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Optronics Low Profile LED Utility Light w/ Steel Housing - 53 Lumens - Rectangle - Clear Lens

Optronics Low Profile LED Utility Light w/ Steel Housing - 53 Lumens - Rectangle - Clear Lens

Item # ILL31CB
Our Price: $19.82
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RV Exterior Lights
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Shipping Weight: 0.22 lbs
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5-3/4" x 2-3/4". Low-profile LED dome light illuminates an RV's interior with bright white light. Durable steel housing and replaceable polycarbonate lens. Semi-recessed mount. 2-Wire design. 10 Diodes. Great Prices for the best rv exterior lights from Optronics. Optronics Low Profile LED Utility Light w/ Steel Housing - 53 Lumens - Rectangle - Clear Lens part number ILL31CB can be ordered online at or call 1-800-496-5010 for expert service.
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  • Reviews (14)
  • Q & A (0)
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  • Why etrailer?

Optronics RV Exterior Lights - ILL31CB

  • Utility Light
  • LED Light
  • 12V
  • Silver
  • 5-1/2L x 2-1/2W Inch
  • Surface Mount
  • Optronics

5-3/4" x 2-3/4". Low-profile LED dome light illuminates an RV's interior with bright white light. Durable steel housing and replaceable polycarbonate lens. Semi-recessed mount. 2-Wire design. 10 Diodes.


  • Low-profile LED dome light provides bright white light for your RV's interior
  • 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 steel housing and replaceable polycarbonate lens
  • Clear lens with white LEDs
  • Compatible with 12V DC systems
  • Semi-recessed mount - requires cutout
  • 2-Wire design includes power lead and ground wire


  • Dimensions: 5-3/4" long x 2-3/4" wide x 15/16" deep
  • Distance between mounting holes (center on center): 4-11/16"
  • Light output:
    • Effective lumen ouput: 53 lumens
    • Raw lumen output: 70 lumens
  • Diodes: 10
  • Power draw at 12.8V: 0.024 amps
  • Lifetime warranty on LEDs

light dimensions

Raw Lumens vs. Effective Lumens

Lumens are used to measure the amount of usable light that is put out by a light source. Raw lumens represent the number of lumens that the manufacturer claims the LEDs are capable of producing. It does not include the light's drive method or the amount of light lost from the lens or reflector. Effective lumens take these factors into account and represent the number of lumens that are actually produced by the complete light assembly, not just the amount of light that the diodes are capable of producing. This light has a 70 raw lumen capacity and produces 53 effective lumens.

ILL31CB Optronics Low Profiel LED Interior Utility Light - 10 Diodes - 70 Raw Lumens - Semi-Recessed - Steel Housing

Alternate part number: ILL-31CB

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Optronics Low Profile LED Utility Light w/ Steel Housing - 53 Lumens - Rectangle - Clear Lens - ILL31CB

Average Customer Rating:  4.5 out of 5 stars   (14 Customer Reviews)

5-3/4" x 2-3/4". Low-profile LED dome light illuminates an RV's interior with bright white light. Durable steel housing and replaceable polycarbonate lens. Semi-recessed mount. 2-Wire design. 10 Diodes.


These lights are great! I got 4 of them for a 6x10 trailer, and it lights the trailer up as good as daylight.

You can see from the pictures how well it works.

Installation is simple, cut an opening to fit the back of the light, and screw it in through 4 mounting holes. Screws are not included, but I used 4 flat head (countersink) #8 x 3/4 inch wood screws.


The light is what I ordered. I got 4 total, they came in a big box with no packing buffer. I hope they all work.


I just finished this project up. I used eight of the LED RV Interior lights in a 40' shipping container and they worked great.


Super fast shipping


I purchased the LED light as a change out of my internal light in my utility trailer... After a year it still works great.... It is enough light to see whats in my 8 x 10 foot utility trailer, but it is not super bright..... LED lights are great since they don't attract mosquitoes.


Decent lights for the money, easy to install. I purchased 5 for my 6 x 12' enclosed trailer. I was disappointed with the brightness of them. Based on the right up and some misleading pictures I thought 5 lights in such a small space that the trailer would be like day light with them on but not so much. I recently sold the trailer but if I was to do it again I would by brighter ones.


Excellent product, flush mount. I used these to light shelving areas inside an enclosed trailer. Perfect! The shelve spaces are now lit up like daylight!

by:, great website, easy to use, found what I was looking for, delivered on time, I would use again.


Product was a perfect fit for my daughters Polaris battery powered ATV. Thank for the great selection


Great replacement light in KW door!!


This seems to be a nice light for the price point. I would purchase it again if I was in the market for one.


