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Colour Temperature

Colour Temperature in Canada

The same room can feel cosy or clinical depending on the colour of its light. That colour is described in kelvin, and the right value depends on the room and the time of year.

Updated June 3, 2026 ยท about a 7 minute read
Lamps of different colour temperatures shown side by side
Lamps at different colour temperatures, from warm to cool. Photo: Wikimedia Commons.

What kelvin describes

Colour temperature, written with a kelvin value such as 2700K or 4000K, tells you whether a lamp's light leans warm and yellow or cool and blue. Lower numbers are warmer. The figure is printed on most lamp packaging next to the lumens.

RangeAppearanceCommon use
Around 2700KWarm, soft yellowBedrooms, living rooms
Around 3000KWarm whiteDining areas, hallways
Around 3500โ€“4000KNeutral to cool whiteKitchens, bathrooms, workspaces
5000K and aboveCool, daylight-likeGarages, detailed task areas

Why it matters more in winter

Across much of Canada, daylight hours shrink considerably in winter, and many rooms rely on artificial light through the afternoon. When the light indoors is the main light for long stretches, its colour has a larger effect on how a room feels. A common approach is to keep living and sleeping areas warm so they stay comfortable in the dark evenings, while reserving cooler light for tasks that benefit from it.

A simple rule of thumb. Match colour temperature to purpose, not to every fixture. Warm where you relax, neutral to cool where you work, and keep it consistent within a single room so the light does not look mismatched.

Mixing temperatures

Two lamps of noticeably different colour temperatures in the same sightline tend to look like a mistake. If a room has several fixtures, choosing lamps with the same kelvin value keeps the light coherent. Where a room serves two purposes, separate switching or dimming is a cleaner solution than mixing colours.

Reading comparison images

Side-by-side photos of lamps at different kelvin values, like the one above, are useful for building intuition. Keep in mind that screens and cameras shift colour, so the in-store appearance and your own room are the final test.