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Optronics Mini LED Trailer License Plate Light w/ Chrome Housing - 2 Diodes - Rectangle - Clear Lens

Optronics Mini LED Trailer License Plate Light w/ Chrome Housing - 2 Diodes - Rectangle - Clear Lens

Item # LPL31CB
Our Price: $13.29
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2-3/4" x 1-3/8" Rectangle. Low-profile LED trailer light with chrome-plated polycarbonate housing illuminates your license plate. Surface mount with foam gasket - hardware included. 2-Wire design. Great Prices for the best trailer lights from Optronics. Optronics Mini LED Trailer License Plate Light w/ Chrome Housing - 2 Diodes - Rectangle - Clear Lens part number LPL31CB can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (250)
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Optronics Trailer Lights - LPL31CB

  • License Plate Lights
  • Rectangle
  • LED Light
  • White
  • 2-3/4L x 1-3/8W Inch
  • Surface Mount
  • Non-Submersible Lights
  • Optronics

2-3/4" x 1-3/8" Rectangle. Low-profile LED trailer light with chrome-plated polycarbonate housing illuminates your license plate. Surface mount with foam gasket - hardware included. 2-Wire design.


  • Compact LED light illuminates your trailer's license plate
  • 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
  • Snap-on chrome-plated polycarbonate housing
  • Clear lens over white LEDs
  • Surface mount with foam gasket - hardware included
  • 2-Wire design includes power lead and ground wire
  • DOT approved when properly mounted
    • Requires single light mounted at trailer center, or 2 lights mounted on each side


  • Quantity: 1 license plate light
  • Overall dimensions: 2-3/4" long x 1-3/8" wide x 1" deep
  • Distance between mounting holes (center on center): 2"
  • Diodes: 2
  • Power draw at 12.8V: 0.027 amps
  • Lifetime warranty on LEDs

Manufacturer Cross Reference
Light will work as an exact replacement for:
Uni Bond # DL2020
Grote # 61501
Peterson # M434

Optronics LPL31 Series Mini LED Trailer License Plate Light with Chrome Housing Dimensional Diagram

LP31CB Optronics Mini LED Trailer License Plate Light w/ Chrome Housing - 2 LEDs - Rectangle - Clear Lens

Alternate part number: LP-31CB

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Optronics Mini LED Trailer License Plate Light w/ Chrome Housing - 2 Diodes - Rectangle - Clear Lens - LPL31CB

Average Customer Rating:  4.7 out of 5 stars   (250 Customer Reviews)

2-3/4" x 1-3/8" Rectangle. Low-profile LED trailer light with chrome-plated polycarbonate housing illuminates your license plate. Surface mount with foam gasket - hardware included. 2-Wire design.


A couple of years ago, I converted a single jet-ski trailer to a kayak trailer to hold my two kayaks, and installed new LED stop/turn/brake lights and clearance lights from The lights worked great, and I used the trailer for a couple of years before I realized that I was missing a light for the license plate! I'm surprised I never got pulled over by the police! came to my rescue again with this great LPL31CB license plate light. It's very bright and really lights up the plate and the ground around the back of my trailer. Recently I added three more small red clearance lights at the back of my trailer, so the tailgaters and crazy drivers have no excuse about seeing my trailer! See the pictures! has great products, great service, and fast shipping!


Very strong led light. And very multi purpose. Built a toy hauling trailer for a friend that need some extra light for loading up after dark, and liked to be able to keep a eye on his load after dark. These worked out great, also used some to light up some quads. Very bright for as small as they are. Oh and there are 26 lights on the trailer. Lol no problems with any of them.


So far these led flush mount lights are working great. They're bright and a refreshing update over old incondesant lights. I got these to put on an older camper I purshased. From the photos you can see what was on the camper and I what I upgraded to. The old lights were dull and could barely tell they were lit. These lights bring a modern day update to an 1989 camper. Besides the product being good the shipping was fast and free. And I also like that on etrailers site when your package is in shipment they have a map of the US showing where your package is.


I used these as exterior door lights (porch light) for my tear drop trailer build. They are perfect for this application. Not too bright, which is a good thing, whether you use them as I did or for their intended use. Top quality. Bright chrome finish.



Still working great as porch lights for my tear trailer. No corrosion or failures at all.


