Julian B. Aizenberg
International Activity in Field of Light and Engineering: Creative Report

Vladimir V. Voronov and Nikolay I. Shchepetkov
On Methodology for Designing Architectural Lighting of Production Site Interior

Aysegul Tereci and Оzge Оzata
Analysis and Strategies for Zonal Lighting Design of Konya Mevlana Museum and Mevlana Culture Centre Axis

Yulia A. Skorik
About Effect of LED Lighting and its Dynamics on Visual Functions and Overall State of a Spectator

Peter Bodrogi, Diana Carella, and Tran Quoc Khanh
Weighting the Relevance of the Different Colours in Subjective Assessments of Colour Preference

Fatih Atalar, Kerim Uzun, Ahmet Gedikli, Aysel Ersoy Yılmaz, and Mukden Uğur
A Study on the Effect of Light Sources on the Colour of Objects

Julian B. Aizenberg
International Activity in Field of Light and Engineering: Creative Report

Vladimir V. Voronov and Nikolay I. Shchepetkov
On Methodology for Designing Architectural Lighting of Production Site Interior

Aysegul Tereci and Оzge Оzata
Analysis and Strategies for Zonal Lighting Design of Konya Mevlana Museum and Mevlana Culture Centre Axis

Yulia A. Skorik
About Effect of LED Lighting and its Dynamics on Visual Functions and Overall State of a Spectator

Peter Bodrogi, Diana Carella, and Tran Quoc Khanh
Weighting the Relevance of the Different Colours in Subjective Assessments of Colour Preference

Fatih Atalar, Kerim Uzun, Ahmet Gedikli, Aysel Ersoy Yılmaz, and Mukden Uğur
A Study on the Effect of Light Sources on the Colour of Objects

This article is not a memoir. It aims at summing up the author’s activity (in a concise way) in solving the challenge he set for himself: to assist in development of Russian lighting engineering industry with consideration of the greatest achievements in design of lighting devices, their manufacturing technologies and the newest high-performance equipment as much as possible.

The author considered it important not just to sum up 65 years of his activity in light engineering and industry but also to provide the new generation of specialists with an opportunity to know and use the accumulated information and ways to take this opportunity for the benefit of Russian industry.

The article describes content of original and relevant but virtually forgotten thesis of V.V. Voronov on lighting of production site interiors by means of overhead natural (using three types of skylights) and artificial illumination, in order to elaborate scientific methodology for architectural design of more qualitative luminous environment on the basis of comprehensive approach and enhanced criteria framework of its evaluation using light engineering parameters.

The thesis is unique in terms of the scope and quality of field and laboratory observations which are reflected not only in the text but also in the graphical attachments, namely photos, figures, schemes, drawings, charts, nomograms, and diagrams accompanied by specific measured or calculated parameters.

1. Keleş R. Kentleşme Politikası. Ankara: Imge Kitapevi, 1990.
2. Lynch K. The Image of the City. Cambridge, MA: MIT Press, 1960.
3. Bilsel F., Bilsel S., Bilsel A. Kuramsal Yaklaşımlardan Kentsel Mekan Tasarımına. 1. Ulusal Kentsel Tasarım Kongresi “Kentsel Tasarım Bir Tasarımlar Bütünü”. İstanbul: M.S.Ü., 1999.
4. Tekeli İ. Türkiyede kent- bölgeleri üzerine düşünmek. İ. Tekeli içinde, Kent, Kentli Hakları, Kentleşme ve Kentsel Dönüşüm. Istanbul: Tarih Vakfı Yurt Yayınları, 2011, pp. 133–154.
5. Le Corbusier. Urbanisme. Paris: Éditions Crès, Collection de “L’Esprit Nouveau”, 1924.
6. Tekeli İ. Gecenin İstanbulu. İ. Tekeli içinde, Kent, Kentli Hakları, Kentleşme ve Kentsel Dönüşüm. İstanbul: Tarih Vakfı Yurt Yayınları, 2011, pp. 155–162.
7. Davoudian N., Visual saliency of urban objects at night: Impact of the density of background light patterns. LEUKOS, The Journal of the Illuminating Engineering Society of North America, 2011, pp. 137–152.
8. Ritter J., Master Planlar – Durum Değerlendirmesi. Professional Lighting Design Türkiye, 2006, pp. 56–61.
9. Mockey Coureaux I., Manzano E. The energy impact of luminaire depreciation on urban lighting. Energy for Sustainable Development, 2013. V17, pp. 357–362.
10. Peña-García A., Hurtado A., Aguilar-Luzón, M., Impact of public lighting on pedestrians’ perception of safety and well-being. Safety Science, 2015, pp. 142–148.
11. Beccali M., Bonomolo M., Leccese, F. Lista, D., Salvadori, G. On the impact of safety requirements, energy prices and investment costs in street lighting refurbishment design. Energy, 2018, pp. 739–759.
12. Cucchiella F., De Berardinis P., Lenny Koh S., Rotilio M. Planning restoration of a historical landscape: A case study for integrating a sustainable street lighting system with conservation of historical values. Journal of Cleaner Production, 2017, pp. 579–588.
13. Relph, E., Place and Placelessness. London, UK: Pion, 1976.
14. Beyhan Ş., Çelebi Gürkan Ü., Analyzıng The Relatıonshıp Between Urban Identıty and Urban Transformatıon Implementatıons in Hıstorıcal Process: The Case of Isparta. International Journal of Architectural Research, 2015, pp. 158–180.
15. Saban Ökesli D., Gürçınar Y. An investigation of urban image and identity. Ç.Ü. Sosyal Bilimler Enstitüsü Dergisi, 2012, pp. 37–52.
16. Topçu K., Kent kimliği üzerine bir araştırma: Konya örneği. Uluslararası İnsan Bilimleri Dergisi, 2011, pp. 1048–1072.
17. Bianchi C., Moroldo H., Burlacu C., Paut I., Researches Regarding The Urban Luminous Environment, from the Functional and Esthetical Points of View. In Lighting and City Beautification Congress, Istanbul, 2001, pp. 50–57.
18. Ganslandt R., Hofmann H. Handbuch der Lichtplanung. Germany: Vieweg+Teubner Verlag, 1992.
19. DIALux: http://www.dial.de/ adresinden alınmıştır, 2019.
20. Konya Büyük Şehir Belediyesi, Konya İl Merkezi Taşınmaz Kültür ve Tabiat Varlıkları Envanteri Konya, 2010.

