Colour temperature
The colour of light is expressed in Kelvin and in point of fact, we are talking about colour temperature.
What tangible examples can be provided for this colour temperature? At a higher colour temperature, the light becomes a deeper blue (cooler), whereas the light becomes more yellow (warmer) at a lower colour temperature.
Please refer to some examples below.
| Candle light | 1200K |
| Sunrise | 2000K |
| Sunrise after 1 hour | 3500K |
| Day light | 5000K |
| Mid-day sun | 5700K |
| Neutral white light | 6500K |
The colour temperature has a great influence on the atmosphere in spaces. For example: warm light makes you quieter, whereas blue light increases your concentration.
Please refer to this overview of colour temperatures that Calex provides:
| Flame | 2200K |
| Extra warm white | 2100-2500K |
| Warm white | 2500-3000K |
| Cool white | 4000K |
| Day light | 6500K |
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