| effective radiance with the spectral radiance, Lλ, spectrally weighted with the retinal thermal hazard spectral weighting function, r(λ) Note 1 to entry: The wavelength range for "retinal thermal radiance" is the "retinal hazard spectral region". Note 2 to entry: This definition is based on the assumption that an action spectrum is adopted for the effect considered, and that its maximum value is 1. Note 3 to entry: It is essential to specify which action spectrum is used, as the unit is the same for any action spectrum. Note 4 to entry: The retinal thermal radiance is expressed in watt per square metre per steradian (W·m−2·sr−1).
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