Winter light in a north-facing room: a year of flat energy

A north-facing room in a northern city gets no direct sun between October and March, and no lamp fixes that. What a lamp fixes is narrower and worth knowing.

The room with no direct sun

Hal’s office is the smaller bedroom, and its window faces north onto a brick wall two metres away. Direct sun reaches it for no part of the year.

He knew this when he took the flat and did not think it mattered. He worked in an office with no windows for six years before that.

The difference is that an office has other people in it. A north-facing room at nine in December has nothing else to look at.

What December actually measures

In December the room gets about six hours of usable daylight, all of it indirect and none of it strong. The window is also partly shaded by the opposite wall.

He measured it with a cheap light meter for a week, which is more than most people do. The reading at his desk at ten was a fifth of the reading outside.

That fifth is the number that explains the whole winter. It is not darkness; it is a permanent late afternoon that never resolves into evening.

The desk he put against the wall

His first layout put the desk against the long wall, facing the brick. It was the obvious position and it was the worst one available.

Facing a wall two metres away removes the only long view in the room. The eye has nowhere to rest except the screen.

He spent November working there and finishing each day with a headache behind one eye. He blamed the monitor for three weeks.

Moving the desk 1.2 metres

In December he moved the desk to the short wall, under the window, and turned it side-on. The desk now runs parallel to the glass instead of facing it.

Sitting side-on gives him the length of the room in peripheral vision. The window is at his left shoulder, which puts the sky in view without putting it in front.

Headaches stopped within a week, which he attributes to the long view rather than the light. The move cost nothing and took forty minutes.

The lamp he returned

He bought a daylight lamp with a large panel and used it for eleven days. It made the desk bright and left the room exactly as grey as before.

The return was not a failure of the lamp. It was a failure of the expectation that a desk-sized light could change a room-sized problem.

What he kept was a small lamp aimed at the wall behind the desk. Bounced light fills the corner without putting a bright rectangle in his eye line.

Light before the screen

The habit that carried the winter was fifteen minutes outside before the first meeting. He walks to the main road and back, which is the only open sky nearby.

This is not about the room and it does more than anything in the room. Outdoor light in December is weak and still twenty times brighter than indoor light.

He does it before opening the laptop, because the laptop is what makes it optional. Once the first message arrives, the walk does not happen.

The February change

He marked each day on a wall calendar with a letter for how the afternoon felt. By February the letters had shifted without any change in his routine.

The shift is roughly forty minutes of usable afternoon, which he can see in the calendar and cannot feel day to day. Daylight is a seasonal curve, not a daily one.

That is why the winter feels like a personal failing and is not one. The room is doing the same thing in February as in November.

Summer and the glare

The north-facing room has one problem in June, and it is the opposite one. Low sun in the early morning comes in almost horizontally and lands on the screen.

He solved it with a cheap roller blind that he lowers to two-thirds. The room stays bright at desk level and the screen stops reflecting the window.

The same blind that was useless in winter is the correct tool in summer. He keeps it because the room needs different things eight months apart.

The winter the pattern broke

In the second January he had a project that started at seven each morning, which removed the walk. The letters on the calendar went flat within ten days.

He tried to replace the walk with a bright lamp at the desk, and it did not work. Fifteen minutes of outdoor light is not equivalent to any indoor substitute.

When the project ended he moved his start time instead of his walk. The walk is the part he now treats as fixed.

What a lamp can do

A lamp can make a desk usable and can make a corner look intentional. It cannot raise the light level of a room enough to change a season.

The useful target is contrast, not brightness. A bright pool beside a dark wall is worse than a moderate, even level across the room.

Hal’s second lamp points at the ceiling and runs all day in winter. It draws eighty watts and he considers it the best money in the room.

The noon walk

The second walk is at noon and it is shorter, eight minutes around the block. It exists to break the middle of the day rather than to add light.

In winter it is also the only time the sky is bright enough to register. The morning walk is for the clock; the noon walk is for the eyes.

He noticed that the noon walk helps most on the days he does not want to take it. That is usually a sign the day has already gone flat.

Whether to move flats

He looked at two flats in March and rejected both for reasons that had nothing to do with light. The north room was liveable by then.

The changes that made it liveable were a desk move, two lamps, a blind, and two walks. None of them required a different building.

He would still advise against a north-facing room for anyone who works in it all day. He would also say that the room is not the reason for the winter.

If a north-facing room costs you forty minutes of afternoon and a desk move recovers half of it, when is moving flat the honest answer?