Recessed Lighting Guide: Cost, Layout, Sizing & Installation

Clean aesthetics: Recessed lights (also called can lights, pot lights, or downlights) sit flush with the ceiling. No fixtures hanging down, no bulky surface-mount lights. Creates a clean, modern ceiling line. Works with any décor style.

Versatility: General/ambient lighting (overall room illumination). Task lighting (over counters, desks, or workspaces). Accent lighting (highlighting artwork, architectural features, or focal points). Adjustable-aim (gimbal) trims direct light where you need it.

Space saving: Ideal for rooms with low ceilings (7-8 feet) where pendant lights or chandeliers would feel cramped. Perfect for: basements, hallways, kitchens, bathrooms, closets, and any room where you want light without visible fixtures.

Housing types: New construction (NC): designed for installation before drywall. The housing attaches to the ceiling joists. Used during new construction or major renovation. Remodel (retrofit): designed for installation into an existing ceiling. Spring clips or push bars hold the housing in place through the drywall hole. No joist access required. The standard choice for adding recessed lights to a finished ceiling. IC-rated (Insulation Contact): can be installed in direct contact with insulation. Required when insulation is present above the ceiling (most attic-adjacent ceilings). Always use IC-rated housings unless you're certain there's no insulation. Non-IC: must maintain 3 inches of clearance from insulation.

Sizes: 4-inch: the most popular size for residential use. Provides focused, defined light. Works well for task lighting, accent lighting, and general illumination in most rooms. 6-inch: larger light output per fixture. Good for high ceilings (9+ feet), large rooms, and general ambient lighting. Was the standard for decades but 4-inch is now more common. 3-inch: compact. Good for accent lighting, closets, and tight spaces. 2-inch: very small. Used for accent lighting in display cases, soffits, and architectural details.

LED wafer lights (ultra-thin): A newer type that eliminates the traditional can housing entirely. A thin LED disk mounts directly to the ceiling (through a small junction box). Only 1/2 inch thick (virtually flush with the ceiling). Available in 4-inch and 6-inch sizes. Easier to install in tight spaces (no housing to fit between joists). Cost: $15-$30 each. Brands: Halo, Commercial Electric, Lithonia. Increasingly popular for both new construction and remodel projects.

General spacing rule: Divide the ceiling height by 2 to get the recommended spacing between lights. 8-foot ceiling: 4 feet apart. 9-foot ceiling: 4.5 feet apart. 10-foot ceiling: 5 feet apart. Wall offset: place lights half the spacing distance from the wall. For 4-foot spacing: first row of lights is 2 feet from the wall.

By room: Kitchen: task lighting over counters (24 inches from the wall, spaced 3-4 feet apart along the counter). General lighting in the center of the kitchen (4-foot grid). Over the island: centered over the island, spaced 3-4 feet apart (or use pendant lights instead). Bathroom: over the vanity mirror (centered on the mirror, one per sink). Shower: one recessed light centered in the shower (must be wet-location rated). General: 1-2 additional lights for the rest of the bathroom. Living room: perimeter lighting (2 feet from walls, 4-5 feet apart). This washes the walls with light and makes the room feel larger. Bedroom: avoid placing lights directly over the bed (glaring when lying down). Place along the perimeter and over the closet/dressing area. Hallway: spaced 4-6 feet apart, centered in the hallway. One near each end and evenly between.

How many lights? Rule of thumb: one recessed light per 4-6 square feet of ceiling for general lighting. 10x12 room (120 sq ft): 4-6 lights (4-inch) or 3-4 lights (6-inch). 12x14 room (168 sq ft): 6-8 lights (4-inch). 15x20 room (300 sq ft): 8-12 lights (4-inch). These are starting points — adjust based on natural light, wall color (dark walls absorb more light), and personal preference. Dimmers let you adjust brightness, so slightly more lights than needed (on a dimmer) gives you the most flexibility.

LED (the clear winner): Energy use: 8-15 watts per fixture (vs 65-100 watts for incandescent). Lifespan: 25,000-50,000 hours (vs 1,000-2,000 for incandescent). That's 10-25 years at 5 hours/day. No heat: LEDs run cool (important for recessed cans in insulated ceilings). Instant on: full brightness immediately (no warm-up). Color temperature options: warm white (2700K — like incandescent, cozy), soft white (3000K — slightly brighter, the most popular for homes), bright white (3500-4000K — kitchens, bathrooms, workspaces), daylight (5000K+ — very bright, garage/workshop). Dimmable: most LED recessed lights are dimmable, but you MUST use a compatible LED dimmer switch (Lutron Caseta, Lutron Diva, or similar). Standard dimmers cause flickering and buzzing with LEDs.

Cost per fixture: LED integrated wafer: $10-$25 each (the bulb and fixture are one unit). LED retrofit kit (drops into existing can): $8-$20 each. LED bulb (for existing housings): $3-$8 each. Incandescent or halogen bulb: $2-$5 each (but uses 5-10x more electricity).

Recommendation: LED is the only sensible choice for new installations. For existing incandescent recessed lights, swap to LED retrofit kits ($8-$20 each) — it's one of the easiest and highest-ROI upgrades you can make.

Cost per light (installed by an electrician): New construction: $50-$100 per light (easier install, open ceiling). Remodel/retrofit: $100-$200 per light (cutting holes, fishing wire). LED wafer light (remodel): $75-$150 per light.

Total project cost (typical): Kitchen (6-8 lights): $600-$1,600. Living room (6-10 lights): $600-$2,000. Bedroom (4-6 lights): $400-$1,200. Bathroom (3-4 lights): $300-$800. Whole house (20-30 lights): $2,000-$6,000.

DIY considerations: Electrical work requires a permit in most jurisdictions. If you're comfortable with basic electrical work and your local code allows homeowner electrical work: LED wafer lights are the easiest to install (no housing to wrestle between joists). Remodel housings (with spring clips) are straightforward. New construction housings require open ceiling access. Always turn off the circuit at the breaker before working. Use a stud finder and voltage tester. If in doubt, hire an electrician. A bad wiring connection in an enclosed ceiling space is a fire risk.

Dimmer switches: Always install dimmer switches with recessed lighting. Budget: $15-$30 per switch. Smart dimmer (Lutron Caseta, recommended): $50-$65. A dimmer gives you control over brightness and ambiance. Recessed lighting on a dimmer transforms the feel of a room (bright for tasks, dim for relaxing).