A brief analysis of the previously proposed indexes for assessing the publication activity of the authors is presented. Their shortcomings and low information content and reliability are shown.

Keywords: diversification of management, production diversification, financial and economic purposes of a diversification, technological purposes of ensuring flexibility of production

To significantly increase the accuracy of measurement and the reproducibility of the results, a method has been developed for determining the decrease in illumination of filamentary LED lamps. The necessity and possibility of realization of the first reading of illumination in one second is grounded.

Keywords: filament lamp, illumination recession, method, error, criterial value, rate of decline

The article first developed and proposed criterion values for 11 basic and 8 additional parameters of LED lighting devices intended for a comprehensive analysis of their quality. Of these, 10 parameters are essentially new.

Keywords: parameter, criterion value, quality control, main parameter, additional parameter, non-standard parameter

Electroencephalograms were registered in 5 clinically healthy undergraduates using the Neurovisor GMM device when a light stream with a frequency of 0, 3, 9, 21, 50 and 100 Hz was operated on the human visual apparatus with a coefficient of its ripple from 0 to 80%. It is shown that it is impossible to establish directly by the electroencephalogram a control of the pulsating action of the light flux on the bioelectric activity of the human brain, even at low frequencies.

Keywords: electroencephalography, coefficient and frequency of pulsation, alpha-rhythm, photostimulator, incandescent lamp, LED lamp