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Discover the cost to install recessed lighting. Discover how price factors, labor, and other considerations can help you save on your lighting project.
Recessed Lighting Calculator: How Many Recessed Lights Do I Need?
See the light with this recessed lighting calculator
Get quotes from lighting pros near you
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Get quotes from lighting pros near you
No obligation · 100% free
Need Help With a Project? Connect With a Pro
A recessed lighting calculator helps you map out fixture placement based on your room's square footage, ceiling height, and spacing needs for balanced illumination.
Expect to pay $100 to $300 per fixture for professional recessed lighting installation, so planning your layout carefully helps control your total project cost.
Your ceiling height determines spacing between lights using a simple formula: divide your ceiling height in feet by two to find the distance in feet.
Hiring a local light fixture installation professional removes the guesswork from electrical wiring and ceiling cuts, keeping your installation safe and on track.
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Ready to revamp your lighting? Recessed lights let you illuminate your space in a discreet, minimalist way—but installing them requires a little bit of planning. And if you decide to map out your lighting layout yourself, one of your first questions will probably be: How many recessed lights do I need? Here’s how to figure it out.
How Many Recessed Lights Do You Need?
There are several factors to consider when deciding how many recessed lights you’ll need in a room, including the purpose of the lighting, the wattage of the bulbs, and the height and color of your ceiling.
However, a good rule of thumb is to install lights 4 to 6 feet apart, with all lights positioned at least 2 feet from the walls. Based on that, here’s how many recessed lights you’d need for rooms of different sizes:
| Room Dimensions (in Feet) | Room Size (in Square Feet) | Number of Recessed Lights Needed |
|---|---|---|
| 10x10 | 100 | 4-6 |
| 12x12 | 144 | 4-6 |
| 12x18 | 216 | 6-8 |
| 14x20 | 280 | 8-10 |
| 20x20 | 400 | 12-14 |
Calculating the Number of Recessed Lights You Need
Drawing a layout of your room is the best way to figure out how many recessed lights you need. But first, you’ll have to figure out the right amount of spacing between lights, which you can do with this formula:
Spacing Between Recessed Lights (in feet) = Ceiling height (in feet) / 2
How to Measure for Recessed Lighting
Whether you’re installing recessed lighting in your kitchen, living room, or another part of your home, your first step is to get the dimensions of the space. You’ll need three measurements:
Length of the room
Width of the room
Height of the ceiling
Next, sketch out the layout of your room with a pencil and paper. It should include these dimensions, as well as the locations of any existing light fixtures or ceiling fans, furniture, and appliances.
Then, use the formula above to calculate the appropriate distance between lights. For example, if you have 10-foot ceilings, your lights should be 5 feet apart. Each light should also be 2 or 3 feet from the walls.
Finally, decide how you’d like to arrange the lights (for example, around the perimeter of the room or in parallel lines). Then, use the spacing guidelines to mark the locations of the lights on the map you drew of the room.
Who to Hire to Install Recessed Lighting
These guidelines can help you map out a design for your lighting. But when it’s time for installation, it’s safest to hand your plans over to a professional who can install recessed lighting. That’s because this job involves working with electricity, running new wiring, and cutting holes in your ceiling—all tasks that are better left to a local light fixture installation pro.
Frequently Asked Questions
Lighting services reviews from real Angi homeowners in Columbus, OH
4.5★ avg. • 13 total reviews
- Ronald A.
Custom Paint Jobs LLC gave our office a fresh new look. Clients love it!
Custom Paint Jobs, LLC - John S.
Best painters in the Greater Columbus, Ohio area. Quality of work second to none and customer service is head above shoulders than everyone else. I cant wait to work on another project with Silvio and Team!
- Lauren R.
The Mosby team went above and beyond for my project. They not only installed my light fixture; they also worked through an old, wonky, and as it turns out incorrect wiring issue from the work of prior contractors. Professional, thorough, conscientious, and kind. Five star experience. Thank you!
Mosby Electric - Locke M.
We had a 20+ year old landscape lighting system that needed replacement. Midwest Lightscapes worked with us to design a much improved lighting system, lighting the exterior of the house and the back yard. Installation of the 45 light system took one and one-half days, and went very smoothly....
Midwest Lightscapes - Stephen D.
Jeff was a consummate professional. Responsive, courteous, and focused on meeting our needs. I had a small project of installing and replacing two ceiling light fixtures. He responded to my Home Advisory inquiry within 24 hours and in a span of two weeks our light fixtures were installed. ...
- Stephanie S.
For several months I was looking for somebody to tile a wall in my master bath and move lighting fixtures, and could not find anybody who was responsive. I contacted Rowe through Home Advisor and within days they came by to assess the job and provide an estimate. The cost was very...
Rowe House Development - John E.
A team of 2 spent 5 hours, cleaning top to bottom (removed all light fixture and cleaned.... impressive!!!)
Luzia's Cleaning - Jessica E.
It went very well. I was able to select the color blocks I wanted and where they would be placed in the window. All of the employees were very pleasant and patient. The guys who installed the window arrived promptly, did their job, and there was nothing for me to clean up. The window looks...
Innovate Home Org - Columbus Glass Block - Sarah C.
The initial quoted price from a walk-through seemed high, but we discussed that the quote represented worst case scenario (re-wiring to two floors) and we were excited about the opportunity to have the work done in a timely manner with closing for fire safety reasons, etc. When the job was...
- Robb B.
Charlie recommended a separate fan with new lighting to clear steam from the room better. Several weeks ago I contacted Charlie via email to ask about pricing and scheduling, after one follow up he did reply with cost and said it would be about two weeks before he could do the work. I replied...
Settle Muter Electric
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