4" to 3" Conversion Kit
Convert a standard 4-inch recessed housing into a refined 3-inch mud-in light with a smooth, finished ceiling look.
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What's Included
4" to 3" Conversion Kit
Sale price$67.99
4" to 3" Conversion Kit
Resources
Installation Guide
Curved Specs
Round Specs
Square Specs
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Performance Overview
What you can expect from your 4" to 3" Conversion Kit.
Light Quality
Comfortable, low-glare light
Designed to feel soft and easy on the eyes throughout the day
Color Temperature
Choose your preferred tone
Switch between 2700K, 3000K, and 4000K to get the look you want
Brightness
Bright, everyday illumination
Provides strong, efficient light for daily living
Durability
Built to last
Made for long-term performance and suitable for damp spaces
Easy to Install50k+ Hours5-Year Warranty
Built for existing 4-inch housings
Size Down Without Starting Over
This kit lets you create a smaller 3-inch opening using the recessed housing already in place. The screw-in mud plate reduces the aperture, while the LED module and trim complete the upgrade without major ceiling work.
Finished flush with joint compound
A More Refined Ceiling Line
Designed for a smooth mud-in finish, this setup hides the hardware and leaves behind a clean, built-in look. Choose Round or Curved trim styles, then add the proper E26 or GU24 adapter if your current housing needs one.
Why OPTI
Designed for performance
Features
Uniform Light
Warm Dim
Deep Dimming
Enhanced CRI
Low Glare
Premium Material
Standard Lights
4" to 3" Conversion Kit
Resources
Installation Guide
Curved Specs
Round Specs
Square Specs
View Dimensions
Frequently Asked Questions
What is the 4" to 3" Conversion Kit and what does it include?
The 4" to 3" Conversion Kit lets you retrofit an existing 4" recessed housing with a 3" aperture - no ceiling demolition required. It includes a screw-in mud plate, a Light Module, and a trim. All variants use a recessed (mud-in) trim finish.
Who is the 4" to 3" Conversion Kit for?
Homeowners and contractors who want to replace a 4" fixture with a smaller, more refined 3" aperture without replacing the housing or cutting new holes. It is ideal for remodels where downsizing the aperture size is the goal.
What does the mud plate do?
The mud plate screws into the existing housing and reduces the opening to a 3" aperture. It is finished flush with joint compound - the same process as any mud-in trim - so the result is a clean, seamless aperture with no visible hardware.
What trim styles are available?
All variants of the 4" to 3" Conversion Kit use a recessed mud-in (trimless) trim finish. Curved and Round shapes are available. For an exposed trim look, see the Remodel Can Recessed Light instead.
How does the 4" to 3" Conversion Kit install?
Screw the mud plate into the existing housing. Connect the module to the housing's wiring. Set the mud-in frame flush and finish with joint compound. No housing replacement or additional ceiling cutting is needed.
Do I need an electrician?
If the existing housing is already wired, the install is DIY-friendly. The mud-in finishing step is a drywall task. If you are wiring a new housing from scratch, a licensed electrician should handle that step.
Is the Conversion Kit dimmable?
Yes. The included module is fully dimmable with any LED-rated dimmer.
Is the module replaceable?
Yes. The module snaps out and swaps independently - the mud plate, housing, and wiring stay in place.
Not sure what you need?
Reach out and we’ll help you choose the right lights, build your order, and make sure everything fits your project.