1. SP 52.13330.2016 Daylighting and artificial lighting. The updated version of SNiP 23–05–95*. [Estesstvennoye i iskusstvennoye osvescheniye. Aktualizirovannaya redaktsiya SNiP 23–05–95]
2. Brainard G.C., Hanifin J.P., Rollag M.D., Greeson J., Byrne B., Glickman G., Gerner E., Sanford B. Human melatonin regulation is not mediated by the three cone photopic visual system // J. Clin. Endocrinol. Metab, 2001, Vol. 86, No. 1, pp. 433–436.
3. Brainard G.C., Hanifin J.P., Greeson J., Byrne B., Glickman G., Gerner E., Rollag M.D. Action spectrum for melatonin regulation in humans: evidence for a novel circadian photoreceptor // J. Neurosci, 2001, Vol. 21, No. 16, pp. 6405–6412.
4. IES TM-18: 2008 “Light and Human Health: An Overview of the Impact of Optical Radiation on Visual, Circadian, Neuroendocrine and Neurobehavioral Responses”.
5. DIN V 5031–100–2009 Strahlungsphysik im optischen Bereich und Lichttechnik. Teil 100. Über das Auge vermittelte, nichtvisuelle Wirkung des Lichts auf den Menschen. Größen, Formelzeichen und Wirkungsspektren (date of the application: 01.06.2009. Status: Replaced).
6. Van Bommel W. Dynamic Lighting of Offices – by Level of Illuminance and Colour [Dinamichnoye osvescheniye rabochikh pomescheniy – po urovnyu osveschyonnosti i tsvetu] // Svetotekhnika, 2006, # 6, pp. 15–18.
7. Gall D. et al. Definition and measurement of circadian radiometric quantities / Proc. CIE Symp.’04 on Light and Health, 2004, pp. 129–32.
8. Rea M. S. et al. Modelling the spectral sensitivity of the human circadian system // Lighting Research & Technology, 2012, Vol. 44, No. 4, pp. 386–396.
9. Arkhangelskiy D.V., Snetkov V. Yu. Study of Light Effect on Human Visual Performance and Fatigue with Consideration of Circadian Rhythms [Issledovaniya vliyaniya sveta na zritelnuyu rabotosposobnost i utomleniye cheloveka s uchyotom ego tsirkadnykh ritmov] // Bulletin of MPEI, 2012, Vol. 5, p. 104.
10. Bio-safety standardization of the LED light sources (WG report). Tokyo: Japanese Commission on Illumination, 2004.
11. Skorik Yu.A., Eliseev N.P., Grigoriev A.A. Analysis of Methods and Enhancement of Evaluation of Spectator’s Sight Functions [Analiz metodik i sovershenstvovanie otsenki zritelnykh funktsiy nablyudatelya] // Bulletin of MPEI, 2018, Vol. 2, pp. 95–101.
12. Skorik Yu.A., Bychin E.F., Dubov V.N. Comprehensive Evaluation of the Effect of LED Lighting on Visual Performance, Psychoemotional and Physiological State of University Students [Kompleksnaya otsenka vliyaniya svetodiodnogo osvescheniya na zritelnuyu rabotosposobnost, psikhoemotsionalnoye i fiziologicheskoye sostnyaniye uchashchikhsya vysshey shkoly] // Bulletin of MPEI, 2018, Vol. 4, pp. 97–104. DOI: 10.24160/1993–6982–2018–4–97–104.
13. Cherezova M.V., Kudryavtseva M.V., Snetkov V. Yu. Test Programme for Evaluation of Quality of Text Images on a Computer Display [Test-programma dlya otsenki kachestva tekstovykh izobrazheniy na displeye kompyutera] / Abstracts of the Conference Young Lighting Engineers of Russia. Moscow: Vigma, 2009, pp. 86–88.
14. Ataev A.E., Bynina M.V., Snetkov V. Yu. Determination of Visual Parameters of Individual Information Display Devices [Opredeleniye vizualnykh parametrov individualnykh sredstv otobrazheniya informatsii] // Bulletin of MPEI, 2012, Vol. 2, pp. 122–125.
15. Grigoriev A.A., Bynina M.V., Snetkov V. Yu. Determination of Optimal Range of Contrast of a Sign and a Background of Individual Information Display Devices [Opredeleniye optimalnogo diapazona kontrasta znaka s fonom individualnykh sredstv otobrazheniya informatsii] // Bulletin of MPEI, 2012, Vol. 5, pp. 92–94.
16. Doskin V.A., Lavrentieva N.A., Sharai V.B., Miroshnikov M.P. HAM Questionnaire [Oprosnik SAN]. / In: Psychological Tests. Vol. 1 [Psikhologicheskiye testy. T. 1] / Eds. A.A. Karelin. Moscow: Vlados, 2000.
17. Method of Evaluation of Haemodynamics Diseases [Sposob otsenki rasstroystv gemodinamiki] / Pat. of Ukraine No. 2216, 1998; Method of Diagnostics of Vegetative-Vascular Seizures [Sposob disgnostiki vegeto-sosudistykh paroksizmov] / Pat. of Ukraine No. 3028, 2004. Bul No. 10; The Process of Non-Invasive Determination of Homeostasis Parameters of Bioobjects [Protsess neinvazivnogo opredeleniya pokazateley gomeostaza obekta biosredy] / Pat. of Ukraine No. 3546, 2004. Bul. No. 11.
18. Russel D. Student’s T-Criterion: monograph [Tkriteriy Styudenta].Moscow: VSD, 2013, 741 p.

