The color temperature of light denotes how the light appears on a spectrum from warm (yellow-toned) to cool (blue-toned). It's measured in degrees of Kelvin (K) on a scale from 1,000 to 10,000.

As you move from lower to higher Kelvin ratings, the color temperature ... are spaces where the most light is typically needed. Hallways fall on the other end of the scale, whereas dining rooms ...