How to Choose the Right Light Color: The Secret of the Kruithof Curve
Understanding the Kruithof Curve for Comfortable & Efficient Lighting
The Kruithof Curve shows that lighting comfort depends on the balance between light color (warm or cool) and illuminance (lux), not just one factor alone. Here are the key points for easy application:Low Light (less than 300 lux)
❌ Cool White (5000–6500K): Uncomfortable, feels cold and gloomy, and the space appears unnatural. The reason is that our eyes associate cool white with bright daylight, so when it’s dim, it creates a sense of mismatch.
✅ Warm Light (2700–3000K): Comfortable and cozy, perfect for home settings like bedrooms and living rooms.High Light (more than 500 lux)
❌ Very Strong Warm Light: Can be annoying or feel heavy, not suitable for areas that require clarity and focus, such as offices or classrooms.
✅ Cool or Neutral White (4000–6000K): Ideal for bright lighting, helps concentration, and provides a clean, clear feeling.Practical TakeawaysFor low light → use warm colors.
For high light → use cool or white colors.The balance between color and intensity is the key to comfortable and effective lighting.
