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A staircase with a low wall light for every step and a line under the handrail, with no ceiling spots (AI-generated illustration)

Corridors & Stairs lighting: The complete guide

Q: How many watts do I need for a corridor?

Usually 6 – 10 W per fixture is enough in ordinary corridors, because a corridor needs only around 100 lux. More powerful fixtures dazzle without adding beauty.

Q: What is the best lighting for stairs?

Low-level wall lighting or a strip under the steps, because it lights the tread from the side without body shadows and without glare in the eyes.

Q: Why does my corridor look narrow?

Because the light falls only on the floor and the walls are dark. Lighting both walls widens the corridor visually.

A long corridor with a row of spotlights lighting only the floor looks narrow and tunnel-like. Corridors feel wider when their walls are lit, and stairs need light that defines each step without dazzling the person coming down.

8 sections52 related entriesReviewed under Eng. Abdullah Al Balushi

Recommended values

LightingAround 100 lux

StairsA clearly visible edge on every step

Colour temperatureMatched to the adjoining spaces

FittingsDouble washer, low wall light, strip under the handrail

Guide values; the final design depends on the space, its colours and its use.

The most common mistake: a row of spotlights down the middle of the corridor

The usual approach is a row of spotlights along the centre of the corridor ceiling, each one drawing a pool on the floor. The result is a corridor that feels narrow and tunnel-like, with alternating bright and dark patches that tire the eyes, and dark walls that make it look narrower than it is. Fixtures are often more powerful than needed, so the light dazzles whoever walks through.

Light the walls, not the floor

A fixture that washes both walls at once (Double Washlight), or asymmetric fixtures aimed at the walls, visually widens the corridor and prevents glare.
Wall lights that light the ceiling (Up-light) give calm reflected light, and suit corridors with light-coloured ceilings.
Paintings and niches along the corridor are an opportunity for accent lighting that breaks up its length and gives it rhythm.
A corridor needs little light, around 100 lux; 6 – 10 W fixtures are usually more suitable than the 20 W ones designed for high-ceilinged halls.

Spacing and uniformity

A useful rule of thumb from design guides: the distance between fixtures should not exceed roughly the clear ceiling height, so that no dark patches appear between the pools of light. The narrower the beam angle, the closer together the fixtures need to be. In long corridors, it helps to begin and end the layout with a lit element, such as a painting or a wall at the end of the corridor, because the eye goes to the end of the corridor first.

Stairs: light from the side

Lighting a staircase from the ceiling hits the steps from above, so the body of someone going down casts a shadow on the very tread they are about to step on, and the edge of each step becomes harder to see. Going up, people look straight into the fixture. The most important solution, for both safety and beauty, is low-level lighting.

Small recessed wall fixtures (Step Lights) at about 30 cm above the tread, on every step or every second step.
Or a concealed strip under the nosing of each step, or under the handrail, clearly drawing the line of the steps.
If ceiling lighting cannot be avoided, use a very narrow beam that reaches the floor, kept away from the line of sight when going down.
Low-level fixtures are within children's reach: choose fixtures whose surface does not get hot, with shielding that prevents glare in the eyes of anyone coming up.

Night lighting and sensors

A motion sensor that switches on dim lighting in corridors at night and turns it off after a few minutes.
A very low night level for stairs and corridors leading to bedrooms, instead of full lighting that dazzles eyes adjusted to the dark.
The corridor's colour temperature should match the adjoining spaces, so the colour of the light does not change when moving between rooms.

Checklist before first fix

Small wall boxes for the stairs at a consistent height before plastering and cladding; this cannot easily be added later.
A power feed for a strip under the handrail or the steps, if chosen.
Motion sensor points at the beginning and end of corridors.
Two-way switches at the top and bottom of the stairs.

How to build the layers

A Wall Washer or a fitting that washes both walls at once (Double Washlight) instead of spotlights along the corridor’s axis.
Low wall lights at around 30 cm for the stairs, or a strip under each step or the handrail.
Avoid fittings that are directly visible from the top of the stairs when coming down.
A motion sensor for night-time corridors with soft lighting.
Low wall fittings are within reach of children’s hands, so choose fittings whose surface doesn’t get hot.
Corridors need only a little light, and can be lit indirectly with wall fittings that light the ceiling.

Common mistakes: Corridors

Common mistakeAiming light at glass and mirrors

“Got a spotlight hitting the windows at night? You're blinding your guests!”

The problem: Aiming lights at reflective surfaces such as glass creates distracting glare that blocks the view outside.
Technical explanation: Light should be aimed at walkways and opaque walls. Avoid aiming lights at windows at night entirely, so you can enjoy the view of the garden.
The result: A comfortable evening sitting and a clear view of the villa's garden without distraction.

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