| effective dose with the spectral radiant exposure spectrally weighted with a stated photobiological action spectrum Note 1 to entry: This definition is based on the assumption that an action spectrum is adopted for the photobiological effect considered, and that its maximum value is 1. Note 2 to entry: It is essential to specify which action spectrum is used, as the unit is the same for any action spectrum. Note 3 to entry: The photobiological dose is expressed in joule per square metre (J·m−2).
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