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Optronics LED Trailer Utility Light - Submersible - 10 Diodes - Oval - Clear Lens

Optronics LED Trailer Utility Light - Submersible - 10 Diodes - Oval - Clear Lens

Item # BUL72CB
Our Price: $22.96
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Shipping Weight: 0.27 lbs
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6-1/2" x 2-1/8" Oval. Waterproof, LED trailer utility light produces bright white light. Durable polycarbonate housing and lens. Recessed mount with grommet (sold separately). Accepts standard 2-prong or 3-prong plug. Great Prices for the best work lights from Optronics. Optronics LED Trailer Utility Light - Submersible - 10 Diodes - Oval - Clear Lens part number BUL72CB can be ordered online at or call 1-800-940-8924 for expert service.
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Optronics Work Lights - BUL72CB

  • LED Light
  • Exterior Lights
  • Interior Lights
  • Recessed Mount
  • Oval
  • Utility Lights
  • White
  • Optronics

6-1/2" x 2-1/8" Oval. Waterproof, LED trailer utility light produces bright white light. Durable polycarbonate housing and lens. Recessed mount with grommet (sold separately). Accepts standard 2-prong or 3-prong plug.


  • LED trailer utility light produces bright white light
    • Not certified for backup light function
  • Sonically sealed, waterproof housing and lens unit is submersible
  • LEDs make great replacements for incandescent lights
    • Last 50 times longer
    • More efficient - provide brigther light with less power output
    • No bulbs to replace - no brittle filaments
  • Durable polycarbonate housing and lens
  • Clear lens over white LEDs
  • Compatible with 12V DC systems
  • Recessed mount to trailer with grommet (A70GB - sold separately)
  • Accepts industry standard 2-prong plug (A45CB or A49PB - sold separately)
    • Also works with standard 3-prong plug - sold separately


  • Dimensions: 6-7/16" long x 2-5/16" tall x 1-3/4" thick
  • Diodes: 10
  • Power draw at 12.8V: 0.080 amps
  • Lifetime warranty on LEDs

Optronics BUL72 Series LED Utility Light Diagram

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.

BUL72CB Optronics LED Trailer Utility Light - Submersible - 10 Diodes - Oval - Clear Lens

Alternate part number: BUL-72CB

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Optronics LED Trailer Utility Light - Submersible - 10 Diodes - Oval - Clear Lens - BUL72CB

Average Customer Rating:  4.7 out of 5 stars   (121 Customer Reviews)

6-1/2" x 2-1/8" Oval. Waterproof, LED trailer utility light produces bright white light. Durable polycarbonate housing and lens. Recessed mount with grommet (sold separately). Accepts standard 2-prong or 3-prong plug.


I purchased $xx worth of led lights 6 marker lights and 2 ovals. The marker light had a protective wrapper and showed up pristine condition, however both ovals were thrown in the box with no protective wrapper the clear oval has a scratch but is still in good condition the red oval has scratches all over it to the point it looks used. Pretty Sad. Wish I could off included photos but it was hard to see the scratches In the picture my camera isn't the greatest.

Etrailer Expert

Katrina D.


I am sorry that they arrived in this condition. Let me get you over to our customer service department for them to get some replacements sent out to you.


Ol dumba$$ did not quite eliminate all the sources of failure of the original. I read ~ 12 VDC coming off the connector…assumed it had to be the original light failed on the after market bumper I bought. The new light you supplied showed up as per your published schedule. I plugged it in and it did not work? Still read ~12 VDC on the male connector to the light. Took the original assumed failed light and plugged it into the other side…worked just fine. Problem was a less than optimal connection at the factory tail light connection where I spliced in. Now I have a spare!


Fast shipping and part was as described!


Great product and fast delivery thanks again if I need anything else you will hear from me thanks again



Very good and great product couldnt be happier thanks again E trailer

Etrailer Expert

Mike L.


@Mark You're very welcome! We're glad to hear that the # BUL72CB trailer utility lamps are working well for you...


I installed these in my Motorhome as reverse lights.
I removed the clear yellowis 1156 lights


I have a 91 Dodge dually that had the old incandescent bulb marker lights and change them out to these LED lights the light is really bright looks good, good price, fast shipping & I attach the picture so you can see what the truck looks like


Great lights very bright perfect for reverse lights on my trailer rebuild


Never received it

Etrailer Expert

Katrina D.


You mentioned that this was never received as of 8/4. I see that this shows that it was delivered to your mailbox at 8/2. I always recommend to contact your neighbors to see if it was delivered to the wrong address. Can you please confirm if you have received this yet or not?


Products are ALWAYS as advertise. Etrailer
service is the best.


Replaced both reverse lights on my 2009 Mastercraft trailer. New lights are much brighter than factory and work well. Replaced both with grommet (item A70GB).



