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