20×30 room:
how many lights?
15–48fixtures A 20×30 ft room is 600 square feet. How many lights it needs depends entirely on what happens in it — a kitchen is lit to roughly twice the level of a bedroom, so the same footprint ranges from 15 to 48 fixtures at 800 lumens each.
The footprint does not decide the count. The target illuminance does, and that is set by what the room is for.
SOURCE·IES lumen-method recommendations·published recommendations, quoted as ranges·REVIEWED JUL 2026
Plan above: the 20×30 ft footprint laid out as a living room at 150 lux, with iso-lux contours at 32 / 21 / 11 lux.
Schedule · by useOne 20×30 footprint, twelve commissioning targets
| Room type | Target | Total lumens | Fixtures | Grid | Spacing |
|---|---|---|---|---|---|
| Kitchen | 300 lx | 29,433 lm | 40 | 8 × 5 | 3.8′ × 4′ |
| Living room | 150 lx | 16,857 lm | 24 | 6 × 4 | 5′ × 5′ |
| Bedroom | 100 lx | 11,238 lm | 15 | 5 × 3 | 6′ × 6.7′ |
| Bathroom | 200 lx | 22,477 lm | 28 | 7 × 4 | 4.3′ × 5′ |
| Home office | 300 lx | 30,150 lm | 40 | 8 × 5 | 3.8′ × 4′ |
| Dining room | 150 lx | 15,075 lm | 20 | 5 × 4 | 6′ × 5′ |
| Garage | 150 lx | 16,857 lm | 24 | 6 × 4 | 5′ × 5′ |
| Hallway | 100 lx | 11,238 lm | 15 | 5 × 3 | 6′ × 6.7′ |
| Laundry | 200 lx | 19,622 lm | 24 | 6 × 4 | 5′ × 5′ |
| Basement | 150 lx | 16,857 lm | 24 | 6 × 4 | 5′ × 5′ |
| Workshop | 400 lx | 39,244 lm | 48 | 8 × 6 | 3.8′ × 3.3′ |
| Nursery | 100 lx | 11,238 lm | 15 | 5 × 3 | 6′ × 6.7′ |
At 800 lumens per fixture and an 8 ft ceiling. Open a room type for other fitting outputs, other ceilings and its own contour sheet.
SOURCE·IES lumen-method recommendations·published recommendations, quoted as ranges·REVIEWED JUL 2026
QueriesWhat this footprint is usually asked
How many recessed lights for a 20x30 room?
It depends what the room is for. A 20×30 ft (600 sq ft) living room needs about 24 fixtures at 800 lm; the same footprint as a kitchen needs about 40, because a kitchen is lit to roughly double the level. Pick the room type for the real answer.
How many square feet is a 20x30 room?
600 square feet, or 55.7 square metres.