So far so good, they are working as expected and I may have to replace a few on the other side of the trailer with the same items.


I installed two of these lights in the rear bumper of my truck for reverse lights. They are not quite as bright as I was expecting but still pretty darn bright. I used these lights with part number A45CB pigtails and the rubber grommets (A70GB) for my install. Everything arrived on time and ready to use. Overall I am very pleased with these lights.


I purchased four of these lights for backup lights. Two for my ranch hand bumper and two for my headache rack. They throw a great amount of light for $20. I have plans to put them on a switch with a relay so they will work in reverse and on a switch. Good construction and great company to order from.


Products work great, service was prompt. Would do business again when I need tail lamps in the future. Pretty good selection, prices are excellent for the products listed. I upgraded my boat trailer lamps for better lighting and a newer look. Of which I got both. I am thinking that the clear utility light will be great backing up at the boat ramp when it is dark. The email follow up on status of the order was great too.


This product is the standard equipment on my 2014 Phoenix trailer. I somehow cracked the original unit and because of the crack, my original filled with water slowly and eventually was damaged. At first, I bought a replacement from another online retailer that had high ratings. When I asked my kids if the replacement worked, they looked confused. Confused because the replacement was not nearly as bright as the originals. Then I contacted my trailer customer service dept and found this was the part I needed. For backing into dark little Florida ramps just before daybreak, this is the light to have.


All was good on the order except on red running light didn’t work. One had hairline crack.


Great company to do business with. Ordered several light related products, marker lights , marker light bases, utility lights and LED replacement bulbs. Order was processed quickly and delivered sooner than promised. You should definitely keep them in your favorites list for trailer maintenance items!


These lights are being used as (non-DOT-compliant) reverse lights for a livestock trailer. I used these as opposed to the DOT-approved lights primarily because they are supposed to be brighter and they are nearly half the price. I am very happy with them and, although I hope there are no state troopers checking for a DOT stamp on the lights in the future, I would highly recommend. Please understand that these are not like flashlights, they are more like floodlights. They create a very wide light pattern that shoots all around. For the limited number of times I use my livestock trailer to haul cattle to the sale barn at night, I know these lights will be perfect.

You just can't beat etrailer for their customer service. I had these in my hands in less than 24 hours and I live in West Central Illinois. I have placed half a dozen orders from etrailer in the recent past and the service is unmatched.


Nice lights fast shipping excellent service.


Just installed it. Shows up nice and bright even with the evening sun shining directly on it.


Work great so far.... only had them in for a couple days.... they replaced old style clear lights with bulbs in my ranch hand bumper.... plugged right into existing wiring.... work great for hooking up trailers at night...


Lights came well packed, and complete. These lights produced a diffused light, which I wanted. I only tested one in the garage with a power supply, it worked well for me. I'm using them as load lights on a car transport.


Lights are nice and bright. Install was a breeze with matching plug.


Item delivered earlier than expected and works great. Lights are very bright, I'm happy with the purchase.



A year later. zero issues or problems. still very happy


This is really a bright light for the interior of our cargo trailer. I installed it right in the front V top to shine all the way to the ramp. It does a good job.


Lights look and work great. They replaced the old lights on my rear Ranch Hand bumper and made a huge difference. Seamless process with etrailer.

