How to Buy Recessed Lights

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recessed ceiling light

The Spruce / Krystal Slagle

Before you decide to add a recessed light, also known as a can light, or decide which recessed or can light to install, there are a few things to consider: What do you want to light? Do you want a pool of light or a tight spot? What size fixture do you want? What kind of light bulb do you want to use? Do you need to use a remodel fixture, or can you install a new-construction housing? What about getting the necessary wiring to your new light? Will you need an IC (Insulation Compatible) or AT (Air Tight) fixture or one that is both?

The Parts of a Recessed Light

  • Housing: Some recessed fixtures are all one piece, but most are made as two pieces. In a two-piece fixture, the housing is the piece that is mounted to the ceiling.
  • Trim is inserted into the housing. Depending on the type of housing and trim you choose, you may have to remove the trim to install the light bulb.
  • Wattage: Every electric lighting fixture is rated for the maximum wattage of the incandescent light bulb or bulbs that you can safely use in it.
  • Frame: Recessed fixtures that are made for installing into open framing have a mounting frame that is attached to the framing members in your ceiling—the joists—to secure them in place.
Recessed light fixture with parts exposed on wooden floor

The Spruce / Margot Cavin

Before You Buy Recessed Lighting

There are several factors to take into consideration before you buy recessed lighting for your home. Figuring out which room you want to put this type of lighting in is just the first step. Size, style, how many, wattage, and placement are just a few others. Recessed lighting will not only change the look of the room but can provide cost-effective energy savings and bring added value to your home, too. 

Buying Considerations for Recessed Lighting

What Do You Want to Light?

Recessed light fixtures are very versatile. They can be used to provide general lighting, task lighting, or accent lighting.

If you want more light to read by, or on your kitchen counter, you probably want a downlight. The same is true for lighting a hallway or corridor, or for the general lighting in a large room such as your family room. To light up that sculpture on your mantel, you'll probably want an eyeball spot. On the other hand, to highlight a large painting or poster, or to subtly light your stereo components, a wall washer trim may be what you need.

Types of Recessed Lighting

The Spruce

What Size Fixture Do You Want?

The common sizes for residential recessed light fixtures are 3 inches through 7 inches in diameter. One way to answer this question is by considering how far the ceiling is from where you want the light, and how big an area you want to light. In an 8-foot ceiling, a 4-inch fixture can work well to provide kitchen countertop lighting. A 6-inch downlight at that height will illuminate your breakfast table nicely. In a 10-foot ceiling, you might want 4-inch fixtures for area lighting, since the light will spread out more. A 7-inch fixture makes a nice wall washer in an 8-foot ceiling.

The most popular size is a 6-inch fixture. For that reason, there are more different styles of trim available for 6-inch fixtures than the other sizes, giving you greater flexibility in choosing the trim you want. 

What Kind of Light Bulb Do You Want to Use?

A recessed fixture with a medium screw base lamp holder can take an incandescent, fluorescent, halogen, or LED light bulb. There are also fixtures available with special lamp holders, or sockets, that can only take certain light bulbs, usually fluorescent or halogen.

If you like the savings, long life, and temperature coolness of fluorescent lamps, but you also like the color warmth of the incandescent light, you can buy fluorescent lamps with a low Kelvin value. For high-intensity light, especially in a small area, halogen often works best. For warm, general lighting, most people prefer incandescent lamps. LED light bulbs can combine several of these characteristics.

If you want to be able to dim your recessed lights or control them with a remote or automated system, choose fixtures you can use incandescent, halogen, or LED light bulbs in. Fluorescent light bulbs are not dimmable unless they have a dimmable ballast.


A recent addition to the recessed lighting market is the new Wafer LED recessed light. It has no housing and is therefore extremely thin. It can be used in new construction projects or on remodels.

Types of Recessed Lighting

Trim Type

The trim is the outside portion that can be seen of the recessed lighting fixture. There are many trim types including adjustable, baffle, pinhole, slotted, decorative, shower, and open. The adjustable trim style is great for accent lighting or illuminating cabinet shelves. An open light trim is a perfect choice for lighting up a large space, such as a kitchen or living area, while the shower is the optimal selection for the bathroom shower area, as it's made to be moisture resistant. 

