Light & Engineering Vol. 23, No. 4, pp. 51-54, 2015 Svetotekhnika No. 2, 2015, pp. 45-47 ONCE MORE ON THE SUBJECT OF PREVENTIVE UV–IRRADIATION AS A MEANS TO ELIMINATE “SOLAR STARVATION” Galina N. Gavrilkina, Elena I. Ilyinna*, and Henri S. Sarychev VNISI Open Company, Moscow *NIIOT Open Company, Ivanovo E-mails: gavrilkinagn@mail.ru, svetosar@mail.ru, niiotsvet@mail.ru ABSTRACT Reducing respiratory disease incidence and strengthening the human immune system is possible by the use of ultra-violet irradiation during autumn and winter periods. <...> The article confi rms that UV irradiation standards accepted in Russia don’t contradict the international standards on safety of lamps and lamp systems. <...> Keywords: preventive ultraviolet irradiation, ultra-violet irradiation (UVI), erythema spectrum area, irradiation dose, UVI standards In accordance with [1], the International Commission on Illumination (CIE) classifi es UV in the optical radiation spectral area of 100–400 nm as follows: UV-А is from 315 to 400 nm, UV-В is from 280 to 315 nm, UV–С is from 100 to 280 nm. <...> The greatest risk is concentrated in the UV–C interval, which is an area of optical radiation bactericidal infl uence. <...> The UV-B middle interval of UV radiation is aggressive enough and at the same time, if irradiation is strictly dosed, can be very helpful. <...> Even since publication of the unique monograph of A. Meyer and E. Zeitz [2], UV-B has been named preventive radiation. <...> Finally, UV-A is the most “soft” ultraviolet, which admits suffi cient irradiation levels, as shown in standard [3]. 51 It should be noted that CIE standard S009/E: 2002 “Photobiological Safety of Lamps and Lamp systems” [3] distinguishes only two areas of UV spectrum: 200–400 nm (with a strict regulation of the irradiation actinic dose of no more than 30 J/ m2) and UV-A area (315–400) nm admitting a high enough limit of the dangerous irradiance equal to 10 W/m2 during irradiation time t > 1000 s. <...> UV-B area especially distinguished in [1 <...>