A kitchen is the only room in the house where the lighting brief genuinely has two answers, and where the obvious solution — a brighter ceiling light — makes one of them worse rather than better.
The general method is in how many lumens a room needs.
The two numbers
General lighting: 30–40 lumens per square foot across the whole floor area. This is so you can move around, find things, and see into the room.
Worktop lighting: 50–100 lumens per square foot across the counter surface only.
By kitchen size:
| Kitchen | General light | Worktop (about 20 % of area) |
|---|---|---|
| 80 sq ft | 2,400–3,200 lm | 800–1,600 lm |
| 100 sq ft | 3,000–4,000 lm | 1,000–2,000 lm |
| 120 sq ft | 3,600–4,800 lm | 1,200–2,400 lm |
| 150 sq ft | 4,500–6,000 lm | 1,500–3,000 lm |
| 180 sq ft | 5,400–7,200 lm | 1,800–3,600 lm |
| 200 sq ft | 6,000–8,000 lm | 2,000–4,000 lm |
The two are additive. A 150 sq ft kitchen wants somewhere around 6,000–9,000 lumens in total, split between the two jobs.
Why the ceiling cannot do the worktop
The counter runs along the wall. The wall cabinets are above it. You stand at the counter facing the wall — which puts your body between the ceiling light and the surface you are working on.
Make the ceiling light brighter and the shadow gets sharper, not weaker. You end up with a bright room and a dark chopping board, and everything else uncomfortably glary.
The geometry only works if the light comes from in front of you, which in a kitchen means from underneath the wall cabinets. Under-cabinet lighting is not a decorative extra; it is the only fitting position that solves the actual problem.
Where there are no wall cabinets — an island, a run under a window — the equivalent is a pendant or a directional fitting positioned so the light arrives at the surface from the room side rather than from directly overhead.
Under-cabinet, practically
Output: roughly 200–300 lumens per linear foot of counter. A 10-foot run wants 2,000–3,000 lumens across it.
Position matters more than output. Mount the fitting toward the front edge of the cabinet underside, not against the wall. Mounted at the back, the light hits the splashback and reflects glare into your eyes; mounted forward, it washes the counter evenly.
Continuous beats spots. A strip or a long linear fitting gives even light along the whole run. Individual pucks give bright circles with dim gaps, and the gaps are always where you are working.
Switch it separately. Under-cabinet light on its own is a pleasant low-level kitchen at night, and it is the setting most people end up using most.
Islands
An island has no cabinet to hide a fitting under, so pendants do the job.
- Height: hang so the bottom of the shade sits roughly 30–36 inches above the counter surface. Higher spreads more but glares; lower is focused but blocks sightlines across the room.
- Number and spacing: two or three over a typical island, spaced evenly with the outer ones set in from the ends rather than at them.
- Shade shape decides everything. An open-bottomed shade puts light on the counter. A diffusing globe lights the room and does comparatively little for the surface. Choose by which job you want it to do.
General lighting layout
For the ambient layer, recessed downlights are the usual answer. Two rules that matter more than the fitting choice:
- Space them at roughly the ceiling height. An 8-foot ceiling wants lights about 4 feet apart in a grid — spacing equal to about half the ceiling height is a common starting point, adjusted for the beam angle of the fitting.
- Keep them off the wall by about half the spacing, and — importantly — position the row over the counter so it sits in front of the cabinet face rather than directly above it. A downlight centred over the cabinet lights the cabinet doors.
Colour temperature, briefly
Kitchens are the room where the warm-versus-cool argument is sharpest, because the room is both a workspace and a living space.
3000 K is the common compromise: warm enough to feel domestic, cool enough that food colours read accurately. 2700 K is cosier and makes greens and whites look slightly duller. 4000 K is crisper for task work and can feel clinical in a kitchen that opens onto a living area.
Whatever you choose, use the same temperature for the general and the under-cabinet layers. Mixing them is the single most common kitchen lighting mistake and it looks wrong immediately.
What this page does not cover
- The general method is in how many lumens a room needs, including the ceiling height and surface colour corrections.
- Dimming and LED compatibility, which matter because a kitchen wants a bright setting and an evening setting.
- Colour rendering, which affects how food looks and is not the same as colour temperature.
- Electrical work, which is a job for a qualified electrician wherever it involves new circuits.
Two numbers, and the second one has to come from in front of you.