432 sq ft
18×24 room:
18×24 room:
how many lights?
A 18×24 ft room is 432 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 12 to 36 fixtures at 800 lumens each.
Pick the room type below for the full layout, spacing and ceiling plan.
A 18×24 room, by what it is used for
| Room type | Target | Total lumens | Fixtures | Grid | Spacing |
|---|---|---|---|---|---|
| Kitchen | 300 lx | 22,035 lm | 30 | 6 × 5 | 4′ × 3.6′ |
| Living room | 150 lx | 12,848 lm | 16 | 4 × 4 | 6′ × 4.5′ |
| Bedroom | 100 lx | 8,565 lm | 12 | 4 × 3 | 6′ × 6′ |
| Bathroom | 200 lx | 17,130 lm | 20 | 5 × 4 | 4.8′ × 4.5′ |
| Home office | 300 lx | 22,706 lm | 30 | 6 × 5 | 4′ × 3.6′ |
| Dining room | 150 lx | 11,353 lm | 15 | 5 × 3 | 4.8′ × 6′ |
| Garage | 150 lx | 12,848 lm | 16 | 4 × 4 | 6′ × 4.5′ |
| Hallway | 100 lx | 8,565 lm | 12 | 4 × 3 | 6′ × 6′ |
| Laundry | 200 lx | 14,690 lm | 20 | 5 × 4 | 4.8′ × 4.5′ |
| Basement | 150 lx | 12,848 lm | 16 | 4 × 4 | 6′ × 4.5′ |
| Workshop | 400 lx | 29,379 lm | 36 | 6 × 6 | 4′ × 3′ |
| Nursery | 100 lx | 8,565 lm | 12 | 4 × 3 | 6′ × 6′ |
At 800 lumens per fixture and an 8 ft ceiling. Click a room type for other fixture sizes and ceiling heights.
Questions
How many recessed lights for a 18x24 room?
It depends what the room is for. A 18×24 ft (432 sq ft) living room needs about 16 fixtures at 800 lm; the same footprint as a kitchen needs about 30, because a kitchen is lit to roughly double the level. Pick the room type for the real answer.
How many square feet is a 18x24 room?
432 square feet, or 40.1 square metres.