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Ashryatov A. A., Kuznetsov E. A., Smolin K. A.
Study of the lighting characteristics of Uniel retrofit LED lamps
DOI: 10.21443/1560-9278-2023-26-4-349-360
Abstract. The paper considers the photometric characteristics of LED retrofit lamps produced by the Russian-Chinese company Uniel: Uniel LED-G45-6W/4000K, Uniel LED-A60-8W/6500K, and Uniel LED-A60-9W/4000K, designed to replace traditional incandescent bulbs. During the research, comprehensive measurements of photometric parameters (luminous flux, power consumption, color temperature, color rendering index, ripple factor, power factor) have been carried out and the luminous efficacy has been calculated. The results of the measurements have been presented in relation to the supply voltage. Based on the data obtained, an analysis is carried out of the compliance of the initial measured characteristics of the lamps with the values declared by the manufacturer. The analysis of the emission spectra leads to the conclusion that the Uniel LED-A60-8W/6500K lamps are equipped with white light-emitting diodes, the spectrum of which consists of a blue emission band from the semiconductor crystal with a maximum at ~450 nm and a phosphor band with a maximum at ~560 nm, which converts some of the blue emission from the crystal into long-wavelength spectrum. The emission spectra of the Uniel LED-G45-6W/4000K and Uniel LED-A60-9W/4000K lamps, in addition to the blue emission band from the semiconductor crystal with a maximum at ~450 nm, contain emissions from two phosphors, the bands of which have maxima at ~560 nm (green) and ~630 nm (red), which results in a lower color temperature of the LEDs. The paper also provides a detailed analysis of the light power distribution curves, thermal operating conditions, and structural features of the lamps. The research results lead to the conclusion that it is advisable to recommend Uniel LED-G45-6W/4000K and Uniel LED-A60-9W/4000K lamps for use as light sources to replace traditional incandescent lamps because their photometric characteristics comply with the declared parameters and permissible deviations specified in the regulatory standards.
Printed reference: Ashryatov A. A., Kuznetsov E. A., Smolin K. A. Study of the lighting characteristics of Uniel retrofit LED lamps // Vestnik of MSTU. 2023. V. 26, No 4. P. 349-360.
Electronic reference: Ashryatov A. A., Kuznetsov E. A., Smolin K. A. Study of the lighting characteristics of Uniel retrofit LED lamps // Vestnik of MSTU. 2023. V. 26, No 4. P. 349-360. URL: http://vestnik.mstu.edu.ru/v26_4_n97/01_Ashryatov_349-360.pdf.
