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Opti-Brite LED Trailer Dome Light w/ Steel Base - Chrome Plated - 168 Lumens - Round - Clear Lens

Opti-Brite LED Trailer Dome Light w/ Steel Base - Chrome Plated - 168 Lumens - Round - Clear Lens

Item # ILL91CB
Our Price: $17.89
RV Interior Lights
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Shipping Weight: 0.51 lbs
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6-7/16" Diameter round. LED Dome light illuminates your trailer's interior with bright white light. Sturdy, chrome-plated steel base. Surface mount with built-in flange - hardware not included. 2-Wire design. 2 Diodes. Great Prices for the best rv interior lights from Optronics. Opti-Brite LED Trailer Dome Light w/ Steel Base - Chrome Plated - 168 Lumens - Round - Clear Lens part number ILL91CB can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (205)
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  • Videos (2)
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Optronics RV Interior Lights - ILL91CB

  • Dome Light
  • LED Light
  • Surface Mount
  • No Switch
  • 12V
  • 6 Inch Diameter
  • Chrome
  • Optronics

6-7/16" Diameter round. LED Dome light illuminates your trailer's interior with bright white light. Sturdy, chrome-plated steel base. Surface mount with built-in flange - hardware not included. 2-Wire design. 2 Diodes.


  • Round dome light provides bright white light for your trailer's interior
  • 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
  • Sturdy, chrome-plated steel base
  • Clear polycarbonate lens over white LEDs
  • Compatible with 12V DC systems
  • Surface mount with built-in flange - hardware not included
  • 2-Wire pigtail - includes 6" power lead and ground wire


  • Dimensions: 6-7/16" diameter x 1-5/8" deep
  • Distance between mounting holes (center on center): 5-5/16"
  • Light output:
    • Effective lumen output: 168 lumens
    • Raw lumen output: 240 lumens
  • Diodes: 2
  • Power draw at 12.8V: 0.35 amps
  • Lifetime warranty on LEDs

Optronics ILL91 Series LED Interior Dome Light Diagram

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 240 raw lumen capacity and produces 168 effective lumens.

ILL91CB Optronics Opti-Brite LED Trailer RV Dome Light w/ Steel Base - Chrome Plated - 240 Raw Lumens - 2 Diodes - Round - Clear Lens

California residents: click here

Video of Opti-Brite LED Trailer Dome Light w/ Steel Base - Chrome Plated - 168 Lumens - Round - Clear Lens

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

Video Transcript for Optronics Opti-Brite LED Trailer Dome Light Review and Installation

Jake: Hey guys, it's Jake here with etrailer. Today we're going to be taking a look at and I'm going to show you how to install the Opti-Brite LED dome light for trailers. This is going to be a great replacement for your factory lights, whether they not be bright enough for you, or if you want to add additional lighting to your trailer.So maybe your trailer has those incandescent bulbs already and you want to switch over to LEDs because you want their bulbs to last longer, you want them to burn brighter, and you want them to draw less power so that you can add more light. This is going to be a great option.The lights are going to have a sturdy chrome plated steel base, so that chrome is going to give it a nice stylish look, while the steel is going to give it a nice strong base so that it lasts for a long time. What I like about these lights is they're going to have a nice large polycarbonate lens that's going to be clear, so it's going to give you a nice clear white light down in your trailer.The lights are going to have a flush mount design, so they're going to mount nice and flat up against whatever you're wanting to mount them on. You have the option to mount them on your ceiling like we did here or on the wall.Now personally, the thing that I like most about these lights is that when I'm working in a trailer or if I need to just see to be able to unload something out of the trailer, I don't want it to be crazy spotlight bright in here.

These lights are going to have a 2 diode LED and they're going to have 240 lumen light, each one of them, so it's not going to be crazy bright, but it's going to give you more than enough light to be able to see what you're doing.The light is going to have a total diameter of 6-7/16" wide and it's going to have a nice low profile design and it's going to come in at 1-5/8". Something to keep in mind is that we did use six of these lights in our trailer, which is where we're getting our light from. If you are looking to just pick up one light, we do have brighter options available.Now that we've gone over some of those features, let's go ahead and show you how easy they are to get installed. Now we can go ahead and get our first light in place. You can see here is our factory light.

We only have that one light in our 20' trailer here, so we'll go ahead and get our light in place.You're going to want to decide where you're going to want to put it. We're going to put ours up on these rails, so that'll mean we're only going to be using two of the four holes, or you could put it on the sidewall and just run your wires through the wall if you want more of a indirect light.So we'll go ahead and get ours in place up here. You can see we've made a mark 24" off the sidewall. You're going to need to choose where you're putting your lights. We're putting six lights up in on trailer, so we have them all evenly spaced throughout the trailer.

I'll go ahead and line our center hole up and we put in our first screw.Now these lights do not come with the screws, so you will have to provide your own hardware. Now we have six lights going up in this trailer today, so we're going to go ahead and get our other five lights mounted and then we'll start wiring.Now that we've got our lights all hung up in place where we want them, we can go ahead and splice into the power wire that we already have in place for our original light. Now if you are running a new line, you'll need to run this to the positive on your battery, and then you'll want to ground each of the lights. Let me go ahead and do that now.Put on a butt connector. We're using heat shrink butt connectors just so we have an extra safety precaution.

Then we splice our wire into our existing power wire, running it back together. Then we can crimp it. After you get your power hooked up you'll want to ground your ground wire to someplace on the frame. We're just going to use a self-tapping screw and screw it into our frame rail. We'll go ahead and take our self-tapping screw and install it up and out of the way. There we go.Now that we've got that in place, we can go ahead and test out our light. Go ahead and flip on our light switch and we see that it's working. Now we can go ahead and get the rest of our lights wired up. Once you have all your wires tucked up and out of the way, that will complete your install.With all that being said, that's going to do it for a look and installation of the Opti-Brite LED dome light for trailers.

