actinic dose [Hact]
quantity obtained by spectrally weighting the radiant exposure (dose) with the actinic action spectrum
where Eλ(t) is the spectral irradiance in W⋅m-2⋅nm-1 and sact(λ) is the actinic action spectrum normalized to 1 at its maximum
NOTE This definition implies that an action spectrum is adopted for the actinic effect considered, and that its maximum value is 1. When giving a quantitative amount, it is essential to specify according to which actinic action spectrum the dose is meant, as the unit is the same.