Has worked good


Fair price fast shipping


Fair price quick ship


LPL31CB as used in the flameless heat generators we build for Rain for Rent (used in the natural gas industry). Looks good, works fine, lasts a long time!


I bought a Road Armor rear bumper for my 4x4 pickup and they recommended and these license plate lights to match up with their bumpers. They are LED so they are brighter than the stock lights. They were easy to install because either wire can be the ground wire and they look great mounted on my heavy duty bumper. Thank you for having what I needed and getting my order out quickly.

Scott G.


The lights are working great ! No problems at all.


Great quality


I had reposition the license plate on my trailer when doing trailer modifications. I mounted the plate and light on the fender and the light worked as expected. E-Trailer has the right stuff at the right price at the right delivery time. Thanks



I am completely satisfied with them. They are of good quality and have held up the sun light and other elements. Thanks for the follow up.


Quality replacement light.


Very fast delivery


There are 2 wires for this light, both are black, neither are labeled. No way to tell which is power and which is ground. I blew through 5 fuses in my truck and an hour of troubleshooting before realizing I had the wires on this particular light switched.

After that, the light works fine.

Etrailer Expert

Laura E.


Thanks for your review and your business, Brian. We recommend testing the wires on your truck to confirm their function before making connections. Use a tester like 3808 to confirm what function is carried on each vehicle wire.


Should work fine, was what I was looking for to replace an older light.


Only 3 LED lights. Not very bright, but it's just for a trailer license plate. Comes with what appears to be 2 wood screws. I had to buy 2 stainless steel machine screws and stainless lock nuts to attach to the license plate holder. I also had to drill a hole in the holder because the housing didn't have recessed built into the back of the mount (so wires would have been pinched when light tightened. Nice light, manufacturer needs to modify back so wires have a place to exit on a flat surface, and they need to provide machine screws/nuts. a normal 5 minute install (2 bolts and 2 wires) took an hour due to having to run to the hardware store and drilling a hole in the license plate holder. Would still buy again


The light is working great. Since it has a very low amp draw, I wired it to my steps on the trailer and installed down by the steps a waterproof switch. It works great as a night light and to see after dark when going up the stairs. We already had outside led lights, but they are much brighter than needed.


Yes, the light is working good. I mounted it just above and on the right side of our entry stairs on our travel trailer and put an off/on switch near by. The regular outside light is an LED and rather bright. This uses very little electricity and is just enough light for the stairs and for a night light when returning after dark.


We needed something that could light the interior of the concession trailer while the generator was not running. So we installed this light inside to run off the trailer lights hook up. Provides plenty of light for clean up. Perfect fit for my application. Easy install.


As advertised, quality tag light, great price. Just what I needed to relocate tag from fender to higher location on the rear gate.

Richard W.




Simple license plate light, good price, and easy install.



Everything is working well and I continue to be happy with the lights and locks. Thanks for checking in.


Product was what I had ordered. It will be used on my ATV Trailer License Plate. We had to move the License Plate from the Manufactures Location to a higher position on the tailgate because the original location was low and the License Plate bolts kept coming out and the License Plate was getting bent all the time. Looks like a good product from what I can tell.
The only issue I have is with the shipping which took over (10) days which was a long time for anything....


A year later this light still works perfectly. This was the last light on my trailer to change over to led. The leds always work and etrailer sells high quality products and is my go to place for all trailer needs!


really works well for Me. Restored an old Gator tilt bed trailer, added a flat bed and tie downs, This light is wonderful and super easy to install.


Trailer marker lights were great quality & look good. Installation was quick and easy. They have endured a lot of rough terrain bouncing with no problems. Ordering & delivery was quick easy.

