IEC 60068-2-5:2010 provides guidance for testing equipment or components under solar radiation conditions. The purpose of testing is to investigate to what extent the equipment or components are affected by solar radiation. This second edition cancels and replaces the first edition of IEC 60068-2-5, published in 1975, and IEC 60068-2-9, published in 1975, and constitute a technical revision. The main changes with respect to the previous edition are listed below: This second edition of IEC 60068-2-5 will make the reading much easier, partly because it includes guidance for solar radiation testing, previously published in a separate publication, IEC 60068-2-9, and partly because it now allows the use of all lamps specified in CIE 85 and published in 1985 by the International commission on Illumination. The contents of the corrigendum of December 2010 have been included in this copy.