Guide · Dark rooms

How to get natural light into a north-facing room

North-facing rooms get no direct sun for half the year, so they stay flat and grey even at noon. You can make a dark room feel brighter with paint and mirrors - but to add actual daylight, you have to bring the sun to the room. Here's the honest run-down of every option.

In short: first uncover and spread the daylight you already have: a clear window, pale surfaces, a well-placed mirror. Real sunlight reaches a room the sun misses in only three ways: a bigger window, a skylight or light tube, or a mirror outside that follows the sun and redirects its light through your existing window.

Why north-facing rooms stay dark

In the northern hemisphere the sun travels across the southern sky, so a north-facing window only ever receives soft, indirect light. Tall buildings, trees or a deep floor plan make it worse. No amount of artificial lighting replaces the warmth and the biological quality of real daylight - it just adds more lamps.

The options, from cheapest to most effective

1. Clear the window (free)

A lot of light is lost before it ever reaches the room. Swap heavy curtains for pale, sheer fabric or open them fully during the day, clear the windowsill and clean the glass. Outside, check hedges, shrubs and branches in front of the window: cutting them back often makes a noticeable difference.

2. Lighten the room (free-cheap)

Pale, matte wall paint, a large mirror opposite the window, light flooring and minimal window dressing all help the existing daylight go further. This is the right first step - but it only redistributes the little light you already have.

3. Pass light through (minor to structural)

If the dark room sits behind a brighter one, such as a hallway behind the living room, light can be passed through: a door with a glass panel, a transom window above the door, or a glass section in a non-load-bearing wall. In a rented home this needs your landlord's consent. Low furniture in front of the window and open shelving keep the light's path clear.

4. Light shelves and light-redirecting louvres (only with sun on the window)

A light shelf is a horizontal reflector above eye level at the window; light-redirecting louvres sit in or in front of it. Both bounce incoming sunlight onto the ceiling and so deeper into the room. That only works if the window itself gets direct sun, so they do little for a north-facing room. More in our comparison of daylighting options.

5. Bigger or new windows (expensive, structural)

Enlarging a window or adding one helps, but it's costly, needs permits, and on a north wall still only collects indirect light.

6. Skylights and light tubes (moderate, fixed)

A roof skylight or a tubular "sun tunnel" pipes daylight down from the roof. Effective for top-floor rooms - but they require building work, can't be aimed or switched off, and do little when the sun is low in winter. (See our heliostat vs. tubular skylight comparison.)

7. Daylight lamps as a supplement

LEDs with a daylight-like colour make a room brighter and work well as task light. They are still a lamp, though: constant, without the course of the day and far weaker than real sun. More on this: why "daylight" LED bulbs aren't real daylight.

8. A sun-tracking heliostat (active, retrofittable)

A heliostat is the only option here that brings direct, real sunlight into a room the sun doesn't reach. Mounted outside, it follows the sun and redirects steady sunlight through your existing window onto a wall, the floor or a desk - and it keeps following as the seasons change.

What a heliostat actually changes

• Real daylight, not a lamp. A warm, moving patch of genuine sunlight - the light that lifts a room and your mood.
• No renovation. It mounts outdoors and uses the window you already have; no roof or wall work.
• You aim it. Set the target in an app; schedule different spots for different times of day.
• It works in winter too. When the low sun would otherwise miss the room entirely, the mirror still catches and redirects it.

What to realistically expect

Real daylight is wonderful precisely because it's alive - which also means it follows the sun and the weather. Being honest about that is part of choosing well:

• A moving patch, not a floodlit room. A heliostat lands a calm area of real daylight where you aim it, for the hours the sun reaches the mirror - it won't turn a north-facing room into a south-facing one.
• It follows the weather. On a heavily overcast day there's little direct sun to redirect. It adds the real daylight that does reach your property; it doesn't manufacture sun.
• Broad light, no hot spot. The mirror is slightly convex and creates no focal point. Glare is handled by built-in glare protection, a safe park position and the siting notes you follow at installation.

Frequently asked questions

How do I get sunlight into a dark room?

Direct sunlight only gets into a room if it has a way in: through a window that sees the sun, through a skylight or light tube, or via a mirror outside that follows the sun and redirects its light through your existing window. Paint and mirrors inside only spread the light that is already there.

What can I do as a renter?

Everything that leaves the building unchanged: clear the window, pale textiles, mirrors, lamps. Openings, new windows or light tubes need your landlord's consent. A heliostat stands outdoors; you need a spot you are permitted to use and, for a wall mount, permission to mount it.

Will a heliostat make my north-facing room as bright as a south-facing one?

No. It lands a calm, moving patch of real daylight where you aim it, for the hours the sun reaches the mirror - it won't flood the whole room or replace the sun on a heavily overcast day.

Is the redirected sunlight safe, or does it create a hot spot?

No. The mirror is slightly convex and creates no focal point, so the room receives a broad area of daylight and no hot spot forms. Glare is handled separately and by three measures - built-in glare protection, a safe park position, and the siting notes you follow at installation. Two of them are in the device, the third one is yours.

Do I need any construction or roof work?

No. The heliostat mounts outside and uses your existing window; nothing is built, cut or drilled indoors.

Does ohoya use a camera or the cloud?

The device has no camera, ever (the app uses your phone's camera only for the one-time AR setup, images stay on your phone), and no cloud is required - everyday operation works without an internet connection.