standard erythemal dose

[] SED

A standardized measure of erythemogenic UV radiation. One SED is equivalent to an erythemally effective radiant exposure of 100 J/m2 when the radiation is weighted by the erythema action spectrum normalized to its maximum, ser(λ).

(See also erythemal action spectrum.*)


* A Reference Action Spectrum for Ultraviolet Induced Erythema in Human Skin, CIE Publication 106; 106/4. Vienna, Austria: International Commission on Illumination; 1993.

« Back to Definitions Index