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Color Temperature Explained: Which Light Source Should I Choose?
Track Lighting for home/1-circuit
Track lighting for home, also known as 1-phase lighting.
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Track lighting for the office, also known as 3-phase lighting.
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Track lighting with magnetic mounting for home.
View magnetic lightingThe color of light has a big influence on how a space feels. Warm light makes a room cozy and relaxing, while cool light brings freshness and focus. This light color is called the color temperature, expressed in Kelvin (K). In this article, we explain what the different color temperatures mean and help you choose which one best fits your interior or application.
What is color temperature?
The color temperature of lighting determines whether the light appears warm or cool.
It is expressed in Kelvin (K):
- A low value (e.g. 1800K or 2700K) produces warm, yellowish light.
- A high value (e.g. 5000K or 6500K) produces cool, bright white light.
The right color temperature greatly affects the atmosphere of a room.
Warm light creates comfort and coziness, while cool light enhances concentration and clarity.
Below you’ll find what each color temperature means and where it’s best used.
Each color temperature explained:
1800K – Extra warm candlelight
1800 Kelvin gives a very warm, amber glow that closely resembles candlelight or firelight. It creates a highly atmospheric and intimate feel — perfect for evening use or spaces where you want to create a luxurious, cozy ambiance.
Ideal for restaurants, living rooms or bedrooms with a relaxing mood.
Tip: Use 1800K to emphasize warmth and comfort, especially combined with dimmable lighting.
View our dimmable 1800K GU10 bulb
2700K – Warm and cozy
2700 Kelvin provides a soft, warm glow similar to traditional incandescent light. It feels homely and is ideal for living rooms, bedrooms, or hospitality spaces where a comfortable and inviting atmosphere is desired.
Tip: Choose 2700K when you want to highlight warmth and coziness in your interior.
View our dimmable 1800K–2700K GU10 bulb or our dimmable 2700K GU10 bulb
3000K – Warm white with a modern look
3000 Kelvin is slightly cooler than 2700K but still retains a warm tone. It creates a modern and inviting atmosphere that works well in kitchens, dining areas, or retail environments. Perfect when you want brighter light without losing warmth.
Tip: Great for areas where ambiance and practicality meet.
View our dimmable 3000K GU10 bulb
4000K – Fresh white and functional
4000 Kelvin delivers a fresh, bright white light without a blue tone. It creates a tidy, professional look that’s pleasant in work areas, hallways, or kitchens. Functional light that offers clarity without feeling cold.
Tip: Ideal for spaces where visibility is important but you don’t want harsh daylight tones.
View our dimmable 4000K GU10 bulb
Smart adjustable light – RGBW
Modern smart RGBW bulbs let you adjust not only the color temperature (from 1800K to 6500K) but also choose from millions of colors. This gives you full control over the mood: warm and cozy in the evening, bright and fresh during the day, or with a subtle color accent.
Tip: Perfect if you want lighting that adapts to the moment, your mood, or your interior style.
View our smart GU10 bulb
Conclusion
The right color temperature defines both the atmosphere and the functionality of your lighting. From the warm, relaxing glow of 1800K to the bright daylight of 6500K – each color temperature has its own purpose.
For maximum flexibility, choose a smart RGBW bulb that allows you to easily switch between warm white, cool white, and colored light. This way, you can always create the perfect lighting for every moment and every space.
