A kitchen lit by a single ceiling fixture always looks dim even when the bulb is rated for 100 watts — because the corners and counters fall into shadow no matter what goes in the center of the room. Kitchen can lights, properly laid out, solve that problem by distributing light in a grid that eliminates shadows, illuminates every counter, and separates the kitchen from the adjacent dining or living area. Done well, they are the single biggest improvement to kitchen function and feel short of a full remodel.
Part of our Kitchen Remodeling guide — explore the full guide →
Old Cans vs Modern LED Wafers
Traditional recessed cans are 6-inch deep metal housings wired to a ceiling joist and fitted with an incandescent or CFL bulb. Modern LED “wafer” lights ditch the housing entirely — a 1-inch thick LED panel with an integrated driver clips into the hole and connects via a small junction box. Wafers install in 10-15 minutes each, work in shallow ceilings with ductwork above, and cost $12-$25 per fixture.
For new construction and major remodels, some electricians still prefer real housings for easier maintenance. For retrofits and most DIY projects, LED wafers win every round.
How Many Cans Your Kitchen Needs
General rule: one 4-inch or 6-inch LED can per 16-20 sq ft of kitchen floor space. A 10×12 foot kitchen (120 sq ft) wants six to eight cans. A 12×15 kitchen (180 sq ft) wants 9-12. Adjust upward for dark cabinets and countertops (which absorb light) or downward for a very white space.
- Small kitchen (80-120 sq ft): 5-7 cans
- Standard kitchen (120-180 sq ft): 7-10 cans
- Large kitchen (180-250 sq ft): 10-14 cans
- Open-plan kitchen over 250 sq ft: Mix cans and pendants; plan a grid and an accent layer
Spacing and Layout Rules
Space cans 3.5-5 feet on center for even coverage in a standard 8-9 foot ceiling. Drop the spacing to 3-4 feet for 10-foot ceilings because the light spread narrows at that height. Place the outer row 18-24 inches off each wall so light hits the counter edges, not just the floor. A perimeter row over the countertops plus a central row over the island or main walking path gives the cleanest illumination.
Use a sketch on graph paper before drilling a single hole. Mark island dimensions, sink location, range hood, and cabinet soffits. Then lay out can positions to avoid framing members and ductwork; a little planning saves an afternoon of patching drywall.
Bulb Size, Color Temperature, and Lumens
4-inch cans look tidy in ceilings up to 9 feet and suit kitchens with a cleaner, modern feel. 6-inch cans throw more light and work well in large kitchens with 10-foot-plus ceilings. Choose lumens per fixture based on ceiling height: 600-900 lumens for 8-9 foot ceilings, 900-1,200 lumens for 10-foot ceilings, and 1,200-1,500 for vaulted or cathedral spaces.
Color temperature drives the mood. 2700K reads warm and yellow — more like incandescent. 3000K is the sweet spot for most kitchens; it renders food colors accurately without looking too clinical. 3500K-4000K is crisper and more energetic, good for high-task kitchens. 5000K is daylight-bright but often feels sterile in a home setting.
CRI Matters for Food
Color Rendering Index (CRI) measures how accurately a light source shows true colors. For a kitchen, insist on CRI 90 or higher. Below 90, red meat looks gray, vegetables look dull, and plated food looks unappetizing. Almost every mid-range LED wafer ships at CRI 90 now; reject any fixture that does not list a CRI value.
Dimmer Compatibility
LED cans need a dimmer rated for LED or an LED+incandescent compatible dimmer — an older legacy triac dimmer for incandescent will flicker, buzz, or have a narrow dim range. Lutron Caseta, Leviton Decora Smart, and Lutron Diva LED+ are reliable picks. Smart dimmers add app control and scene presets (“cook,” “dine,” “clean-up”) that transform how a kitchen functions at different times of day.
Installation Basics
- Kill power at the breaker and verify with a non-contact tester.
- Mark each can location. Use the manufacturer’s template to trace the cut.
- Drill a pilot and check for framing and ducts using a flexible borescope or camera.
- Cut the hole with a drywall saw or oscillating tool.
- Pull NM-B 14/2 cable from the nearest switched circuit to each fixture. Leave 6 inches of tail.
- Wire the junction box at each fixture per the manufacturer’s diagram.
- Clip the wafer into the hole — spring clips hold tight to the drywall.
- Restore power, test the dimmer, and verify all cans light at all dimming levels.
Most jurisdictions require a permit for new circuits and for any wiring modifications in a kitchen. Replacing existing cans in a like-for-like retrofit usually does not require a permit but always check local code.
Common Mistakes to Avoid
- Centering a can directly over the sink: Your shadow falls on the dishes — shift forward 12 inches
- Too few cans for the square footage: Counters end up in shadow
- Mixing color temperatures: 2700K wafers beside 4000K wafers looks broken
- Ignoring dimmer compatibility: Leads to flicker, buzz, and dim-range limits
- Running cans on the same circuit as the disposal or microwave: Voltage drops cause noticeable dimming every time an appliance kicks on
Layered Lighting Beats Cans Alone
Recessed cans handle general illumination, but a kitchen needs three layers for the best result. Add under-cabinet LED tape (2-4 watts per foot at 3000K) for task lighting on the counter. Add a pendant or small chandelier over the island to create a focal point and separate the cooking zone from the rest of the room. The three layers on independent dimmers let you cook at full brightness, dine at 30 percent, and clean up somewhere in between — all from the same room.