Customer Satisfaction Score:

Customer Reviews

Opti-Brite LED Trailer Dome Light w/ Steel Base - Chrome Plated - 168 Lumens - Round - Clear Lens - ILL91CB

Average Customer Rating:  4.8 out of 5 stars   (205 Customer Reviews)

6-7/16" Diameter round. LED Dome light illuminates your trailer's interior with bright white light. Sturdy, chrome-plated steel base. Surface mount with built-in flange - hardware not included. 2-Wire design. 2 Diodes.


The lighting in my cargo trailer contained 4 incandescent fixtures that had burned out bulbs most of the time. They never were really bright even when all worked. I took this pair of photos at night so you can see the difference. The LED lights burn cooler, use less of my storage battery charge, and the bouncing of the highway won't harm them. Well worth the price and an easy installation.


Great replacement for the incandescent bulb lights for the engine compartment of our boat. Easy to install and a clean white light


We used these in our vintage airstream renovation. The fit the hole perfectly and were easy to install.


Product worked out perfect. Installed the lights in my trailer.


Great product, very simple install, much brighter than regular cargo trailer lights. Very Fast delivery, nice folks!!!


Plug and Play replacement for Workhorse P42 (Morgan Olson) cab light. I wanted to decrease the power consumption on battery. It went from 2.2 Amps to 0.35
It's plenty bright enough to illuminate the cab area while saving my batteries to start this antique 396 diesel motor.

The Cab light continues to work great. Brighter than the stock light and pulls less current.
Richard K - 08/13/2021


Perfect dome light for our just restored 1969 Scotty Sportsman camper. THANKS!


Great product


Thanks this is great service and I can plan on my parts when I need them


These lights stopped working after only a few months in our travel trailer. After my husband checked the wiring and was not able to get them working properly, I contacted etrailer and they said I can ship them back at my expense and they would fix or replace them. A few weeks later 2 new lights were delivered, they are new and the design seems better. So far so good with the second set.


Used two in my cargo trailer and hooked them up to a 12 volt battery that is charged by a 4amp solar panel so I can light up the trailer when disconnected from my truck. They work great and easy to install.




I used these to retrofit and update a horse trailer. They are brighter than the originals and easy to wire. Plus as always excellent service from etrailer.


I like doing business with etrailer, they have virtually anything I'm looking for. If I have a problem they take of it immediately, and they always follow-up to make sure I'm satisfied. They have restored my faith in customer service. I'm sure I'll be doing business with etrailer for a long time!!!!!!!


Was looking for a low power light just bright enough for us to see while we tore down our race car at the end of the night and these worked perfectly. Installation was easy and they provide a nice, even light.


I needed to have an on/off switch which I didn't notice it was missing. But it looks good and is of good quality.


.great light for the price. As always etrailer is awesome to deal with.


Product was a perfect replacement for the original incandescent lighting in my service truck


Great selection and pricing. Cheap alternative for re-doing my horse trailer. Thank you so much!


Lights installed well and worked as advertised.


Used them in my boat engine compartment and they work great!


Looks good just installing now so I don't know how bright it is at night.


I am very pleased the RV lights. They worked out great . The customer service was excellent and very informative . Thank You


Brighter than expected. Wish it had a on off switch on it but I'll just wire one in.


Lights fit and work like advertised!

Show More Reviews

See what our Experts say about this Optronics RV Interior Lights

  • Circuits Based on Wire Color for the LED Dome Light ILL91CB
    On the light part # ILL91CB that you referenced the white wire is the ground circuit and the black is the 12 volt power circuit.
    view full answer...
  • Removing Lens Cover of Opti-Brite LED Dome Light # ILL91CB
    If you did have the Opti-Brite LED Dome Light # ILL91CB installed in your trailer the lens would remove after you unscrewed the 4 screws around the perimeter of the clear section.
    view full answer...
    Image 1 for
  • Recommended LED Dome Light For Portable Fish House
    The Opti-Brite LED Dome Light w/ Chrome Plated Steel Base - 6-7/16" Round - 2 Diodes - Clear Lens, # ILL91CB, is able to be connected to the battery like you mentioned. Actually all of the lights will function if conneced in that way. This light only puts out 168 lumens or less than a 25 watt lightbulb. I've attached a video for you. The Opti-Brite LED Dome Light - 11" Long x 4" Tall - 16 Diodes - Cool White, # ILL06COB, is able to give an effective lumen output of 354 lumens or close...
    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...
    Image 1 for
  • Warm LED Lighting For 7 X 14 Cargo Trailer
    For ceiling lights in a cargo trailer you have several choices with LED lighting. First the OptiBright # ILL91CB is one of the many 3" round ceiling lights, each having bright white light and a 168 lumen brightness. They are not very bright. If you wanted dim light, I would put two of them every two feet. If you wanted to put in a work bench and fix small parts you would neet to at least triple that. For brighter lights (560 lumens) consider the Command # 328-007-60WE utility light, or...
    view full answer...

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Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Jameson C
Expert Research:
Jameson C
Employee Jacob T
Video Edited:
Jacob T
Employee Cole B
Installed by:
Cole B
Employee Jacob H
Installed by:
Jacob H
Employee Amy B
Written by:
Amy B
Employee Brian T
Updated by:
Brian T
Employee Michael B
Video by:
Michael B

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