 There are also differences in the initiation of mitochondrial (internal) and caspase-dependent (external) apoptosis for the UVC and UVB spectral ranges [9].Sunburn cells (SBS) are the keratinocytes in the process of UV-induced apoptosis (both “pure” and pro-inflammatory).The appearance of SBC may not be associated with an inflammatory reaction, but the role of UV-induced apoptosis of skin keratinocytes in the development of UV erythema (hyperemia, redness) of the skin has been established, which allowed the development of a patent-protected METHOD FOR QUANTITATIVE ASSESSMENT OF APOPTOSIS SYSTEM [10], in which “the brightest lamp of skin display "(photoerythema) is used (as an indicator of the manifestation of strictly dosed sterile inflammation) to diagnose the state of the body systems involved in the elimination of UV-induced damage.