Light Bulb Type and Temperature

In looking at these light fixtures, you will notice that some bulbs have a screw-in or pin base. There are different types such as incandescent, halogen, LED, or a standard bulb. The LED light bulbs are cool to the touch and also are considered the better choice for cost-effective energy savings. You also need to select the temperature or color of the lighting that you prefer in your home—bright, soft, or daylight. You can put in dimmer switches to lower the level of lighting, too; just keep that in mind when purchasing dimmable bulbs.

Remodel Fixtures vs. New-Construction Housings

Recessed lights are made with two different means of support. The housing for a remodel fixture is typically supported by pushing metal clips through the housing onto the top of the ceiling—the drywall or plaster. New-construction fixtures are supported by screwing or nailing the fixture's frame to the ceiling joists. If you can't get above the ceiling to run the wiring, you will probably have to use a remodel fixture. But if you have access to space above the ceiling where the fixture will be located, you can install new-construction recessed lights in your existing ceiling. The pluses of doing this include that new-construction fixtures are usually less expensive and have a larger selection of trims than remodel fixtures do.


Click Play to Learn How to Convert a Ceiling Light to a Recessed Light

Wiring Type

Remember to bore a hole in the center of each joist if you need to feed wire from one joist bay to another. Remember, also, that the connections for recessed lights are made in a junction box attached to the fixture. If you are using Type NM (Romex) wiring, look for fixtures that have built-in Type NM clamps in their junction boxes. If you are using Type MC cable, get fixtures that have that clamp built-in. It will save you an incredible amount of time.

Wires and junction box pulled out of hole from recessed light

The Spruce / Margot Cavin


Recessed lights will vary in cost depending on the size, features, quality, and type. At large home improvement retailers, the prices for individual fixtures start at around $8 and can go up to as high as $50. Multipacks for recessed lighting are available in packs of four, six, or eight at a discounted rate. LED lighting fixtures are typically higher in cost but will ultimately save money due to the overall cost savings in energy they provide. 

Some homeowners feel comfortable installing these lights themselves but if you don't, be safe and contact an electrician to do the work for you. Hiring a professional to install the recessed lighting for you will increase the price exponentially. But this price can also change, depending on if they run into issues with wiring, adding dimmer switches, etc. 

How to Choose Recessed Lighting

There are numerous choices available when selecting the right recessed lighting for you and your home. From what fits best in the style of your home and your taste, to the logistics of the lights themselves. To help you decide, here are just a few of the questions you should answer before purchasing:

Do you need an insulation-compatible or air-tight fixture?

Many recessed lighting fixtures are made to be Insulation Compatible (IC). That means the housing can be installed in direct contact with insulation. If you're planning to add recessed lights in an insulated ceiling, you should only buy fixtures with housings that are IC rated. Otherwise, you will have to buy or build a cover to keep the insulation away from them.

If a recessed lighting fixture isn't rated to be Air Tight (AT), installing it creates a chimney for your wintertime heating to escape through. This may not be an issue if there's more of your living space above it, but it's very important if that space is your unfinished attic.

Any recessed lighting fixture that will be housed in an unfinished, insulated attic needs to be both IC and AT rated. The good news is that most styles of recessed fixtures are available with either or both ratings.

Will you need a new or upgraded lighting circuit?

When you're installing hard-wired lighting fixtures, which is what recessed fixtures are, the maximum number of fixtures on a circuit is determined by the maximum wattage rating of the fixtures. The wattage of the light bulbs you're planning to use is not part of the calculation. For this reason, especially if you're installing several fixtures at once, you should look for fixtures that have the lowest maximum wattage rating that is high enough to let you use the bulbs you want.​

Where to Shop

While you might find it more comfortable to go into a store so you can see the lighting in person, there are plenty of online retailers to shop, as well. Some of our favorites include:

  • How many recessed lights do I need to put in a kitchen?

    If your kitchen is large, you should estimate your ceiling footage and install a recessed light every 4 to 6 feet for the best and most consistent lighting coverage. 

  • How far away from the wall should recessed lighting be placed?

    To keep shadows away from corners and off the wall, recessed lighting should be placed about 2 to 3 feet from the walls.

  • What is the most common size for recessed lighting?

    Recessed lighting sizes are determined by the housing's inside diameter. Common sizes for use in households are 4-inch, 5-inch, 6-inch, and 7-inch.