They were okay


Worked perfectly


Great product


See what our Experts say about this Optronics RV Exterior Lights

  • How to Wire the LED RV Interior Light # ILL31CB to a Battery on a Trailer
    First thing you will need is a battery for your trailer. A deep cycle battery is usually recommended and not an automotive battery. You are going to need to run a main power wire that each black wire of the LED Lights part # ILL31CB will run to and then a main ground wire that all of the white wires of the light will run to. You will then need to install the switch on either the power or ground circuit main line. You will just cut the wire between the battery and the lights and then wire...
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  • Will the LED RV Interior Light # ILL31CB Produce More Light than a Fluorescent Bulb
    LED lights will almost always be brighter than fluorescent lights when comparing similar sized lighting fixtures and they should draw much less amperage. I could not find any information on the 18 inch fluorescent light that you referenced but I would be strongly inclined to believe that the LED RV Interior Light # ILL31CB will be much brighter than an 18 inch fluorescent bulb. Check out the video I put together for you where I demoed a # ILL31CB in a dimly lit environment to show you...
    view full answer...
  • Will an Extra Power Source Be Needed on Horse Trailer to Add Camera, 12V Fans, and LED Lights
    To ensure that you will be fine after adding the camera and the 12V fans, you will want to verify the amperage draw on the fuse protecting your vehicle's 12V power wire in the towing package. Then you will want to determine the amp draw of the 12V fans and the camera to make sure that they will not exceed the fuse's amp draw. Typically vehicle's have a 40 amp fuse protecting their trailer wiring 12 V power wire. I think you should be fine adding the camera and the fans, but you can...
    view full answer...
  • Interior 12 Volt LED Light Recommendation for a 7 x 14 Foot Enclosed Trailer
    The LED RV Interior Light, # ILL31CB, runs off of a 12 volt DC system. It actually draws 0.107 amps at 12.8 volts. It will not work on a 110 volt AC system. This light is a surface mount light meaning the light will not be flush with the wall or ceiling once installed, it will stick out some. But part of the light from the mounting surface will need to be recessed into the wall. I would do at least 2 rows of 3 running the length of the trailer. A better option for a true surface mount...
    view full answer...
  • Would Optronics Thinline Opti-Brite Interior Strip Light Work As Lighting For a Trailer Workbench
    I believe I have the perfect solution to light your workbench! Check out the Optronics Thinline Opti-Brite LED Interior Strip Light # ILL72CB. This light measures 21-7/8 long x 1 wide x 5/8 thick inches. It has 5/32 inch mounting holes on 21-9/32 inch centers. This light has 27 diodes and puts out 513 effective lumens. This is a 12 volt, hard-wire light that has a 4 inch lead and ground wire exiting out the back in the center. You would need only four lights to cover your entire work...
    view full answer...
  • Which Wire is Ground Wire on Oval LED Clearance # MCL31AB and LED RV Interior Light # ILL31CB
    The white wires of both the Oval LED Trailer Clearance # MCL31AB and the LED RV Interior Light # ILL31CB are the ground wires and the black wires are the 12 volt power wires.
    view full answer...
  • Comparing Optronics LED Lights Candela Output
    My contact at Optronics was able to give me a brightness comparison between their LED lights # BUL78CB and # ILL31CB. Although both use 10 LEDs, the BUL78CB uses super diodes that deliver a lot more actual light output. Optronics was able to give me the candela specification for each light. This scale differs from lumens but it still gives you a good comparison basis. A common candle emits light with a luminous intensity of roughly one candela. Light # ILL31CB offers 44 candela output...
    view full answer...
  • Recommended Replacement Interior RV LED Light for Above Kitchen Sink
    The Optronics LED RV Interior Light # ILL31CB could work well for you as a replacement light. I have attached the dimensions of this light for you. You can measure your existing light to see if the ILL31CB has comparable measurements. This light will need to be connected to a switch in order to turn it off and on. Another great option, and the light I recommend, is the Optronics LED RV Interior Light with Switch # RVILL33. This light will allow you to turn the light on and off by a switch...
    view full answer...
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  • Interior LED Lights for a 7 x 22 Foot Area in an Enclosed Horse Trailer
    Six of the RV LED interior light # ILL31CB should provide adequate light for your trailer. More so than the incandescent bulbs in # 30-76-243. What I recommend though is to go with the LED 24 diode light # ILL24CB. The additional diodes will provide even more light than the 10 diodes in the light you referenced. I have linked a video review for you. The other option is to go with an LED flood light like # TLL48FB which has a 1200 lumen rating which would be like a vehicles headlights...
    view full answer...
  • How Does the LED RV Interior Light # ILL31CB Turn On and Off
    The LED RV Interior Light, # ILL31CB, would have to be wired to a switch to turn off an on. If the old lights were wired to a separate switch, like on the wall, this light would wire in the same way. If you needed a switch, you could use something like # BL0108-00. Power from the trailer would go in to a terminal on the switch and the power wire to the light would also connect to the switch.
    view full answer...

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Info for this part was:

Employee Tyler C
Written by:
Tyler C
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Lori W
Expert Research:
Lori W
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T

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