Two rooms can have identical furniture, paint and layout — and still feel completely different, purely because of the colour temperature of the light. Here's what you need to know before you buy a bulb.
The Kelvin scale, in plain English
Light temperature is measured in Kelvin (K). The lower the number, the warmer and more amber the light; the higher the number, the cooler and bluer it appears.
- 2700K–3000K (Warm White) — soft, amber, candle-like. The most flattering and relaxing tone for most homes.
- 3500K–4100K (Neutral White) — cleaner and brighter, without tipping into clinical. Good for kitchens and workspaces.
- 5000K+ (Daylight/Cool White) — crisp and blue-toned, closest to natural daylight. Best reserved for task-heavy spaces.
Where warm white works best
Living rooms, bedrooms and dining spaces almost always benefit from warm white — it's the tone most associated with comfort and relaxation. Nearly everything in our wall lights and pendant collections is designed to be paired with a warm E27 bulb for exactly this reason.
Where cooler light earns its place
Kitchens, home offices and bathrooms are the exception — a neutral or cool white supports focus and makes fine tasks (chopping vegetables, reading labels, applying makeup) easier and safer.
The mistake to avoid
Mixing temperatures within the same room is the single most common way a well-designed space starts to feel slightly "off" — even if no one can quite say why. If you're layering multiple fixtures in one room, keep the Kelvin rating consistent across all of them.
Our tip: if you're only going to buy one flexible option, choose a dimmable warm-white bulb. It covers the widest range of moods with the least effort.