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  1. RV Interior Lights
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  4. LED Light
  5. Surface Mount
  6. No Switch
Opti-Brite Low Profile LED RV Dome Light - 390 Lumens - Round - Clear Lens - 12V/24V

Opti-Brite Low Profile LED RV Dome Light - 390 Lumens - Round - Clear Lens - 12V/24V

Item # ILL39CB
Our Price: $56.44
RV Interior Lights
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7" Diameter. Low-profile dome light illuminates your RV's interior with bright white light. Low-voltage cutoff prevents battery drain. Surface mount with built-in flange. 2-Wire pigtail with 0.18 male bullets. 39 Diodes. Great Prices for the best rv interior lights from Optronics. Opti-Brite Low Profile LED RV Dome Light - 390 Lumens - Round - Clear Lens - 12V/24V part number ILL39CB can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (18)
  • Q & A (0)
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Optronics RV Interior Lights - ILL39CB

  • Dome Light
  • LED Light
  • Surface Mount
  • No Switch
  • 7 Inch Diameter
  • 12V
  • 24V
  • Daylight White
  • White
  • Optronics

7" Diameter. Low-profile dome light illuminates your RV's interior with bright white light. Low-voltage cutoff prevents battery drain. Surface mount with built-in flange. 2-Wire pigtail with 0.18 male bullets. 39 Diodes.


  • Low-profile, round dome light provides bright white light for your RV's interior
  • Low-voltage cutoff - light shuts off at 11 volts to prevent battery drain
  • 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
  • Sealed, waterproof construction
  • Durable polycarbonate lens and housing
  • White LEDs with clear lens
  • Compatible with 12V and 24V DC systems
  • Mounts on surface of trailer with built-in flange - hardware not included
  • 2-Wire pigtail with protective casing
    • Includes 16-gauge power lead and ground wire with 0.18 male bullets


  • Dimensions: 7" diameter x 5/8" deep
    • Light face: 6" diameter
  • Distance between mounting holes (center on center): 5-1/2"
  • Light output:
    • Effective lumen output: 390 lumens
    • Raw lumen output: 460 lumens
  • Diodes: 39
  • Power draw at:
    • 12.8V: 0.669 amps
    • 24V: 0.217 amps
  • Lifetime warranty on LEDs

Optronics ILL39 Series Opti-Brite LED Dome 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 460 raw lumen capacity and produces 390 effective lumens.

ILL39CB Optronics Opti-Brite Low-Profile LED RV Dome Light - 390 Lumens - 39 Diodes - Round - Clear Lens - 12V/24V

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Customer Satisfaction Score:

Customer Reviews

Opti-Brite Low Profile LED RV Dome Light - 390 Lumens - Round - Clear Lens - 12V/24V - ILL39CB

Average Customer Rating:  4.8 out of 5 stars   (18 Customer Reviews)

7" Diameter. Low-profile dome light illuminates your RV's interior with bright white light. Low-voltage cutoff prevents battery drain. Surface mount with built-in flange. 2-Wire pigtail with 0.18 male bullets. 39 Diodes.


Took a gamble on this light to replace the 5-led gig light over the vanity in our Cedar Creek Cottage RV. We couldn't be more pleased with the additional white light it affords us. A pleasure to deal with and I'll keep them in mind for future RV-related purchases. ??????


Definitely worth the money. More than enough light in the trailer now.


This light provides adequate illumination for reading about 40" below. The OEM lights in the ceiling of my 5th wheel did not provide enough light. This light is mounted on the underside of a cabinet and about 18" below the OEM lights (Similar to PN DG52445VP). This light was tested versus the etrailer branded light (PN DG52653VP) and although the lumen rating seems similar this light provides significantly more light. This light does require a separate switch and I used a PN 37215225 dimmer which works great but the dimmer function is not necessary for use as a reading light.
Customer Service from etrailer is wonderful as the one light was returned for credit without any issues and a second ILL39CB ordered.


The product was just as shown and listed. We actually used it to replace an older, larger light over our dining table in our motor home. The other light was outdated, and hung down over the table, so it drew attention to how outdated it was. This light mounted flush with the ceiling, gives out more light than the old one, and looks ten times better. Also, it still works with the dimming feature that is build into the switch, so we didn't even lose that function. Installation was really easy. I would recommend it with no reservations.


