Choosing light colour: what Kelvin for each room?

Written by Engin Demirel · Electrical technician, master instructor · 12 years of experience

Short answer: Use 2700–3000K warm white where you relax (living room, bedroom), 3000–4000K where you work (kitchen worktop, bathroom mirror, desk) and mostly 4000K in offices and shops. Lamps sold as "daylight" are usually 6000–6500K and suit garages, storage and workshops rather than living spaces. Keep one colour temperature per room.

We explain what Kelvin is, and how it differs from lumens and watts, in our guide to lumens, watts and colour temperature. This article is practical: which light colour for which room, what the labels "warm white", "cool white" and "daylight" mean, and how to keep a home consistent.

Warm white, cool white, daylight: which value?

Packaging uses different names. Typical equivalents are roughly:

2700K: warm white, extra warm. Closest to the old incandescent bulb.
3000K: warm white, slightly less yellow; the most popular tone at home.
3500K: between warm and neutral; offered on few products.
4000K: neutral white, "natural white"; neither yellow nor blue.
5000K: cool white; displays, workshops, technical rooms.
6000–6500K: cool white, usually sold as "daylight"; bluish white.

Note that natural daylight has no single Kelvin value. Sunrise and sunset light is very warm (around 2000K), midday sun is roughly 5000–5500K and an overcast sky can reach 6500K or more. Most "daylight" lamps are 6500K, but some makers use the name for 5000K, so check the Kelvin figure, not the label.

Recommended light colour by room

These are common practice, not strict rules; furniture, wall colour and taste change the result.

Living room: 2700–3000K, with general, hidden and wall lights in the same tone. See lighting a living room without a ceiling pendant.
Bedroom: 2700K, at most 3000K, ideally dimmable. See bedroom lighting.
Kitchen: 3000K or 4000K overall, under-cabinet lights in the same tone. An open-plan kitchen looks best matching the living area. See kitchen lighting.
Bathroom: 3000–4000K; 4000K with good colour rendering at the mirror. Zones: bathroom lighting and IP zones.
Study and desk: 4000K; consider a tunable product if you work late.
Hallways and stairs: same tone as the rooms they connect, usually 3000K.
Office: 4000K is common; 3000K in lounges and meeting rooms.
Shops: 3000K for fashion and furniture, 4000K for grocery and pharmacy. See office and shop lighting.
Garage, storage, workshop: 4000–6500K.
Garden and facade: mostly 2700–3000K; stone, wood and plants look more natural.

3000K or 4000K?

Use 3000K for most of the home.
Use 4000K where you work or judge colours: worktop, mirror, desk, office.
Decide per room rather than mixing; an open-plan space should share one tone.
If unsure, try a colour-tunable (CCT) product first.

Is 6500K OK at home?

It works, but most people find it too cold for living rooms and bedrooms; skin looks pale and wood looks flat. For a brighter room, choose more lumens rather than a cooler colour: brightness comes from lumens, tone from Kelvin.

Colour temperature and CRI

Kelvin is the tone; CRI (Ra) is how faithfully colours are shown. CRI 80 is the usual minimum at home; choose higher CRI for kitchens, dressing areas, mirrors and shop displays.

Do not mix colours in one room

Keep every light source in a room at the same Kelvin.
The same Kelvin can look slightly different between brands; use one series per room where possible.
Note the Kelvin before replacing a bulb, and match strip and hidden lighting too: hidden lighting.

What are CCT (three-colour) products?

You choose the colour yourself: by a switch on the back, by switching off and on, or via app or remote. Handy when you are undecided or a room's use may change. For dimming, see dimmers and dimmable LEDs.

Evening light and sleep

Warm, low light in the evening is widely considered more restful, which is why 2700K and dimming are popular in bedrooms. Light colour alone will not fix sleep problems; brightness, duration and screens matter too. Ask a doctor about health concerns.

Light colour in our products

Lamptime luminaires: chosen at order, 2700K to 6500K depending on the product (2200K on some).
Molled MOL7205 (5 W) and MOL7207 (7 W) CCT LED bulbs switch between 3000K, 4000K and 6500K.
Our own ENGN Lento garden light is 3000K; MOL7205 and MOL7207 fit our ENGN Vion GU10 downlights directly.

You can compare light colours side by side in our shop in Nilüfer, Bursa.

Frequently asked questions

What Kelvin is daylight?

Natural daylight varies: around 2000K at sunrise, roughly 5000–5500K at midday and 6500K or more under cloud. Lamps sold as "daylight" are mostly 6000–6500K.

What Kelvin is warm white?

Usually 2700–3000K. 2700K is closest to an old incandescent bulb.

What colour is 4000K?

Neutral white, neither yellow nor blue. Common in kitchens, bathrooms, desks, offices and grocery shops.

What Kelvin for a bedroom?

Usually 2700K, at most 3000K, ideally dimmable.

3000K or 4000K for a kitchen?

4000K gives crisp light in a closed kitchen; an open-plan kitchen looks more coherent at the living area's tone, often 3000K.

Is 6500K too cold for a home?

For living rooms and bedrooms most people find it too cold. It suits garages, storage and workshops. For more brightness, increase lumens instead.