Published: Jan 1967
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Although certain terms listed below are used exclusively in lighting technology, for the majority of the characteristics an extension to radiation in general is possible. In consequence, most terms may therefore be defined both for radiation in general and evaluated in energy units, and for visible radiation and evaluated in units related to light. If confusion of characteristics is to be feared — due to evaluation using different spectral function — qualifying adjectives like radiant or luminous should be used. Similarly the corresponding characteristics in both sets of quantities are to be designated by the same principal symbol and, when necessary, distinguished by adding the subscript e (energy) for the radiometric or v (visual) for the photometric quantities, respectively.
Paper ID: STP43560S