Show More Reviews

See what our Experts say about this Optronics Work Lights

  • Difference in Brightness Between # BUL10CB Backup Light and # BUL72CB Utility Light
    Both the # BUL10CB and the # BUL72CB are 10 diode lamps, and therefore neither lamp would really be brighter than the other. The main difference between the two is how the light is focused. Because the # BUL10CB lamp is DOT compliant as a back-up light, the light would be more diffused over a wider area. By contrast, the # BUL72CB which is NOT certified as a back up light would have the light more focused on a smaller area. Each lamp would output a similar amount of light, but the # BUL72CB...
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  • Color Temperature for Sealed, 6-1/2" LED Clear Oval Trailer Utility Light, 10 Diode # BUL72CB
    We don't have a Kelvin rating for the Sealed, 6-1/2" LED Clear Oval Trailer Utility Light, 10 Diode # BUL72CB but it's very white. If you check out the attached picture you can see just how bright it is.
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    Image 1 for
  • Is Optronics Back Up Light # BUL72CB Sealed
    The Optronics Back Up Light # BUL72CB that you referenced is a sealed waterproof type light that would work well for you.
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  • Dimension Where the Wiring Harness Port is on Utility Light part # BUL72CB
    I went and pulled a part # BUL72CB from our warehouse to get the measurement you requested and found that the wiring harness port starts at 1 inch from the end of the light closest to it and is 1/2 inch wide. I attached a picture to help explain.
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  • What is the Brightness Output of the Optronics 6-1/2 Inch LED Trailer Lights
    Optronics uses candelas to rate the brightness of their lights instead of lumens and the output of the Optronics 6-1/2 inch Oval LED Back Up light, # BUL52CB, is 175 candela. At a distance of 1 foot, the candela output is equal to the output in lumens. This light has the highest candela output of any of our 6-1/2 inch oval LED lights. The LED 10 diode light, # BUL72CB, has an output of 123 candela and the LED 10 super diode light, # BUL78CB, has an output of 125 candela. Another thing...
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  • What Is the Brightest 6-1/2" Oval Backup/Utility Light
    If we are strictly speaking candela then the brightest oval 6-1/2" utility light we offer is the Optronics LED Trailer Utility Light part # BUL72CB which is rated at 123. If you can use a backup light then we offer the Optronics LED Backup Light part # BUL52CB which is rated at 175 candela.
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  • How Many Amps Does The Optronics LED Clear Oval Trailer Utility Light # BUL72CB Draw
    The Optronics catalog states that the LED Clear Oval Trailer Utility Light # BUL72CB, draws 0.08 amps at 12.8 volts. I also used a multimeter to test the amp draw of the LED Clear Oval Trailer Utility Light # BUL72CB. The light measured a draw of 0.07 amps at 12 volts.
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  • Recommendation to Replace Optronics BUL-74CBK Oval Trailer Tail Light
    I do have an option for you, however we do not have the exact Optronics BUL-74CBK model tail light that you referenced available. The closest assembly we have is with the Optronics # BUL28CLPB that features a hardwired 3-prong plug, a 10 diode design, and a sonically sealed waterproof housing. The assembly measures 7-9/16 inches long, 3-5/16 inches tall, and 9/16 inch deep. The distance between the two mounting holes on center is exactly 7 inches. You can compare this to your existing...
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  • Can Sealed, 6-1/2" LED Clear Oval Trailer Utility Light be Used with Wall Switch
    The light part # BUL72CB does use a three prong connector but in reality you only end up using two of the prongs. One for power and one for ground. The connector needed is the part # A45CB which can easily be used with a switch.
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  • Pigtail Recommendation for a Utility Light part # BUL72CB
    The wiring pigtail to use with the part # BUL72CB that you mentioned is the part # A45CB. This plugs right into the back of the light and gives you the wiring you would need to install the light. The white wire for the harness would be for the ground and the red would be for power.
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  • Replacement Interior Lamp for 2008 Exiss Sport Horse Trailer
    Your existing lamp is an Optronics # BU70CB. The lamp is sealed, so the actual bulb inside is inaccessible. If the bulb burns out, you'd need to replace the entire lamp assembly, part # BU70CB. Because this lamp is rated as a reverse light for when the trailer is backing up, the DOT limits its brightness, and because it's an incandescent lamp it'll have a rather limited lifespan. I'd suggest going with an LED utility lamp like part # BUL72CB. You'd get a lamp that's the same dimensions,...
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  • Recommended Replacement Tail Light for a 2008 Pace American
    If you are looking to replace your current OPT STL 82-RCB, we actually have this exact light available. The Optronics LED Trailer Tail Light - Stop, Tail, Turn - Submersible - 10 Diodes - Oval - Clear Lens # STL82RCB will be the exact replacement you need.
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    Image 1 for Image 2 for
  • Is the LED Oval Trailer Utility Light Brighter than the Incandescent Oval Trailer Back Up Light
    I went out to the warehouse and checked all of our clear oval lights. The Sealed, 6-1/2 inch LED Clear Oval Trailer Utility Light, 10 Diode, item # BUL72CB, whiter light than the light emitted by the incandescent Oval Trailer Back Up Light, item # BU70CB, but the light does not illuminate as large an area as well. The advantages of the LED light is that it does not draw near as much amperage as the incandescent light, it lasts much longer and it does not produce the heat produced by incandescent...
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  • Troubleshooting Optronics BUL72CB Clear Oval 10 Diode LED with Only 4 Diodes Lighting
