What does the term “color temperature” refer to in lighting?

The term "color temperature" refers to the warmth or coolness of light, which is measured in degrees Kelvin (K). This metric describes the appearance of the light emitted by a source, reflecting how warm (more red or yellow) or cool (more blue) it appears to the human eye. For example, a light source that has a lower color temperature (around 2700K to 3000K) provides a warm, yellowish light that resembles incandescent bulbs, whereas a higher color temperature (above 5000K) emits a cooler, bluish light similar to daylight.

Understanding color temperature is crucial in lighting design and application, as it significantly impacts the mood and ambiance of a space. For instance, warmer light colors are often preferred in residential settings for their comfort, whereas cooler lights are more commonly utilized in office environments to promote alertness and concentration. This aspect of lighting design greatly influences not only aesthetic choices but also functional outcomes in various settings.