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • Dimensions and Recommended Mounting Hardware for the LED Mini Trailer License Plate Light
    The LED Mini Trailer License Plate Light # LPL31CB comes with installation screws, but if needed you could install it with other hardware. You might find that a self-tapping screw would work better if you plan on installing this to a metal surface. The distance on center between the mounting holes is 2 inches. The diameter of the holes is 3/16 of an inch. And the thickness at the mounting holes is an 1/8 of an inch.
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  • Steel Frame License Plate Bracket Availability that is Compatible with LED License Plate Light
    If you dont mind drilling a few holes you could get the LED Mini Trailer License Plate Light # LPL31CB to work with a Steel Trailer License Plate Mount Bracket # LP20SB. But I pulled both these products from our warehouse and the holes of these products do not line up, but if you used the # LPL31CB as a template you could drill the correct dimension holes in the # LP20SB above its current holes. Or you could check out the Optronics Heavy Duty License Plate Bracket # LP15SB. This has a...
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  • Is LED Mini Trailer License Plate Light DOT Compliant?
    According to Optronics, you will need a pair of LED Mini Trailer License Plate Lights # LPL31CB, mounted on each side, in order for it to be DOT compliant.
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  • What Size are the Mounting Holes for LED Mini Trailer License Plate Light # LPL31CB
    I went out to the warehouse and pulled LED Mini Trailer License Plate Light # LPL31CB to take some measurements for you. This light does include some screws to mount it. The screw holes are approximately 3/16 inches in diameter. I made a video for you showing the dimensions for you. The wires coming out of the back are coming out of a couple of round nubs. The overall dimensions of the nubs (the hole size to cut if needed) would need to be 1/2 inch across by 1/4 inch tall.
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  • Availability of a License Plate Light that is Made in the U.S.A.
    I went out to the warehouse and pulled Peterson license plate light # M439K. The packaging does indicate that it is made in the USA. I have included a link to a video review of the light for you.
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  • Taillight Recommendation for F008585-2 Fulton Trailer Fender
    We don't offer a taillight specifically designed for use with the # F008585-2 fenders you'd looked at, but I've seen folks use taillights like the # STL78RB mounted to the rear of the fender step as shown in the provided photo. You'd then need to devise a way of mounting and illuminating the license plate if you were to go that route. You could bend a slight radius on the license plate and actually mount it vertically to the rear face of the fender as shown in the provided photo. You'd...
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    Image 1 for
  • Recommended Tail Lights And LED License Plat Light
    The Bargman LED Triple Trailer Tail Light - 4 Function - 36 Diodes - Black Base - Red, Amber, and Clear Lens Item # 47-84-005 is a recessed light and doesn't have a license plate light. There is nothing with this style or size that does. I recommend using a separate light like the LED Mini Trailer License Plate Light, 2 Diode - Chrome Plated # LPL31CB for this. You can also use a frame and LED combination like the LED Trailer License-Plate Light w/ Mounting Bracket, 2 Wire, 5 Diode -...
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  • License Plate Recommendation for a Small Trailer Towed by Motorcycle
    Most likely yes, but you would have to check with your local DOT to confirm that. An easy light to use would be the part # LPL31CB. This would tie into the running light circuit of the trailer's lights and would light up the license plate.
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  • Is the Bargman Surface Mount LED Double Tail Light Available with an Integrated License Plate Light
    At this time there is not a version of the Bargman LED, Surface Mount, Double Tail Light, # 47-84-610, that incorporates a license plate light at the bottom of the housing. We do have a solution for you though. You could install the Bargman lights that you like and then install an LED license plate light like the LED Heavy Duty Trailer License Plate Light, # LPL41CB, or the LED Mini Trailer License Plate Light, # LPL31CB, above your license plate. If you need a bracket to attach the license...
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  • Availability of LED License Plate Lights
    We do have some LED license plate lights. You could use # LPL31CB or # LPL41CB. I have included some links to video reviews for each of these lights for you.
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  • Installing Optronics LED License Plate Light # LPL31CB
    Trailers are usually wired so that the brown wire carries the running light circuit. The wire color on the wiring system of a vehicle can vary. You can easily find the correct circuit by turning the vehicle running lamps on and then using a circuit tester like part # PTW2993 to test the wires feeding the taillight assembly until you find the wire that shows current. The # LPL31CB lamp has two wire leads, one would tap into the running light circuit, the other would tap into an existing...
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  • Recommended Metal License Plate Bracket with Light
    For a metal license plate bracket with light, we have the Peterson License Plate Light with Bracket # PM436B. We have other options with lights but they are a polymer. You can always get the parts separately like bracket # LP20SB, # CE26053A or # LP15SB and then add the light # LPL31CB. I've attached a link to your light options.
