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Vol. 22 (2019 year), No. 4, DOI: 10.21443/1560-9278-2019-22-4

Kovalenko O. Yu. , Zhuravleva J. A., Mikaeva S. A., Nemov V. V.
Changes of lighting characteristics of semiconductor light sources of different constructional performance during operation

Lighting using LED technology is used for domestic purposes, as well as in various sectors of the economy. In the process of studying low-power LED lamps with a power of 9, 10, 12W (various manufacturers), differing in their design and used as a replacement for incandescent lamps, such characteristics as power, light flux, light output, spectral distribution of radiation, correlated color temperature have been considered; the analysis of the indicated characteristics of light sources depending on the operating time has been given. The study of the electrical and lighting parameters of the lamps at the rated voltage of the mains has been carried out using a Gooch & Housego photocolorimetric measuring device, including the OL IS 7600 photometric ball and the OL 770 VIS / NIR multi-channel spectroradiometer. The measurements were carried out in accordance with GOST R 54350-2011 which establishes the lighting requirements and the corresponding test methods for lighting devices with electric light sources. Prior to the measurements, stabilization of all light characteristics of the lamps was established after they were turned on at the rated mains voltage. Analysis of the measurements has shown that Philips and Ecola lamps correspond to the declared parameters. In the process, the Ecola lamp has the smallest drop in parameters, the HomeClub lamp has the largest. The greatest luminous efficiency for the entire period of research has the Philips lamp, the smallest one – the lamp FL-LED BA ECO. As a result of studying the semiconductor light sources parameters, their high efficiency and feasibility of use in comparison with traditional light sources have been proved.

(in Russian, стр.5, fig. 5, tables. 4, ref 6, AdobePDF, AdobePDF 0 Kb)

Vol. 23 (2020 year), No. 4, DOI: 10.21443/1560-9278-2020-23-4

Zhuravleva J. A., Nesterkina N. P., Kuznetsov E. A.
Development of a special purpose LED ultraviolet lamp in a T8 flask

Fluorescent tubular ultraviolet lamps are used in medicine, industry, cosmetology, forensic science, and banking. During the development of the LED ultraviolet lamp in a T8 flask, a comparison of its lighting characteristics (power, energy flux, spectral distribution of radiation) with the parameters of special-purpose fluorescent lamps produced at industrial enterprises has been carried out. The design of the LED lamp includes a glass uviole tube with a diameter of 26 mm and a length of 322 mm (wall thickness is 1 mm, glass grade – SL97-3). For precise installation of the lamp in the irradiation facility and supplying electric power to it, plastic caps of the G13 pin type (the distance between the electrical contacts is 12.7 mm) are used. Measurements of electrical parameters, energy flux and spectral distribution of radiation have been carried out at nominal mains voltage on a Gooch &Housegophotocolorimetric measuring device. The developed LED lamp consumes seven times less electricity, has significantly longer (five times) expected service life and is a safer source of ultraviolet radiation, since it does not contain harmful vapors of mercury and its compounds. The LED ultraviolet lamp in a T8 flask can be used instead of the manufactured LUFT-10 lamps for special purposes, namely, in irradiators for carrying out technological processes (photochemical reactions, drying, curing), for attracting and disinsecting insects in traps, in photocopiers.

(in Russian, стр.6, fig. 7, tables. 2, ref 9, AdobePDF, AdobePDF 0 Kb)