Technical notes - theory

Definitions
Accuracy - Trueness - Precision - Repeatability - Reproducibility

Correlated Colour Temperature
Colour temperature - Correlated colour temperature

Dominant Wavelength and Purity
The dominant wavelength (of a colour stimulus) is defined as: "the wavelength of the monochromatic stimulus that, when additively mixed in suitable proportions with the specified achromatic stimulus, matches the colour stimulus considered".

Measuring illuminance with a luminance meter

Describes the theory of measuring illuminance with a luminance meter.