a snowmobile trailer. Each LED lamp is 2-1/2 inches in diameter. With the lamp, you'd use the # A57GB grommet, which requires a 2-25/32 inch hole, which is about .156 of an inch larger than the 2-5/8 inch hole you referenced. If your 2-5/8 inch measurement is right on the mark, it would take just a few moments with a Dremel or a round file to slightly enlarge the existing holes...
    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...
  • Availability of Oval and Round LED Lights Which Fit in Rubber Grommets
    There are both oval and round LED lights which may work for you but we do not have the dimensions of rubber grommets for specific trailer manufacturers. For an oval LED light with a grommet, the GloLight # STL111RB is 6-7/16" Wide x 2-5/16" tall and fits in grommet # A70GB. A round LED light that may work is the GloLight # MCL157RB which is 2-1/2" Diameter x 1-3/16" deep and fits in grommet # A55GB. I've added links to video reviews of each of these parts, as well as links to our pages...
    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...
  • Availability of a Flush Mounted 2-1/2 inch Diameter GLO Light Led Trailer Light
    The Optronics GloLight # MCL157RB that you referenced is designed to be recess mounted with the Recess Flange # A57GB. While it wouldn't quite be as flush mounted as the Optronics GLOLight LED Stop/Turn/Tail Light # STL101RFMB that you also have it would look pretty good on your trailer. For a very similar 2-1/2 inch LED light that is designed to be flush mounted check out the # MC57RB. For a flush mounted grommet you would want part # A55GB.
    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...
  • Recommended Clearance Light And Grommet For Older Snowmobile Trailer Rebuild
    The clearance light I recommend for your snowmobile trailer is part # MCL57RB. This is a 3 diode 2-1/2 inch round light. It does require a rubber grommet for installation. The grommet to use for installing this light I recommend is part # A57GB. You may need to take a small round file and open the mounting hole you said measured about 2-5/8 inches but this should work well for your trailer. To connect the light to your trailer wiring I recommend using the Two Wire Pigtail, part # A46PB....
    view full answer...

Do you have a question about this Trailer Light?


Info for this part was:

Employee Leah B
Updated by:
Leah B
Employee Brian T
Updated by:
Brian T
Employee Hannah L
Updated by:
Hannah L
Employee Tricia G
Written by:
Tricia G
Employee Jameson C
Expert Research:
Jameson C
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Cole B
Installed by:
Cole B

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