Small bathroom lighting: how to make a small bathroom feel bigger
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Mike's quick answer
Use two to four IP65 downlights spread towards the corners, a mirror lit down both sides, and a warm strip under a wall-hung vanity. Allow about 300 lumens per square metre from the ceiling, keep everything flush to the ceiling, and use 3000K overhead with 3000K or 4000K at the mirror.
A small bathroom shows every lighting mistake. One light in the middle of the ceiling leaves the corners dark and puts shadows on your face at the mirror, and the room feels even smaller than it is.
Lighting can’t add floor space, but it changes how big a room feels more than almost anything else you can do without a builder. Even light that reaches the corners and walls, a well-lit mirror and a soft glow at floor level all push the walls back. What decides the details is the ceiling depth, whether the vanity is wall-hung, and how much wall you have around the mirror.
What works in a small bathroom
The same three layers as any bathroom, scaled down. Flush ceiling lights give the general light without eating headroom. Lights at the mirror, ideally down both sides, light your face and draw the eye upward. A strip of light low down, usually under a wall-hung vanity, adds depth and makes the floor look bigger.
You don’t need all three. If the budget only stretches to two, choose good ceiling lights and a well-lit mirror. Put each layer on its own switch so you can use the mirror light and the strip at night without the full ceiling lights.
Ceiling lights for a small bathroom
Recessed downlights are the best fit. They sit flush, take up no visual space and spread light evenly if you place them well. Choose IP65 so you don’t need to work out which zone each one is in; in a small bathroom almost every ceiling position is near the shower or bath anyway. A beam of around 60 degrees spreads light more evenly than a narrow one; beams under 40 degrees make bright pools with darker gaps between, which makes a small room feel choppy.
For the number, allow about 300 lumens per square metre of floor from the ceiling. With fittings of 400 to 500 lumens, that works out like this:
| Floor area | Lumens from the ceiling | Downlights | |
|---|---|---|---|
| 1.5 × 1.5 m | 2.25 m² | About 700 | 2 |
| 2 × 1.5 m | 3 m² | About 900 | 2 to 3 |
| 2 × 2 m | 4 m² | About 1,200 | 3 to 4 |
Small rooms with white tiles bounce a lot of light around, so the lower number is often enough. With dark tiles, add one. If the downlights are on a dimmer, it’s better to have slightly too much light than too little.
Spread them towards the corners rather than grouping them in the middle, and put one over the shower: a dark shower makes a small room feel enclosed. In a rectangular room, a staggered line often covers better than a neat pair. Avoid a downlight directly over where you stand at the basin, which shadows your face. The downlight spacing calculator works out a layout for your exact room.
If the ceiling is too shallow for downlights, a flush IP44 light with an opal diffuser is the alternative; about 30 cm across suits most small bathrooms. The bathroom ceiling lighting guide covers flush lights, spots and depths in more detail.
Mirror lighting that opens up the room
The mirror does two jobs in a small bathroom: it lights your face, and it makes the room look bigger. Light down both sides is best for both. It fills the shadows on your face, and the vertical lines of light draw the eye upward so the ceiling feels higher.
An LED mirror with lit bands down the sides is the neatest answer, because the mirror and light take up only one patch of wall. Slim vertical wall lights either side of a mirror you already have work just as well, with the centre of each at about eye height, 150 to 160 cm from the floor. A halo mirror lit only from behind looks lovely but puts little light on your face, so pair it with something else. The bathroom mirror lighting guide covers heights and options.
Go as big with the mirror as the wall allows. A large mirror bounces light back into the room and doubles the view of it; one that runs most of the width of the basin wall makes a bigger difference to a small room than any light fitting.
Accent lighting adds depth
A strip of light under a wall-hung vanity is the single most effective trick in a small bathroom. The unit seems to float, you see more floor, and the room feels wider. Fit the strip towards the back of the underside so you see the glow on the floor rather than the strip itself, and use warm white, 2700K or 3000K.
A lit shower niche is the other good spot, adding a soft glow to the darkest corner of the room. Use IP65 strip under a vanity and IP67 or higher in a niche that the shower hits, in an aluminium profile with a diffuser. Run it on 12 or 24 V with the driver outside zones 0, 1 and 2, wired from the lighting circuit. Don’t plan on a plug-in strip: ordinary sockets aren’t allowed within 2.5 m of the edge of the bath or shower, which rules them out of almost every small bathroom. The bathroom LED strip guide has the details.
