KelvinPlanHow much light each room needs, and what colour it should be.

Recessed lights for a 16 × 26 ft kitchen with a 10 ft ceiling

Recessed lights needed
15lights
3 × 5 grid, about 5.3 ft apart in a 16 × 26 ft kitchen
Layoutacross the 16 ft dimension × along the 26 ft dimension3 × 5
Spacing (rule of thumb)half of the 10 ft ceiling5ft
Actual spacing to mark outafter rounding to whole fixtures5.3 × 5.2ft
First light from the wallhalf a spacing — closer washes the wall, further leaves dark corners2.7 × 2.6ft
Room area416ft²
Target light levelgeneral light — counters need task lighting on top35fc
Total lumens needed14,560lm
Lumens per fixtureabout 13 W each in LED971lm
Room width
16 ft
Room length
26 ft
Ceiling height
10 ft
Room
kitchen

The grid

Spacing for recessed cans is ceiling height divided by two. A 10 ft ceiling gives 5 ft, which across a 16 × 26 ft room works out to a 3 × 5 grid — 15 lights.

Rounding to whole fixtures moves the real spacing to 5.3 × 5.2 ft. Mark the ceiling off those numbers, not off the rule of thumb. The first row sits 2.7 ft from the wall — half a spacing. Closer and you get a bright band down the wall; further and the corners go dark.

What to buy, not just how many

416 ft² at 35 footcandles needs 14,560 lumens in the room, which is 971 lumens per fixture — around 13 W in LED.

That is the number to shop by, and it is the one most layout calculators leave out. A 4″ LED downlight typically runs 600–800 lm; a 6″ runs 800–1,200 lm.

Before you cut

Find the joists first. A 3 × 5 grid rarely lands clear of framing on the first attempt, and shifting a can six inches to miss a joist is invisible once the trim is on. Put the whole layout on a dimmer while the wiring is open — it costs almost nothing then and cannot be added cheaply later.

Notes

  • The spacing rule is ceiling height ÷ 2, which gives 5 ft here. Rounding to whole fixtures moves it to 5.3 × 5.2 ft — mark the ceiling off the real numbers, not the rule.
  • 971 lumens per can is the figure to shop by. A 4″ LED downlight typically runs 600–800 lm and a 6″ runs 800–1,200 lm, so either size covers it.
  • Kitchen is a task space. 35 fc is the general level — countertops, desks and mirrors still need their own light. Ceiling cans alone put the light behind you and your own shadow onto the work.
  • Put them on a dimmer. It costs almost nothing at install, and it is the difference between a ceiling that works at dinner and one that works at 11pm.
  • Check the joists before marking. A 3 × 5 grid rarely lands clear of framing on the first try, and moving a can 6 inches to miss a joist is invisible once the trim is on.

Nearby sizes

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