The UV output irradiance (in presence of theWG295 filter) has
been measured by an HD9021 calibrated radiometer (DeltaOhm
S.r.l.), equipped with two detector heads, one for UVB 280–
315 nm spectral region and another for UVA 315–400 nm one.
Both the UVB and UVA irradiances have been measured, being
the results values 1.8 and 9.5 mW/cm2 respectively. An
erythemal irradiance of 0.5 mW/cm2 has been measured by an
erythema like radiometer [19], to which correspond to a dose of
3, 9, 15 and 30 SED for the four different exposure times