This is a very good product. I replaced six 4 ft long 12V fluorescent lights with 6 of these lights. My question for Jason was if my existing lights could be replaced 1 for 1 with these new LED lights. He said "yes" and attached a picture from another trailer. Boy they sure do light up the inside of my trailer now! Thank you!!


I got this installed in my Little Debbie truck and the light it puts off is outstanding. I will be buying another one for the front of my truck.

Tony S.




I replaced the lamp in my trailer because the lamp that came with it was quite dim. This light is bright enough to find my tools in the darkest corners!


Excellent interior light for a work van or box truck.


Super fast shipping! Even to Alaska! Light worked well and is way brighter than the old one. One small thing, I wished it would have come with the female receptacles too. I ended up dikeing off the ones that were on it and spliced them in. Seems like a waste.


Very reliable, wish they were just a little brighter.


The Lights Really Illuminate The interior of the trailer nicely
Highly Reccomended


Nice & bright!! Going to order 2 more. Appreciate etrailer customer service & immediate shipment


Great product and lightning fast shipping. Would highly recommend.


Provides a great light







See what our Experts say about this Optronics RV Interior Lights

  • Amperage Draw for Optronics LED Light part # ILL39CB
    The LED Dome Light # ILL39CB that you referenced draws .669 amps when used with a 12 volt circuit like what would be on your camper and if used in a 24 volt setup would draw .217 amps.
    view full answer...
  • LED Dome Light 22 Inches Long x 7 Inches Wide
    The closest option we have to what you are looking for other than the # ILL10CCB you referenced is the LED RV Utility Light part # ILL06COB which measures 11" long x 4" wide. This light does however mount a little differently which you can see in the attached photo. We do not have have an LED dome light that is 22" long x 7" wide unfortunately.
    view full answer...
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  • Can Trailer LED Ceiling Lights Be Connected and Run Off Single Switch?
    The Opti-Brite Low Profile LED RV Dome Light - 390 Lumens - Round - Clear Lens - 12V/24V # ILL39CB can absolutely be connected to each other to give you one switch for multiple lights. I've attached a photo of an enclosed trailer that used 5 lights down the center. This is a similar length trailer so you can use it as a guide if you want more lighting. You obviously already know how to run multiple lights so this setup won't be any different it just won't draw the same amount of power...
    view full answer...
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  • What Replacement Circular Dome Light Do You Recommend for My RV?
    I have a solution for you. Unfortunately, the largest diameter dome light we carry is the 7-inch Opti-Brite Low Profile LED RV Dome Light - 390 Lumens # ILL39CB. However, if you are looking for something larger, we do carry a 10-inch diameter fixture that is the Gustafson LED RV Ceiling Light # GUS54FR.
    view full answer...
  • 12V LED Lights for Inside a Cargo Trailer
    There are many 12V LED lights which are available for the inside of a cargo trailer. The thing about LED lights, however, is that you are never going to have to pull a light out of the socket and replace it with a new one. For example, the Optronics # RVILL34 is a surface-mounted LED light with 18 diodes, which is what provides the light. They last very long with just 0.6 amps of power draw and a lifetime warranty for the lights. You can see how bright the lights are by the photo I've added....
    view full answer...
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  • Replacement LED Low Profile Dome Light For RV
    I have a solution for you. We do not have a 6-1/2 inch diameter light but we do have a 6 and a 7 inch. Opti-Brite Low Profile LED RV Dome Light - 214 Lumens - Round - Clear Lens - 12V/24V # ILL21CB. Opti-Brite Low Profile LED RV Dome Light - 390 Lumens - Round - Clear Lens - 12V/24V # ILL39CB.
    view full answer...
  • Comparing Optronics LED Dome Lights ILL24CB and ILL39CB for Use in Ice House
    Both of the Optronics LED dome lights you referenced, 24-diode # ILL24CB and 39-diode # ILL39CB, feature sealed water-resistant housings, a lifetime warranty on their LEDs and superior electrical efficiency - using about one-tenth the power of standard incandescent lights. The advantages of the # ILL39CB are that it can work in both 12V and 24V systems and that it includes a built-in low voltage cut-off (when the battery's output drops to 11 volts) to prevent battery drain. Unless you...
    view full answer...
  • Dimensions of the LED Dome Light # ILL39CB