    If you are using the 2-Wire Pigtail for Optronics Trailer Lights - 2-Prong PL-10 Plug - 10" Lead # A45CB with the Optronics # BUL72CB lights, then all 10 diodes should be lighting. If you are using the 3 wire pigtail # A47PB then you only need to connect the white and red or the black and white wires. The red or black wire should give you the full 10 diodes, where one of them would only give you the center 4. It sounds like the connections are to the wrong spot on your lights since you...
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  • Utility Light for the Back of a Truck for Backing Up a Boat Trailer
    I think I have a better solution for you since a bracket is not available. Take a look at the ball mount hitch light # SRECEIVERS1160X2. This light fits between a ball mount and the face of the receiver on the hitch. You then wire it in to the reverse light circuit. I have included a link to a video review for you.
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  • Is a Rubber Grommet Needed to Install Optronics Oval 10-LED Trailer Utility Light # BUL78CB
    The Optronics Oval 10-LED Trailer Utility Light, part # BUL78CB, is made with a built-in mounting flange for surface-mount installation where there is no cut-out for the fixture. This item includes both ground and positive wire leads that exit from the rear of the housing. This product does not require a rubber mounting grommet as do some similar products from Optronics, although we do offer a snap-on chrome-finish accent ring for it, part # A78CB. For example, their # BUL72CB is a similar...
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  • Flush Mounted LED Lights for Flatbed Trailer
    Thank you for the photos; based on what you showed, you would want oval LED lights that are in the 6-1/2" x 2" range, though you would need exact dimensions to ensure the right fit. For example, # STL72RB is a red oval light that measures 6-7/16" x 2-5/16" x 1-3/4" deep while # STL70RB is another red oval light but with dimensions of 6-1/2" x 2-1/4" x 1-1/8" deep. The same will apply for your white oval lights, such as the 6-1/2" L x 2-1/8" W x 1" # BUL72CB. The other lights look to be...
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    Image 1 for Image 2 for
  • Parts Needed to Add LED Reverse Lights to an ATV Trailer
    Led light # BUL72CB is not certified as use as a backup light. For an LED light that is designed for use as a backup use # BUL10CB. You will also need grommet # a70gb and wiring pigtail # A49PB. For wire you can use # 16-3B-1 sold in 1 foot increments. You will need to wire in the power wire to the reverse light circuit on the 7-Way. For the lights to work you have to have a functioning reverse light circuit on the vehicle side 7-Way.
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  • Comparing Oval 6-1/2" Trailer Tail Lights Red or Clear Lens
    In regards to using a trailer tail lights with clear lens like part # STL88RCB or red lens like part # STL78RB, this will come down to local laws and regulations concerning trailer tail lights. There are certain areas where using a trailer tail light with clear lens is illegal but this is not true for all areas so you will need to check ahead. That said, you would most likely not run into any trouble using either although the red lens is much more common.
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  • Replacement Optronics Clear Oval Trailer Utility Light for BUL72CBGK on a MasterCraft Trailer
    Yes, the difference is that the BUL72CBGK has the grommet included. To replace both the light and grommet you will need # BUL72CB and # A70GB. I looked at a few images of MasterCraft Trailers and while we don't have the exact information of what it was outfitted with, this light appears to be similar, if you are looking for the red light with clear lens you will want # STL82RCB. Typically the number of the light will be stamped on the back of the unit itself. I have linked the above...
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  • What is the Height of the Optronics Sealed 6-1/2 Inch LED Clear Oval Trailer Utility Light
    The depth of this light is 1 inch, and that is measured from the base of the gray back to the top of the lens surface. The height of this light at the electrical connection is 1-3/4 inches. This light is also 6-1/2 inches long and 2-1/8 inches wide. Depending on your needs you might also need the grommet # a70gb, or wire pigtails # A47PB or the # A45CB. I have included a diagram showing these measurements for you, and a couple of videos for your reference.
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  • Recommended 6 Inch Oval LED Backup Light For Brightness
    We have 6-1/2 inch oval LED lights that are very bright, that are typically referred to as 6 inch lights in the trailer industry. I recommend the Optronics GloLight LED Backup Light for Truck or Trailer - Submersible - 22 Diodes, # BUL111CB, because it is a very bright replacement light that that meets the DOT compliant standards. They have a very clean look and are sonically sealed so they can handle all the weather thrown at them. They require a recessed mount # a70gb, and a 2-prong...
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  • Power Options for Utility Lighting on Utility Trailer
    There are a few different ways that you can get power to the LED utility lights on your trailer. The first would be to have a battery directly on your trailer that you could draw power from. This would be the easiest way to get power to your lights. To charge the battery you would need to use a charger like part # CTEK56353 when you have access to a standard wall outlet. One of the perks to using this setup is that you can disconnect your tow vehicle and still use the lights when you need...
    view full answer...
  • Can a Trailer Backup Light be Wired to a Vehicle Trailer Connector
    Oval trailer backup light # BU70CB can be run directly off of the reverse light or 12 volt circuits from a trailer connector. If attached to the 12 volt circuit they would need to be put on a switch such as # PK34513. If wiring into the reverse light circuit they would turn on with the vehicle in reverse and turn off when the vehicle is shifted out of reverse. In either case you would not need a relay. If you wanted to mount the lights inside of a flat surface you can use grommet # a70gb....
    view full answer...

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