1. Esposito T., Houser K. Models of colour quality over a wide range of spectral power distributions. Lighting Research and Technology, 2018. First published online on April 13; DOI 10.1177/1477153518765953.
2. Lin Y., Wei M., Smet KAG, Tsukitani A., Bodrogi P., Khanh T.Q. Colour preference varies with lighting application. Lighting Research and Technology, 2015. V49, pp. 316-332.
3. Commission Internationale de l’Éclairage. CIE 2242017, CIE 2017 Colour Fidelity Index for accurate scientific use, Vienna: CIE, 2017.
4. Islam M.S., Dangol R., Hyvärinen M., Bhusal P., Puolakka M., Halonen L. User preferences for LED lighting in terms of light spectrum. Lighting Research and Technology, 2013; V45, pp. 641–665.
5. Dangol R., Islam M.S., Hyvärinen M., Bhushal P., Puolakka M., Halonen L. User acceptance studies for LED office lighting: Preference, naturalness and colourfulness. Lighting Research and Technology, 2015. V47, pp. 36-53.
6. Wei M., Houser K.W., David A., Krames M.R. Colour gamut size and shape influence colour preference. Lighting Research and Technology, 2017. V49, pp. 992–1014.
7. Royer M., Wilkerson A., Wei M. Human Perceptions of Color Rendition at Different Chromaticityticities. Lighting Research and Technology, 2018. V50, pp. 965–994.
8. Huang Z., Liu Q., Westland S., Pointer M.R., Luo M.R., Xiao K. Light dominates colour preference when correlated colour temperature differs. Lighting Research and Technology, 2018, V50, pp. 995–1012.
9. Wei M., Bao W., Huang HP. Consideration of Light Level in Specifying Light Source Colour Rendition. LEUKOS, 2018. Published online on 11 May; DOI 10.1080/15502724.2018.1448992.
10. Wei M. Maintaining Colour Preference under Different Light Levels. 15th China International Forum on Solid State Lighting, Shenzhen, 2018.
11. Khanh T.Q., Bodrogi P., Guo X., Anh P.Q. Towards a user preference model for interior lighting Part 2: Experimental results and modelling. Lighting Research and Technology, 2018. Published online on December 13; DOI 10.1177/1477153518816474.
12. Judd D.B. A flattery index for artificial illuminants. Illum. Eng. 1967. V62, pp. 593-598.
13. Rea M.S., Freyssinier J.P. Color Rendering: Beyond Pride and Prejudice. Color Research and Application, 2010. V35, pp. 401-409.
14. Bodrogi P., Guo X., Khanh T.Q. Semantic interpretation of the CIE 2017 colour fidelity index. Proc. CIE 2019 29th Quadrennial Session, Washington, 2019.
15. Wei M., Houser K.W. 2017. Systematic Changes in Gamut Size Affect Color Preference. LEUKOS, 2017. V13, pp. 23-32.
16. Royer M., Wilkerson A., Wei M., Houser K., Davis R. Human perceptions of colour rendition vary with average fidelity, average gamut, and gamut shape. Lighting Research and Technology, 2017. V49, pp. 966–991.

