The UVB content of 'UVA fluorescent lamps' and its erythemal effectiveness in human skin

Abstract

The UV-B emission from 10 different types of UV-A fluorescent lamp was measured by spectroradiometry. The mean ratio of UV-B emission to UV-A emission was 0.94 .+-. 0.35 (1 SD)%. By weighting the spectral irradiance of each lamp by the DIN standard erythemal curve, the mean erythemally effective UV-B emission (normalized to 297 nm), expressed as a percentage of the UV-A emission, was 0.076 .+-. 0.049 (1 SD)%.