The correlated color temperature is another way to describe a light source’s color point on the 1932 CIE chromaticity diagram. It compares the color to that of a blackbody source heated to a certain temperature. For example, light bulbs are described as 2700K, 5000K, or 6500K. The light bulbs themselves don’t get that hot, but the color is the same as a blackbody source raised to each of those temperatures.
The CCT can be calculated in SpectraWiz on the 1932 CIE chromaticity diagram by clicking the “CCT” button. A white curve will appear on the diagram representing the color and temperature of a blackbody source. The measured temperature appears in the status bar of the diagram window.