1. Dr. James L. Moody, Dexter P., “Concert Lighting: Techniques, Art And Business”, Focal Press, ISBN – 13:978–0–240–80010–3 (hbk), 2010.
2. Brooker D., “Essential CG Lighting Techniques”, RoutLEDge Imprint, e-ISBN: 9781136134708, 2002.
3. Çağlarca S., “Renk ve Armoni Kuralları”, İnkılap yay, ISBN: 9789751005762, 1993.
4. Duran M, “Ergonomik Tasarımda Renk”, Uludağ Üniversitesi Teknik Bilimler Meslek Yüksekokulu, ISSN1302-647X, 2005.
5. Çeken B., Yildiz E., “Renklerim Reklam Algısı üzerindeki Etkisi”, DOI: 10.7816/sed-03–02–08 sed, 2015.
6. Ciampi G., Rosato A., Scorpio M. and Sibilio S., “Basic System for the Preliminary Experimental Photometric Characterization of a LED Based Luminaire”, Light & Engineering, 2016. V24, #4, pp. 47–55.
7. Kuzmin V.N. and Nikolaev S.E., “Methods and Devices for Quick Evaluation of Optical Radiation Energy Efficiency under Photoculture Conditions”, Light & Engineering, 2016. V24, #4, pp. 99–104.
8. Ferencikova M.. and Darula S., “Availabity of Dayligting in School Operating Time”, Light & Engineering, 2017. V25, #2, pp. 71–78.
9. During G., Leloup F.B., Audenaert J. and Hanselaer P., “Modeling the Spectrum of a Luminaire Including a Dichroic Filter By Spectral Ray Tracing”, Light & Engineering, 2017. V25, #2, pp. 103–112.
10. Wang Z., “Analysis on the International Marketing Strategies of LED Lighting Enterprises in China”, Light & Engineering, 2017. V25, #3, pp. 211–217.
11. Liu Z., Hu S., Mu R. and Chen L., “Research on the Evaluation of Growth Quality of Listed LED Companies”, Light & Engineering, 2017. V25, #3, pp. 232–238.
12. Liu K. and Wang C., “Factors, Financial Structure and Financial Constraints of Lighting Lamps Manufacturing Enterprises”, Light & Engineering, 2017. V25, #3, pp. 177–186.

A problem of qualitative determination of the results of colour image capturing by digital devices based on uniform colour systems arises during analysis of colour images. The article describes methods of determining colour difference as recommended by CIE for the CIELAB system, presents mathematical formulation of the system and its modifications, describes the programme developed for calculating colour difference for each described method, and describes testing of this programme using 14 sample colours from the Munsell Book of Colour. Three groups of red, green and blue filters with 7 filters in each were selected as the study object. The filters were selected based on possibility of their further application for determining colour shift by digital devices. Filter colour difference was studied in the groups with different standard sources of light and using three methods of calculation of this difference. Analysis of the obtained results is presented and conclusions are made on possibility to apply each method in different industrial spheres. The article may be useful for colour analysis specialists, quality inspectors and specialists in digital devices and computer vision.

Climate change and the environmental pollution during the building operation in the last years cause of the reconsideration of exits standards/guidelines in buildings. Recent studies show the nonconformity of these guiding documents, which do not fully consider the climate of the regions when building the recommendations. As a result of this lack, the building operation does not reach the energy efficiency together with the thermal and visual comfort.