    I went out into our warehouse to measure one of the LED Dome Lights part # ILL39CB we have in stock. The overall width is 7 inches including the mounting flange, without that flange is measures 6 inches across. The thickness is 1/2 of a inch.
    view full answer...
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  • Does the LED Interior Trailer Dome Light ILL39CB have a Kelvin Rating
    We display color temperature when that data is supplied to us from the manufacturer. We do not have a way to test for it here so we go with what we've got. Optronics did provide the lumen output which is a measure of light output in all directions. Light # ILL39CB has an effective lumen output of 390 lumen. There isn't a lumen to Kelvin conversion formula because they measure different things. If you are looking for a measure of brightness then lumen is what you need. If you want to know...
    view full answer...
  • Is the Optronics LED Interior Trailer Dome Light # ILL39CB Dimmable
    If the light switch that you are connecting it to has a dimming feature then yes, the LED Interior Trailer Dome Light # ILL39CB can be dimmed. The dome light does not have a built-in dimming switch though, so if that is what you are asking the answer is no.
    view full answer...
  • Replacement LED Strip Light with Tail Light, Brake and Turn Signal Function for 2015 Cedar Creek 5W
    I may have a solution for you, but most of our larger ceiling lights have switches built in. However, you can use a puck light like the LED RV Interior Light # 328-K-1050Q9, which does not have a switch and mounts on the ceiling surface. These lights are 4-1/2" in diameter and come with 9 bright LED diodes to provide a small and easy to install light solution for your Cedar Creek 5th Wheel. Another option would be the Opti-Brite Low Profile LED RV Dome Light - 390 Lumens - Round - Clear...
    view full answer...
  • Is it Possible to Run 3 of the LED Dome Light # ILL39CB to a Single Switch on a Trailer
    Yes, there is no reason you couldn't run the power wire of three of the # ILL39CB to a switch so that they would all turn on at the same time. For a switch you could use the part # D16740. You will want to run the 3 power wires from the lights to the switch and then run a wire from the 12 volt power circuit of the trailer connector to the other side of the switch so that when you flip the switch on power is delivered to all three lights. You will need to ground the assemblies individually. I...
    view full answer...
  • LED Lights and Dimmer Switch Compatibility
    The Optronics LED RV Interior Light with Switch - 9 Diode - Surface Mount # RVILL33 is a dimmable LED Light when used with a compatible dimmer switch. We don't carry the dimmer switch, but according to my contact it will be compatible. They said the switch will dictate how well it dims. Many other lights like the LED Interior Trailer Dome Light - 39 Diode - White Housing # ILL39CB can also be dimmed using a dimmer switch, but there are a few lights that are not dimmable. The LED lights...
    view full answer...
  • Simple Light Needed for Horse Trailer Tack Room
    The easiest thing to use/install is the NightMinder RV Task Light # NM-Motion-011. This is a battery powered light that uses 3 AAA batteries (not included). All you need to do is get rechargeable batteries to avoid purchasing batteries constantly. It would also be good to get at least 6 batteries so you can have some charging while the others are in use. Obviously if you want to use more than one of this light then you'll want to get the appropriate amount of batteries. If you'd like something...
    view full answer...
  • Optronics LED Interior Lights That Function on Dimmer Switch
    The Optronics LED Trailer License Plate Light # LPL11CB that you referenced WILL work on a dimmer; my contact at Optronics was kind enough to test it. This light operates down to 5.4V at which power input it is fairly dim. Optronics LED Interior Light # RVILL33 is also a dimmable LED Light when used with a 12V dimmer switch (which we don't carry) and so is # ILL39CB.
    view full answer...
  • How Many Optronics 39 Diode LED Dome Lights # ILL39CB Are Needed for 7 x 16-foot Enclosed Trailer
    The LED dome light you referenced, Optronics 39 Diode LED Dome Light # ILL39CB, will generate a substantial light output, far more than 24-LED equipped lights. If you are looking to have enough light in your enclosed trailer to allow you to work on your bikes, then I expect that three of these units would deliver enough light to properly illuminate most if not all of the trailer's interior.
    view full answer...

Info for this part was:

Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Cole B
Installed by:
Cole B
Employee Amy B
Updated by:
Amy B
Employee Wilson B
Updated by:
Wilson B
Employee Ronnie R
Updated by:
Ronnie R
Employee Carrie F
Updated by:
Carrie F

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