Language of Light 2.Concepts 2.1 RADIOMETRY 2.1.1 Radiant Flux 2.1.3 Irradiance 2.1.2 Radiant Intensity 2.1.4 Radiance 2.2 SPECTRORADIOMETRY 2.2.1 Spectral Radiance 2.2.2 Spectral Irradiance 2.3 PHOTOMETRY 2.3.1 Luminous Flux 2.3.3 Illuminance 2.3.2 Luminous Intensity 2.3.4 Luminance 2.4 COLORIMETRY 2.4.1 Colour 2.4.3 Mixing of Colours 2.4.4.1 Tristimulus Colorimetry 2.4.4.1.2 CIE 1976 UCS Chromaticity Chart 2.4.4.2 Colour Temperature 2.4.4.3 Spectroradiometry 2.4.2 Colour Perception 2.4.4 Light Source Colour Specification 2.4.4.1.1 CIE 1931 Yxy Chromaticity Chart 2.4.4.1.3 Helmholtz Coordinates 2.4.4.2.1 Correlated Colour Temperature