1. Darula S. Review of the Current State and Future Development in Standardizing Natural Lighting in Interiors// Light & Engineering, 2018, Vol. 26, #4, pp. 5–26.
2. Mardaljevic J, Heschong L, Lee E.S. Daylight metrics and energy savings// Lighting Research and Technology, 2009, Vol. 41, #3, pp. 261–283.
3. Mardajevic J, Christoffersen J, Raynham P (2013) A proposal for a Europiean standard for daylight in buildings. Lux Europa 2013 12th European Lighting Conference, Krakow, Pola: 237–250.
4. Mardaljevic J, Christoffersen J (2017) Climate connectivity in the daylight factor basis of building standards. Building and Environment 113: 200–209.
5. TCXD29:1991 (1991) Natural lighting in civil works. Ministry of Construction, Hanoi: 85.
6. SP 52.13330.2016 (2017) Natural and artificial lighting. Standartinform, Moscow: 135.
7. Solovyov AK (2008) Physics of the environment. Publisher ABC, Moscow: 344.
8. Lynes JA (1979) A sequence for daylighting design. Lighting Research and Technology 11(2): 102–106.
9. Crisp V H C, Littlefair P J (1984) Average daylight factor prediction. Proc. Nat.Lighting Conf., Cambridge (London: CIBSE): 234–243.
10. Moon P, Spencer D (1942) Illumination for a Nonuniform Sky. Illuminating Engineering 37(10): 707–726.
11. Reinhart CF, Mardaljevic J, Rogers Z (2006) Dynamic daylight performance metrics for sustainable building design. Leukos 3(1): 7–31.
12. Waldram P J (1909) The measurement of illumination: Daylight and Artificial: with Special Reference to Ancient Light Disputes. The Journal of the Society of Architects 3: 131–140.
13. BSI. (2009) Lighting for Buildings. Part 2: Code of practice for daylighting. BS8206–2:2008. National house building council: 98.
14. IES LM-83–12 (2012) Approved Method: IES Spatial Daylight Autonomy (sDA) and Annual Sunlight Exposure (ASE). The Illuminating Engineering Society of North America, New York: 512.
15. Kevin V D W, Alen M (2016) Annual daylighting performance metrics, explained. Architecture lighting & technology:15.
16. Amir Nezamdoost, Kevin Van Den Wymelenberg (2015) A Comparative Study of Spatial Daylit Area Drawings with Annual Climate-based Simulation Using Multiple Manual Blind Control Patterns, and Point-intime Simulation. ASHRAE Energy Modeling Conference: Tools for Designing High Performance Buildings, Atlant, GA:27.
17. Nabil J A (2006) Useful daylight illuminances: A replacement for daylight factors. Energy and Buildings 38(7): 905–913.
18. Nabil A, Mardaljevic J (2005) Useful daylight illuminance: a new paradigm for assessing daylight in buildings. Light research and Technology 37: 41–59.
19. Mardajevic J, Christoffersen J (2013) A roadmap for upgrading national/EU standards for daylight in buildings. CIE Centenary Conference “Towards a New Century of Light”, Paris, France: 178–187.
20. Phuong Khanh Thi Nguyen, Aleksei Solovyov (2018) Potential daylight resources between tropical and temperate cities- a case study of Ho Chi Minh City and Moscow. MATEC Web of Conferences 193, 04013 (2018). https://doi.org/10.1051/matecconf/201819304013
21. Miroslav Fabian, Yoshiaki Uetani, Stanislav Darula (2018) Monthly luminous efficacy models and illuminance prediction using ground. Solar Energy 162: 95–108.
22. Huang J (2011) ASHRAE Research Project 1477RP Development of 3,012 typical year weather files for international locations. White Box Technologies, Moraga CA: 86.
23. Thi Khanh Phuong Nguyen, Solovyov AK, Thi Hai Ha Pham, Kim Hanh Dong (2020) Confirmed Method for Definition of Daylight Climate for Tropical Hanoi. Advances in Intelligent Systems and Computing 982(01):35– 47. DOI: 10.1007/978–3–030–19756–8_4
24. Christoph F Reinhart, Daniel A Weissman (2012) The daylit area – Correlating architectural student assessments with current and emerging daylight availability metrics. Building and Environment 50 (0): 155–164. https://doi.org/10.1016/j.buildenv.2011.10.024
25. Perez Y V, Capeluto I G (2009) Climatic considerations in school building design in the hot-humid climate for reducing energy consumption. Applied Energy 86(3), pp. 340–348.

The symmetric Bruggeman approximation, also known as the Effective Medium Approximation (EMA), is widely used in applications including the description of light scattering on inhomogeneous structures containing discrete inclusions. However, in the latter case, the natural asymmetry of the fillers topology, where discrete inclusions are mostly surrounded by the material of a simply connected matrix, is not taken into account. In this paper, two versions of asymmetric EMA are proposed for the case of a statistically isotropic medium containing discrete inclusions based on the difference in the structure of the fields inside and outside the inclusions. One of them does not differ too much from the usual EMA and leads to the same percolation threshold. For the second, the threshold value differs from the usual one even in the case of spherical particles. Expressions are given for the corresponding percolation thresholds in the model of randomly oriented elliptical particles. The proposed approximations are compared with the standard Maxwell Garnett and Bruggeman approximations for the case of silver particles in a dielectric matrix.

1. Apresyan L. A., Effective electrodynamic parameters of nano-composiote media and the homogenization theory.// Light & Engineering, 2019, Vol. 27, No. 1, pp. 4–14.
2. Stroud D., Generalized effective-medium approach to the conductivity of an inhomogeneous material.// Phys. Rev. 1975, B12, № 8, pp. 3368–3373. DOI:10.1103/ PhysRevB.12.3368.
3. Apresyan L.A., Vlasov D.V., Zadorin D.A. et al. On the effective medium model for particles with a complex structure// Tech. Phys. 2017, Vol. 62, pp. 6–13. DOI:10.1134/S1063784217010029
4. L. D. Landau, E.M. Lifshitz. Electrodynamics of Continuous Media. Vol. 8 (1st ed.). N.Y.: Pergamon Press, 1960, 417 p.
5. Bruggeman D.A.G. Calculation of various physics constants in heterogeneous substances. I. Dielectric constants and conductivity of mixed bodies from isotropic substances.//Ann.Phys. 1935, V.23, pp. 636–664. DOI: 10.1002/andp.19354160705
6. Milton G.W. The Theory of Composites. Cambridge Univ. Press, 2004, 749p.
7. Lynch D.W., Hunter W.R. In: Handbook of Optical Constants of Solids. Ed. Palik E.D. N..Y.: Academic Press, 1985, pp. 350–356.
8. Bohren C.F. Applicability of effective-medium theories to problems of scattering and absorption by nonhomogeneous atmospheric particles.// J. Atmosph. Sci, 1986, Vol. 43, pp. 468–475. doi: 10.1175/1520– 0469(1986)043 %3C0468: AOEMTT%3E2.0.CO;2
9. Mishchenko, M. I., Dlugach, J. M., & Liu, L. Applicability of the effective-medium approximation to heterogeneous aerosol particles.// Journal of Quantitative Spectroscopy and Radiative Transfer, 2016, Vol. 178, pp. 284–294. doi:10.1016/j.jqsrt.2015.12.028

