Recessed spotlights have an obvious advantage in a bedroom: they free up the ceiling, take no space and never get in the way of a wardrobe door. They also have a formidable drawback — they are installed once and for all. Getting the number or the position wrong is paid for in building work. Here is the calculation for a 12 m² bedroom, and the layout worth keeping.
This guide completes our article on how many lumens for a bedroom.
The answer for 12 m²
Four 300-lumen spotlights for the general light, topped up by two bedside lamps. That is the configuration that works in the vast majority of bedrooms this size.
The reasoning takes three steps. A bedroom needs 100 to 150 lumens per square metre, meaning 1,200 to 1,800 lumens for 12 m². The spotlights should not carry all of it: give them roughly two thirds of the requirement, so 800 to 1,200 lumens. At 300 lumens per spot, that comes to three or four light points. The rest comes from the bedsides, lower down and warmer.
If you would rather think in watts, our article on how many watts for a bedroom gives the full conversion.
Number of spotlights by floor area
| Area | Total needed | Spotlight share | Number of spots |
|---|---|---|---|
| 9 m² | 900 to 1,350 lm | 600 to 900 lm | 2 to 3 |
| 12 m² | 1,200 to 1,800 lm | 800 to 1,200 lm | 3 to 4 |
| 15 m² | 1,500 to 2,250 lm | 1,000 to 1,500 lm | 4 to 5 |
| 20 m² | 2,000 to 3,000 lm | 1,300 to 2,000 lm | 5 to 7 |
These figures assume 300-lumen spotlights, the most common rating. With 400-lumen spots, take one away; with 200-lumen spots, add one or two. Always check the lumen value printed on the packaging, never the wattage.
The layout: the real difficulty
The number is calculated, the position is thought through. Three rules are enough.
Never a spotlight above the head of the bed. This is the most common mistake and the hardest to undo. Lying down, you look at the ceiling: a spot directly overhead shines straight into your eyes. Always shift the light points towards the foot of the bed or to the sides.
Stay at least 60 cm from the walls. Closer, and the spot draws an arc of light on the wall that highlights every paint flaw. Further away, it lights the centre of the room and leaves the edges in shadow.
Space them 1.5 to 2 m apart. For a standard 2.5 m ceiling, that is the distance that gives even light with no pooling. Tighter spacing gives a hotel ceiling; wider leaves hollow zones.
For a 12 m² bedroom, typically 3 m by 4 m, that means four spots in a rectangle, shifted towards the foot of the bed, around 70 cm from the walls and 1.8 m apart.
Beam angle and temperature
Two characteristics decide comfort as much as the number of spots does.
| Setting | For a bedroom | Why |
|---|---|---|
| Beam angle | 36° to 60° | Below that you get pools of light; above it the beam scatters and dazzles |
| Colour temperature | 2,700 K | Warm white accompanies the end of the day; past 3,000 K the bedroom becomes an office |
| Dimmer | Essential | Four spots at full output are too bright for a bedroom in the evening |
| Colour rendering | CRI 80 minimum | Below that, textiles and wood look dull |
The dimmer deserves emphasis. A bedroom is the room where the gap between uses is widest: making the bed calls for light, going to bed calls for the opposite. Without a dimmer, people end up never switching the ceiling on at all. Our guide to the dimmer switch sets out the compatibilities to check before buying.
What spotlights will never do
A ceiling of spotlights, however carefully calculated, produces light that comes only from above. Faces gain hollows, volumes flatten, and the atmosphere stays functional.
That is why the two thirds is not an arbitrary figure. The remaining third, delivered at human height, makes all the difference: two bedside lamps of 200 to 300 lumens, possibly a lamp on a chest of drawers.
The ideal is being able to do without the ceiling entirely late in the evening. A well-thought-out bedroom works in three modes: spots alone for tidying, dimmed spots plus bedsides for getting ready, bedsides alone for reading and falling asleep. Our bedroom lighting reference develops these three layers.
Our lamps for the lower layer
Two cordless lamps with adjustable intensity, taking over from the ceiling at the end of the day without demanding a socket at the bedside.
Belora — Rechargeable touch mushroom lamp
The touch-controlled mushroom lamp: tap the cap to change the intensity and switch between warm, neutral and cool light. Built-in battery, USB cable included.
- Table lamp
- Touch control
- 3 light tones
- Cordless rechargeable
- 8 colours
Aurora — Cordless lamp, 3,000 to 6,000 K
A 20 cm conical iron silhouette: three light temperatures, from warm white (3,000 K) to cool (6,000 K), and three intensities controlled with a touch. USB charging.
- Table lamp
- Cordless
- 3,000 to 6,000 K
- 3 intensities
- Height 20 cm
Frequently asked questions about bedroom spotlights
How many spotlights in a 12 m² bedroom?
Three to four 300-lumen spots for the general light, meaning 800 to 1,200 lumens, topped up by two bedside lamps of 200 to 300 lumens.
What spacing between two spotlights?
1.5 to 2 m for a 2.5 m ceiling, and at least 60 cm between a spot and a wall, to avoid the arc of light on the wall.
Can you put a spotlight above the bed?
It is not advisable. Lying down you look at the ceiling and the spot shines straight into your eyes. Shift them towards the foot of the bed or to the sides.
What colour temperature for bedroom spotlights?
2,700 K. Warm white accompanies the end of the day. Past 3,000 K the light becomes too neutral for a room meant for rest.
Are spotlights enough to light a bedroom?
Technically yes, comfortably no. Light coming only from the ceiling hollows faces and flattens volumes: always add one or two low sources.
Bedroom spotlights, in short
For 12 m²: four 300-lumen spots, spaced 1.5 to 2 m apart, 60 cm from the walls, shifted towards the foot of the bed, at 2,700 K and on a dimmer. Then two bedside lamps for the lower layer. To size the other rooms in the house, open our how many lumens per room reference.
The Lumora tip
Before drilling, mark the positions on the floor with tape and lie down on the bed. You will see straight away which spots would have been in your eyes — and moving them still costs nothing at that stage.