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  • Instructions for Wiring Additional License Plate Light With Submersible Trailer Light Kit # TL5RK
    When it comes to adding an additional license plate light to the Submersible, Under 80" Trailer Light Kit with 25' Wiring Harness, # TL5RK, I recommend taking a look at the LED Mini Trailer License Plate Light, # LPL31CB. The light has a weathertight seal to protect it against the elements and the two-wire design includes the lead and ground wires to mount to any surface. In order to wire this light, one of the wires will need to connected/spliced into the running light circuit (brown...
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  • Can Optronics LED Mini License Plate Light # LPL31CB Mount Upside Down Without Water Leakage
    The light you referenced, Optronics LED Mini License Plate Light # LPL31CB, is intended to mount so that its chrome-finish cover is on top. Although it does have a weathertight seal against the elements, this is intended to provide protection from water damage in the usual mounting position. I recommend one of the lights shown on the linked page since these products are all submersible. None of these happens to be an LED-type however. Optronics # LP91CB can be used along with their bracket...
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  • How Many Trailer License Plate Lights are Required On a Trailer
    You should only need one license plate light like the part # LPL31CB to be legal as long as it properly illuminates your license plate. I attached a couple review videos for this light plus a help article on trailer lighting requirements for you to check out as well.
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  • Replacement License Plate Light For 2009 Haulmark 7x12 Low Hauler Trailer
    I did some research on your 2009 Haulmark Low Hauler trailer. I was able to see several different styles of license plate lights and holders on trailers. I have attached a link to our product page for license plate lights. Some have the license plate holder attached to the assembly and some are just the lights that are mounted to light the license plate. There are different opinions about mixing LED and incandescent lights on the same circuit. We have had customers that wire them in the...
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  • Do Tail Lights on GearDeck 17 Enclosed Cargo Carrier # H00604 have a License Plate Light
    I went out to our demo area and personally checked the lights on the GearDeck 17 Enclosed Cargo Carrier # H00604. While there isn't a specific white light that shines down on the license plate the red lights for the other functions do illuminate that area slightly so the license plate would not be complete in the dark at night. For greater visibility you could splice in an LED license plate light, # LPL31CB, and be in compliance for sure.
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  • LED License Plate Light for a 2007 Triton Elite 101x20 Trailer
    We only have 3 clear lens, white light LED lights for license plates. First is # LPL31CB. I have included a link to a video review of it for you. We also have # LPL41CB which will be brighter because it has 5 diodes. And then there is LED light with bracket, # LPL55CB.
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  • Replacement Trailer License Light Recommendation
    We have several license plate lights available (see link), but I would say the closest one we offer to the one in your picture would be the # LPL31CB.
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    Image 1 for
  • Finding Wire for Adding License Plate Light on Motorcycle
    Finding a running light wire on trailer wiring for adding a license plate light typically is a matter or tapping into the running light circuit on trailer wiring. While we do have install videos on trailers we don't typically do them on motorcycles for trailer wiring as that's not what these were designed for. And we don't get a lot of requests here to install trailer lighting on motorcycles. The best solution I can recommend would be to trace the wiring that runs to the running light...
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  • Is the Optronis License Plate Light Bracket Flat
    The Optronics License Plate Light Bracket # BK31BB is a flat bracket. This bracket is designed to work with either the Optronices Mini Trailer License Plate Light # LP31CB or the LED version # LPL31CB
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  • Recommendations for a Vehicle with all Blinkers Converted to LEDs
    There are work arounds that allow you to install LEDs in the place of blinker bulbs. For example you can install a load resistor like our LED Light Bulb Load-Resistor Kit # DI34ZR on each light assembly that will blink with the turn signals. However, since you plan on replacing all your blinkers with LEDs I thing you would be better off going to an electronic flasher relay to replace the thermal one in your vehicle. Currently none of the LED lights we offer have pre-installed load resistors. This...
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  • Could LED Mini Utility Light be Used as License Plate Light
    You said your license plate mount bracket is recessed so as long as the light part # UCL13C2PG can be mounted pointing down towards the plate it would work well for you. If you were to mount it on the same vertical wall as where the license plate is the light would be directed towards the back of the trailer and would not work well. If you need something to mount directly over the plate you would need the part # LPL31CB.
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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T
Employee Cole B
Installed by:
Cole B
Employee Chad S
Video Edited:
Chad S

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