Radiation and electrical characteristics of ferrite-free closed-loop inductively-coupled low mercury pressure UV lamps of 375 mm in length and 120 mm in width were experimentally studied. Discharges were excited at a frequency of 1.7 MHz and lamp RF power, Рlamp = (95–170) W. It was in quartz closed-loop tubes of 16.6 mm in inner diam. and of 815 mm in length, in the mixture of mercury vapour (7 х 10–3 mm Hg) with Ar (0.7 and 1.0 mm Hg) and with the mixture of 30 % Ne + 70 % Ar (0,7 and 1,0 mm Hg). The 3-turn induction coil made from litz wire with a low specific linear resistance (ρw = 1.4 x 10–4 Ohm/cm) was disposed on the lamp surface along the closed-loop tube perimeter. In lamps with buffer gas pressure of 1,0 mm Hg, the increase of lamp power from 95 to 150 W caused the decrease of induction coil power losses, Pcoil, from (6–7) W to (3–4) W. Also in these lamps increased induction coil power efficiency, ƞcoil = 1 – Pcoil/Plamp, from 92 % to 97 % and lamp UV radiation (λ = 254 nm) generation efficiency, ƞe, 254, from 57 % to 66 %. The decrease of buffer gas pressure from 1.0 to 0.7 mm Hg caused the decrease of ƞe, 254 by (10–20)%.

1. Isupov M.V., Krotov S.V., Litvintzev A.Y., Ulanov I.M. An induction UV lamp. Light and Engineering, 2008. V16, #1, pp. 67–71. 2. Kobayashi S., Hatano A. High-intensity low-pressure electrodeless mercury-argon lamp for UV disinfection of wastewater. Journal of Water and Environment Technology, 2005. V3, #1, pp. 71–76. 3. Levchenko V.A., Popov O.A., Svitnev S.A., Starshinov P.V. Experimental research into the electrical and optical characteristics of electrodeless UV lamps of the transformer type. Light and Engineering, 2015. V23, #1, pp. 60–64. 4. Levchenko V.A., Popov O.A., Svitnev C.A., Starshinov P.V. Electrical and Radiation characteristics of a transformer type lamp with a discharge tube of 16.6 mm diameter. Light and Engineering, 2016. V24, #2, pp. 77–81. 5. Svitnev C.A., Popov O.A., Levchenko V.A., Starshinov P.V. Characteristics of low pressure ferrite-free inductive discharge. Part 2. Plasma radiation characteristics. [Kharakteristiki besferritnogo induktsionnogo razryada nizkogo davleniya. Chast 2. Izluchatelnye kharakteristiki plazmy]. Uspekhi prikladnoi fiziki, 2016. #4, pp. 372–384. 6. Karmazinov F.V., Kostyuchenko S.V., Kudryavtsev N.N., Hramenkov S.V. Ultra-violet technologies in the modern world: A collective monograph [Ultrafioletovye tekhnologii v sovremennom mire: Kollektivnaya monografiya]. Dolgoprudny: Intellekt Publishing House, 2012, 392 p. 7. Popov O.A., Chandler R.T. Ferrite–free high power electrodeless fluorescent lamp operated at a frequency of 160–1000 kHz. Plasma Sources Science and Technology, 2002. V11, #2, pp. 218–227. 8. Popov O.A., Nikiforova V.A. Ferrite-free inductively-coupled light source of 300–400 W power at the frequency of 200–400 kHz. [Induktsionnyi besferritnyi istochnik sveta moshchnoctyu 300–400 W na chastote 200–400 kHz]. MPEI Bulletin, 2010. #2, pp. 159–164. 9. Starshinov P.V., Popov O.A., Irkhin I.V., Levchenko V.A., Vasina V.N. Electrodeless UV lamp on the basis of low pressure mercury discharge in a closed non-ferrite tube. Light and Engineering, 2019. V27, #6, pp. 133–136. 10. Starshinov P.V., Popov O.A., Irkhin I.V., Vasina V.N., Levchenko V.A. Electrical and radiation characteristics of ferrite-free closed-loop inductively-coupled mercury discharge UV lamps [Elektricheckie i izluchatelnye kharakteristiki induktivnykh besferritnykh rtutnykh UF lamp v zamknutykh trubkakh]. MPEI Bulletin, 2019. #3, pp. 87–97. 11. Popov O.A. Research of inert gas pressure influence on characteristics of inductive fluorescent lamps. [Issledovanie vliyaniya davleniya inertnogo gaza na kharakteristiki induktsionnykh lyuminescentnykh lamp]. MPEI Bulletin, 2013. #3, pp. 76–84. 12. Ekaterina V. Lovlya and Oleg A. Popov. Power losses in RF inductor of ferrite-free closed-loop inductively-coupled low pressure mercury lamps. Light and Engineering, 2020. V27. (accepted for publication) 13. Reizer Yu.P. Physics of Gaseous Discharges [Fizika gazovogo razryada]. М.: Nauka, 1987, 592 p. 14. Hyo–Chang Lee, Seung Ju Oh, Chin–Wookn Chung. Experimental observation of the skin effect on plasma uniformity in inductively coupled plasmas with a radio frequency bias // Plasma Sources Sci. Technol, 2012. V21, #3, pp. 035003. 15. Nikiforova, V.A., Popov O.A. RF frequency and discharge current effects on plasma parameters radial distributions in the ferrite-free inductively-coupled discharge in the closed-loop tube [Vliyanie chastoty VCh polya i razryadnogo toka na radialnoe raspredelenie parametrov plazmy induktsionnogo besferritnogo razryada v zamknutoy trubke]. MPEI Bulletin, 2012. #1, pp. 108–114. 16. Aleksandrov A.F., Vavilin K.V., Kralkina E.A., Neklyudova P.A. and Pavlov V.B. Plasma parameters investigation of the RF inductive plasma source with diameter 46 cm. Part I. Plasma parameters in the skin layer [Issledovanie parametrov plazmy induktivnogo VCh istochnika plazmy diametrom 46 cm. Ч.I. Parametry plazmy v oblasti skin-sloya]. Applied Physics [Prikladnaya fizika], 2013. #5, pp. 34–37. 17. Svitnev C.A., Popov O.A., Levchenko V.A., Starshinov P.V. Characteristics of low pressure ferrite-free inductive discharge. Part 1. RF inductor electrical characteristics. [Kharakteristiki besferritnogo induktsionnogo razryada nizkogo davleniya. Chast 1. Elektricheskie kharakteristiki VCh induktora]. Uspekhi prikladnoi fiziki, 2016. #2, pp. 139–149.

