Abstract
AbstractRadiometric properties of materials for lighting and building have to be known in the UV, visible, and IR regions of the spectrum. Radiometric and photometric properties can be measured with spectrometers independent of the spectral power distribution of the irradiating source used for measurement provided there is sufficient radiant energy available at all measured wavelengths. However, for luminescent materials a precise simulation of the reference illuminant has to be used for measurement, otherwise the measured characteristics are meaningless.
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