Keep accents to one or two. More than that and a small room looks busy. And skip coloured RGB strip: warm white makes a small bathroom feel calmer and bigger.
Colour temperature
Warm white, around 3000K, suits the ceiling lights and the accent strip in a small bathroom. It’s comfortable and keeps a tiled room from looking clinical. Cool white above 4000K makes a small, shiny room feel harsh.
At the mirror, 3000K is flattering and 4000K is better for judging skin and make-up. Using 3000K overhead and 4000K at the mirror works well; the difference is slight once both are on. Whichever you choose, CRI 90 or above matters more than the exact colour.
Mistakes that make a small bathroom feel smaller
- A pendant or hanging light. Anything that drops below the ceiling lowers it visually. Keep to recessed or flush fittings.
- Too little light. Dim rooms feel smaller. Allow about 300 lumens per square metre from the ceiling, plus the mirror light.
- Dark corners. Downlights bunched in the middle leave the edges dim, and dim edges shrink a room.
- Light only from above. Downlights alone look flat. Light at the mirror and low down adds depth.
- Narrow beams. Spotlit pools with gaps between them make a small room look patchy.
- A small mirror. It’s the cheapest way to make the room look bigger, so use the biggest one the wall takes.
Layouts for small bathrooms
Compact ensuite, under 3 m². Two IP65 downlights, one over the shower and one over the basin side, an LED mirror lit down the sides, and a strip under the vanity if it’s wall-hung. That’s everything you need.
Narrow galley bathroom. Two or three downlights in a line along the length, offset slightly towards the basin side rather than down the exact centre. Vertical lights at the mirror suit the tall, narrow proportions, and a lit niche at the far end draws the eye through the room.
Small square bathroom. Three downlights in a triangle, one over the shower or bath, one over the basin area and one by the door, plus mirror lighting. A square room takes wall lights more easily than a narrow one.
Bathroom with no window. Daylight-free rooms feel smallest of all, so the low-level strip and a well-lit mirror matter even more. Put the strip on its own switch so the room never feels like a dark box at night. On a top floor, a sun tube can bring daylight through the roof; it’s worth asking about during a renovation.
Daylight
If the bathroom has a window, keep it clear. Frosted or reeded glass or a light voile keeps privacy without blocking the light the way a heavy blind does. A mirror on the wall next to or opposite the window bounces daylight further into the room.
Dimming and switching
Put the ceiling lights on a dimmer if you can, with a trailing-edge dimmer made for LED loads, and check the downlights are dimmable. The switch or dimmer goes outside the door, or the lights run from a pull cord: ordinary switches can’t go in the zones around the bath and shower, and in a small bathroom there’s rarely anywhere outside them. The mirror light and the accent strip are best on their own switches, or the mirror’s built-in switch.
A new circuit, or new wiring within the zones around the bath or shower, is notifiable under Part P in England, and in a small bathroom much of the room is within the zones, so use a registered electrician. For the zones and ratings in full, see bathroom zones and IP ratings explained, and for the whole room, bathroom lighting ideas.
What I'd buy
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What is the best lighting for a small bathroom?
Two to four IP65 downlights spread towards the corners, a mirror lit down both sides, and a warm strip under a wall-hung vanity. If the ceiling is too shallow for downlights, use an IP44 flush light with an opal diffuser.
How many downlights does a small bathroom need?
About 300 lumens per square metre: two downlights in a 1.5 × 1.5 m room, two or three in a 2 × 1.5 m room, and three or four in a 2 × 2 m room, at 400 to 500 lumens each.
Do LED lights make a bathroom look bigger?
The right layout does. Even light that reaches the corners, vertical light at the mirror and a glow at floor level all make a small bathroom feel more spacious. A single central light does the opposite.
Should I use warm or cool light in a small bathroom?
Warm white, around 3000K, for the ceiling and accent lights. At the mirror, 3000K or 4000K, with CRI 90 or above.
Can I have a pendant light in a small bathroom?
It’s rarely worth it. A pendant lowers the ceiling visually, and if it hangs within 2.25 m of the floor over the bath or shower, it’s in zone 1 and needs an IPX4 rating approved for that zone. Recessed or flush fittings suit a small room better.
How do I light a small bathroom with no window?
Use the full three layers: downlights, a well-lit mirror and a low-level strip on its own switch. The strip stops a windowless room feeling like a box at night.
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