There is still great interest in studying high intensity discharge (HID) lamps despite the great development of other light sources like light emitting diodes (LEDs). Basic equations and numerical formulations allow calculating important terms such as the net emission coefficient (NEC) that plays an important role in understanding the radiation behaviour of these lamps. These lamps are considered to be at high pressure and the produced plasma was found to be at local thermodynamic equilibrium (LTE). The volume of the lamp is meshed into small cells and the total number of cells represents a compromise between correct results and calculation time. Each cell has its own local absorption and emission coefficient that applies to its position in the discharge. Line profile is calculated by two profiles convolution: one is Lorentz’s and the second one is a quasi-static profile. Ray tracing technique is used to resolve the radiation transport for the visible and ultra violet (UV) spectrum. The NEC is thus calculated and compared with other models for a pure mercury discharge. In addition, additional photometric properties of the lamp are obtained.

1. Derra G., Moench H., Fischer E., Giese H., Hechtfischer U., Heusler G., Koerber A., Niemann U., Noertemann F.-C., Pekarski P., Pollmann-Retsch J., Ritz A., Weichmann U. UHP lamp systems for projection applications // Journal of Physics D: Applied Physics, 2005. V38, #3, pp. 2995.
2. Cressault Y., Teulet P., Zissis G. Radiative properties of ceramic metal-halide high intensity discharge lamps containing additives in argon plasma / / Japanese Journal of Applied Physics, 2016. V55, #7S2, pp. 07LB05.
3. Simonet F., Aubes M., Elloumi H., Sarroukh H. Optimization of the spectruml flux computation for cylindrical discharges // Journal of Quantitative Spectroscopy and Radiative Transfer, 1999. V61, #2, pp. 197.
4. Lochte-Holtegreven W. Plasma Diagnostics. North Holland Publishing Company, 1968.
5. Leibermann R.-W., Lowke, J.-J. Radiation emission coefficients for sulfur hexafluoride are plasmas // Journal of Quantitative Spectroscopy and Radiative Transfer, 1976. V16, #3, pp. 253.
6. Sevast’yanenko V.-G., Soloukhin R.-I., Golovnev I.-F., Zamurayev V.-P., Katsnel’son V.-P., Koval’skaya, G.-A., Goulard R. Radiative Heat Transfer in High Temperature Gases. Springer, 1987.
7. Lowke J.-J., Capriotti E.-R. Calculation of temperature profiles of high-pressure electric arc using the diffusion approximation for radiation transfer // Journal of Quantitative Spectroscopy and Radiative Transfer, 1969. V9, #2, pp. 207.
8. Stromberg H.-P., Schafer R. Time-dependent behaviour of high-pressure mercury discharges // Journal of Applied Physics, 1983. V54, #8, pp. 4338.
9. Jones B.-F., Mottram D.-A.-J. A semi-empirical formula to describe the net emission coefficient of self-absorbed spectruml lines for use in modeling high-pressure discharge lamps // Journal of Physics D: Applied Physics, 1981. V14, #7, pp. 1183.
10. Bouaoun M., Elloumi H., Charrada K., Rhouma B.-E.-H., Stambouli M. Discrete ordinates method in the analysisof the radiative transfer in high intensity discharge lamps // Journal of Physics D: Applied Physics, 2005. V38, #22, pp. 4053.
11. Hamady M., Lister G.-G., Zissis G. Calculations of visible radiation in electrodeless HID.
12. Lamps // Journal of Lighting Research and Technology, 2016. V48, #4, pp. 502.
13. Galvez M. Ray tracing model for radiation transport in three-dimensional LTE systems // Journal of Physics D: Applied Physics, 2005. V38, #17, pp. 3011.
14. Hamady M., Lister G.-G., Aubès M., Zissis G. Study of photometric properties of high-pressure mercury discharge wit thallium iodide additives (HgTlI) using the ray-tracing method // Journal of Physics D: Applied Physics, 2011. V44, #10, pp. 5201.

