Light & Engineering Vol. 23, No. 2, pp. 64-69, 2015 Svetotekhnika No. 2, 2015, pp. 61-65 PROBLEMS OF SPECTRORADIOMETRIC MEASUREMENTS Oleg M. Mikhailov The S-Petersburg State Institute of Cinema and Television E-mail: mom1938@mail.ru ABSTRACT Modern methods of photometric and colorimetric measurements are increasingly moving towards use of spectral concentration of a photometric value to determine both integral effective values, and to measure colorimetric values of self-luminous and non-self-luminous radiation sources applied in lighting installations and lighting devices. <...> This is linked to decreasing use of incandescent lamps and to the expansion of energy effi cient modern radiation sources in illumination technology. <...> This article is dedicated to the problem of spectral measurements of optical radiation in a wide spectrum interval. <...> Keywords: energy photometry, visual measurements, correlation adjustment, effi ciency, error, spectral concentration of power and energy, computer transformation, light-emitting diode (LED), radiation chromaticity, electroluminescence, radiation spatial distribution 1. <...> The subject under consideration is a basic activity of the majority of companies and educational institutions in energy photometry, which is in turn an integral part of light engineering as an illumination science. <...> LIGHT-EMITTING DIODES (LEDS), TRADITIONAL SOURCES, ENERGY SAVING AND EFFICIENCY differs from energy fl ow, in watts (ΦΦ() )ee d and amounts to: Luminous fl ux effective value (Φv), in lumens = ∫ ΦΦ∫vm e() () , =kV d 380 780 where Km is maximum spectral luminous effi ciency (Кlm W m = 683 / ), Φe() is spectral concentration of energy fl ow. <...> V () is relative spectral radiation luminous effi ciency for day sight of the CIE stan dard photometric observer. <...> Thus, luminous fl ux is an effective value formed as a result of exposure of the eye to electromagnetic radiation, whereas surrounding objects are not infl uenced by light. <...> The changes, which occur in an object, depend on its properties and on spectral concentration of the radiation power. <...> Energy power (radiation fl ow) is caused not only by the visible interval of electromagnetic radiation; it covers a big spectral range. <...> To evaluate (not to measure light characteristics) an illumination <...>