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GloLight LED Trailer Utility Tail Light - Tail, Backup - Submersible - 22 Diodes - Oval - Clear Lens

GloLight LED Trailer Utility Tail Light - Tail, Backup - Submersible - 22 Diodes - Oval - Clear Lens

Item # UCL178RFP2B
Our Price: $23.25
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Work Lights
Shipping Weight: 0.44 lbs
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7-1/2" x 3-5/16". Waterproof, 2-function trailer tail light acts as tail and reverse light. GloLight lens creates a solid panel of light. Surface mount with built-in flange. Accepts industry-standard 3-prong plug. Great Prices for the best work lights from Optronics. GloLight LED Trailer Utility Tail Light - Tail, Backup - Submersible - 22 Diodes - Oval - Clear Lens part number UCL178RFP2B can be ordered online at or call 1-800-940-8924 for expert service.
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Optronics Work Lights - UCL178RFP2B

  • LED Light
  • Exterior Lights
  • Surface Mount
  • Oval
  • Utility Lights
  • White
  • Optronics

7-1/2" x 3-5/16". Waterproof, 2-function trailer tail light acts as tail and reverse light. GloLight lens creates a solid panel of light. Surface mount with built-in flange. Accepts industry-standard 3-prong plug.


  • Oval trailer tail light serves 2 functions
    • Tail light
    • Reverse light
  • GloLight lens creates a solid circle of light 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 and vibration
    • Allows for improved heat distribution
  • 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
  • Clear lens over white and red LEDs
  • Polycarbonate housing and acrylic lens
  • Mounts on surface of trailer with built-in flange - hardware not included
  • Accepts industry-standard 3-prong plug (sold separately)


  • Quantity: 1 utility light
  • Dimensions: 7-1/2" wide x 3-5/16" tall x 1-1/8" deep
  • Diodes: 22
  • Power draw at 12.8 volts: 0.50 amps
  • Lifetime warranty on LEDs

Optronics UCL178 Series GloLight LED Utility Light Diagram

Innovative GloLight Design

This white LED light serves as an exterior light for your trailer, RV, or other application. The light gives your RV 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 RV 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 trailer lighting. LED lights are more efficient, use less power, and last much longer than incandescent lights.

PL-3 Wiring Connection

Optronics PL-3 Connection

This light has an industry-standard PL-3 connection as pictured above. The light accepts a 3-prong plug (sold separately).

Surface-Mount Light

Surface-mount lights install flat against the surface of the trailer, so a hole does not need to be cut into the trailer for the light. This type of light is installed using a flange or bracket that has mounting holes. And mounting hardware is used to secure the light to the trailer.

UCL178RFP2B Optronics GloLight LED Utility Tail Light - Surface Mount - Submersible - 22 Diodes - Oval - Clear Lens

California residents: click here

Video of GloLight LED Trailer Utility Tail Light - Tail, Backup - Submersible - 22 Diodes - Oval - Clear Lens

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Optronics Trailer Lights - Utility Lights - UCL178RFP2B Review

Speaker 1: Today we're taking a look at the Optronics Glow Light taillight and reverse light. This waterproof light provides a red taillight, and white reverse light for your trailer. Has the glow light lens that creates a solid circle of light, with a nice smooth appearance. So the outer band glows red, and the inner area is white when you activate the reverse function of the vehicle and trailer.It's a sonically sealed, waterproof housing and lens unit that is submersible. Features durable surface mount technology. When it comes to the construction of the LED circuit board, that better withstands shock and vibration, and allows for improved heat distribution.

Now LEDs make great replacements for incandescent lights. They last longer, they burn brighter, and they're more efficient. With LEDs, you don't have to worry about replacing bulbs, and you don't have to worry about brittle filaments.We're looking a polycarbonate housing and acrylic lens. It's a surface mount installation, with the built in mounting flange. Mounting hardware not included.

And then here on the back, it accepts an industry standard three prong plug, which is sold separately. Taking a look at the overall dimensions real quick, then we'll hook it up to power, so you can see what it looks like with power running to it. Edge to edge going this direction, is about 7-1/2 inches. Edge to edge this direction is about 3-5/16. And then the overall depth, that's back to front, is about 1-1/8 inches deep.The mount holes are separated on center going this direction, by about 2-3/4 inches.

And then going this direction, they're separated on center by about seven inches, maybe 6-15/16 inches, right in that area. Alright we're going to go ahead and hook it up to power, that we can see what it looks like. So you can see here, it sends out a really nice, clear, consistent signal. This is that outer band that's red in color. And then when we activate the reverse function of the trailer, that center area will glow white.That contains a total of 22 diodes, or LEDs, so the multi diode design really helps optimize the overall light output.

Power draw at 12.8 volts, is 0.50 amps. And Optronics puts a lifetime warranty on the LEDs. That's going to do it for today's look at the Glow Light taillight and reverse light from Optronics.

Customer Satisfaction Score:

Customer Reviews

GloLight LED Trailer Utility Tail Light - Tail, Backup - Submersible - 22 Diodes - Oval - Clear Lens - UCL178RFP2B

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

7-1/2" x 3-5/16". Waterproof, 2-function trailer tail light acts as tail and reverse light. GloLight lens creates a solid panel of light. Surface mount with built-in flange. Accepts industry-standard 3-prong plug.


I really like the bright back up lights. It does take a little extra work for the back up lights. - Sorry this pic doesn't show the backup/stop lights but this is the great little chuckwagon we put them on.


The lights are good and standard size, but they seem to have a slightly off plug receptical. I ordered 6 of them and all seemed to be the same. I had to bend my connectors with a pliers a little bit to get them plugged in.


Being used to put back up lights on trailer. Never had back up lights before. Very well made.


Still good








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.



Even though it was a small order, the replacement light worked perfectly!!! Great price and good quality product! Thanks


If you’re going to sell lights you should also sell the wiring harness along with it I almost couldn’t use the lights but got lucky and found the wiring harness.


Easy installation and nice and bright. I have purchased two more identical lights for a boat trailer clearance lights.


Upgrading our 1998 Coleman Grandview, the old incandescent just seemed too dim.
Nice light, only suggestion would be to list some wiring options, was a bit confusing going from the old Bargman to the new LED.
But I read through the Bargman page here and got squared away.

Pic is LED before anchoring compared to the stock on the right. BIG improvement.


This one is for the “driver” side. It has the lens on the bottom for lighting the license plate. (It does not include the license plate holder. I like this one because you just push in the wires. I recommend this light.


Fits very nice on 2008 Ranger Bass boat. It was not necessary, but I chose to trim a bit of the original hole to make it bigger for centering reasons. Looks like it was made with it when Item #a70gb is added.


Same as original for my skeeter boat trailer. Price was good and shipping was quick.


Everything delivered on time and complete. Heavy duty suspension kit is a must.
Took all of the guesswork out of building a trailer from scratch.


Bright and beautiful on vintage trailer.

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See what our Experts say about this Optronics Work Lights

Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Cole B
Installed by:
Cole B
Employee Daron K
Edited by:
Daron K
Employee Brian T
Written by:
Brian T
Employee Manda E
Updated by:
Manda E
Employee Carrie F
Updated by:
Carrie F

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