1. Narendran N., Gu Y. Life of LED-based white light sources. Journal of display technology, 2005. #1(1), 167 p.
2. Kocaman B., Rüstemli S. Comparison of LED and HPS luminaires in terms of energy savings at tunnel illumination. Light & Engineering, 2019. V27, #1, pp. 67–74.
3. Amelkina S.A., Zheleznikova O.E., Sinitsyna L.V. On the efficiency of lighting by LEDs in visual work. Light & Engineering, 2018. V26, #3, pp. 81–87.
4. Green R. J., Joshi H., Higgins M.D., Leeson M.S. Recent developments in indoor optical wireless systems. IET communications, 2008. V2, #1, pp. 3–10.
5. Gancarz J., Elgala H., Little TD. Impact of lighting requirements on VLC systems. IEEE Communications Magazine, 2013. V19, #51(12), pp. 34–41.
6. Chatterjee S., Sabui D. Daylight integrated indoor VLC architecture: An energy-efficient solution. Trans Emerging Tel Tech. 2019, e3800.
7. Markov M., Grigoriev Y.G. WI-FI technology–an uncontrolled global experiment on the health of mankind. Electromagnetic biology and medicine, 2013. V32, #2, pp. 200–208.
8. Miyahara S., Aono S., Matsumoto Y. Preproduction of LED driver for visible light communications and evaluation of response performance of visible LED. Technical report of IEICE, ICD2005–44, 2005. pp. 25–30.
9. O’Brien D. C., Faulkner G., Le Minh H., Bouchet O., El Tabach M., Wolf M., Langer K.D. Home access networks using optical wireless transmission. In 2008 IEEE19th International Symposium on Personal, Indoor and Mobile Radio Communications, IEEE, 2008, pp. 1–5.
10. Vučić J., Kottke C., Nerreter S., Langer K.D., Walewski J.W. 513 Mbit/s visible light communications link based on DMT-modulation of a white LED. Journal of lightwave technology, 2010. V28, #24, pp. 3512–3518.
11. McKendry J.J., Massoubre D., Zhang S., Rae B.R., Green R.P., Gu E., Dawson M.D. Visible-light communications using a CMOS-controlled micro-light-emittingdiode array. Journal of lightwave technology, 2011.V30, #1, pp. 61–67.
12. Elgala H., Mesleh R., Haas H. Indoor optical wireless communication: potential and state-of-the-art. IEEE Communications Magazine, 2011. V49, #9, pp. 56–62.
13. Sindhubala K., Vijayalakshmi B. Survey on noise sources and restrain techniques in visible-light communication. Light & Engineering, 2016. V24, #2, pp. 107–117.
14. Sindhubala K., Vijayalakshmi B. Design and implementation of optical receiver for visible light communication to reduce ambient light noise. Light & Engineering, 2017. V25, #2, pp. 139–146.
15. Din I., Kim H. Energy-efficient optical power control for data rate and illuminance provision in visible light communication. Light & Engineering, 2016. V24, #2, pp. 89–95.
16. Ho S. W., Duan J., Chen, C.S. Location‐based information transmission systems using visible light communications. Transactions on Emerging Telecommunications Technologies, 2017. V28, #1, e2922.
17. ISO-8995–1:2002 (CIE-S008/E:2001) Lighting of work places – Part 1: Indoor
18. Kahn J. M., Barry J.R. Wireless infrared communications. Proceedings of the IEEE, 1997. V85, #2, pp. 265–298.
19. Chen Y., Sung C.W., Ho S.W., Wong W.S. BER analysis and power control for interfering visible light communication systems. Optik, 2017. V151, pp. 98–109.
20. Afgani M. Z., Haas H., Elgala H., Knipp D. Visible light communication using OFDM. In 2nd International Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities, TRIDENTCOM, IEEE, 2006. 6 p.
21. Gfeller F. R., Bapst U. Wireless in-house data communication via diffuse infrared radiation. Proceedings of the IEEE, 1979. V67, #11, pp. 1474–1486.
22. Komine T., Nakagawa M. Fundamental analysis for visible-light communication system using LED lights. IEEE transactions on Consumer Electronics, 2004. V50, #1, pp. 100–107.
23. Texas Instruments, “60-W Common Anode-Capable Constant Current Buck LED Driver”, LM3414, LM3414HV datasheet, June 2010 [Revised November 2015].
24. Moreira A.J., Valadas R.T., de Oliveira Duarte A.M. Optical interference produced by artificial light. Wireless Networks, 1997. V3, #2, pp. 131–40.
25. Keiser G. Optical fiber communications. Wiley Encyclopedia of Telecommunications, 2003. Apr. 15.