Vladimir I. Polyakov and Dmitry S. Strebkov
Matrix solar cells for Conversion of Concentrated Radiation

Andreas Ludwig
The Challenge is the Balance The Lighting Industry’s View on Energy Effi ciency and Lighting Quality

Andrey V. Aladov, Elena D. Vasilieva, Alexander L. Zakgeim, Gregory V. Itkinson, Vsevolod V. Lundin, Mikhail N. Mizerov, Victor M. Ustinov, and Andrey F. Tsatsul’nikov
On Modern High-Power LEDs and their Lighting Application

Peter Dehoff
Quality Criteria as Part of the European Standardization – the Revision of EN 12464–1 “Lighting of Interior Workplaces”

Zoltán Vas, Peter Bodrogi, János Schanda, and Géza Varady
The Non-Additivity Phenomenon in Mesopic Photometry

Monica Säter
User Responses to LED as a Guide for Energy Effi cient Lighting Applications in Domestic Environments

Julian B. Aizenberg, Gennadiy B. Bukhman, Alexei A. Korobko, and Vladimir M. Pyatigorskiy
Several not embodied concepts of optical schemes and lighting systems with hollow light guides

Nicolai I. Shchepetkov
Topical Light Design for Classical Architecture

Roger Narboni
From Light Urbanism to Nocturnal Urbanism

Elena V. Barchugova and Nataliya A. Rochegova
Video Mapping from Presentation to Architecture vVladimir P. Budak and Tatyana V. Meshkova
Models of Visual Discomfort from Sources of Glare

Egor E. Nilov and Vitaly N. Stepanov
Illumination Design: Problems of Translation and Criteria of Evaluation

Giovanni Ciampi, Antonio Rosato, Michelangelo Scorpio, and Sergio Sibilio
Basic System for the Preliminary Experimental Photometric Characterization of a LED Based Luminaire

Alexander. T. Ovcharov and Yury N. Selyanin
Solatube® Technology: Prospective Applications in Architecture and Building in Russia

Rajesh Sarkar and Saswati Mazumdar
Studies and Experiments for Determination of Degradation of Paintings in Museum Art Galleries Caused by Artificial Light Sources

Nikolai V. Matveev, Victor T. Prokopenko, Natalia P. Sapunova, and Daniil A. Friedman
Research into the Influence of Light-Music Performances on Psychophysiological States

Hongyi Cai and Linjie Li
How LED Lighting May Affect Office Ergonomics: The Impact of Providing Access to Continuous Dimming Controls on Typing and Colour-Matching Tasks Performance

Svetlana M. Lebedkova and Yuliya A. Lusina
Research into the “Colouring” Effect Using Different Spectral Radiations

Chao-Ming FU
An Interview with professor Chao-Ming Fu at LED Forum 2015 vPeter Bodrogi, Tran Quoc Khanh, D. Stojanovic, and Yandan Lin
Intercultural Colour Temperature Preference of Chinese and European Subjects Living in Germany

Can Cengiz, Mikko Maksimainen, Marjukka Puolakka, and Liisa Halonen
The Effects of High Luminance Objects on Peripheral Target Detection in Mesopic Conditions

Natalya V. Bystryantseva, Yelena I. Lekus, and Nikolai V. Matveev
The Domestic School of Light Design: Strategy and Tactics

Yuliya Revsina and Dmitry Shvidkovsky
Illumination of Classical Architecture Memorials in Search of Authenticity

Sergei A. Aleksandrov
Sports Illumination of Ski Tracks in the Territory of the Rosa Khutor Freestyle Centre

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.

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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.

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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.

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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)%.

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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.

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1. Narendran N., Gu Y. Life of LED-based white light sources. Journal of display technology, 2005. #1(1), 167 p.
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Roger Narboni
Lighting Public Spaces: New Trends and Future Evolutions

Elena A. Zaeva-Burdonskaya and Yuri V. Nazarov
Stage in the Spotlight and Paradoxes of the Profession: Artist, Light, Theatre

Aslıhan Çevik, Tuğçe Kazanasmaz, and Hasan Engin Duran
User Lighting Preferences Based on Navigation and Space Quality in Virtual Exhibition Environments

Alexandra A. Bartseva, George V. Boos, Anatoly Sh. Chernyak, Alyona B. Kuznetsova, and Eugene I. Rozovsky
The State of Museum Lighting in Russia

Alexander E. Guliev
Improvement of Majolica Lighting at the Komsomolskaya – Radial Metro Station

Alexei I. Sterkhov, Alexander V. Palagin, and Igor Yu. Loshkarev
Study of Lighting Systems with Extended Hollow Light Guides

Alexander V. Leonidov
Changes in Irradiance and Illuminance on Earth Surface during 11-Year Solar Activity Cycle

Roger Narboni
Lighting Public Spaces: New Trends and Future Evolutions

Elena A. Zaeva-Burdonskaya and Yuri V. Nazarov
Stage in the Spotlight and Paradoxes of the Profession: Artist, Light, Theatre

Aslıhan Çevik, Tuğçe Kazanasmaz, and Hasan Engin Duran
User Lighting Preferences Based on Navigation and Space Quality in Virtual Exhibition Environments

Alexandra A. Bartseva, George V. Boos, Anatoly Sh. Chernyak, Alyona B. Kuznetsova, and Eugene I. Rozovsky
The State of Museum Lighting in Russia

Alexander E. Guliev
Improvement of Majolica Lighting at the Komsomolskaya – Radial Metro Station

Alexei I. Sterkhov, Alexander V. Palagin, and Igor Yu. Loshkarev
Study of Lighting Systems with Extended Hollow Light Guides

Alexander V. Leonidov
Changes in Irradiance and Illuminance on Earth Surface during 11-Year Solar Activity Cycle

Nowadays, the lighting designer is becoming one of the leading figures in forming of the concept of theatrical scene design. Lighting technologies with great potential of illumination, colour and graphic capabilities allowed the profession to occupy the leading positions in the space of any object. Today’s orientation of the whole visual culture to staginess alongside with avant-garde inventions of stage designers in the early 20th century have formed the main artistic trends of this art. Nowadays, the modernistic findings of the past are supplemented by innovative multimedia technologies. Visual techniques worked out in stage shows have  seriously affected the people’s attitude towards the  stage space. They have made theatrical performance very dynamic by using lighting and media effects,  sufficiently widened the scope of visual and expressive abilities of an artist.
The new paradigm of light as an active tool of form-making allowed modelling the space by means of lighting technologies. Stage light has become a form possessing great emotional power inseparably associated with the dramatic composition of performance. At the same time, the goal of a lighting designer cooperating with theatre designers and costume designers should permanently lead the audience to catharsis and innovative light engineering techniques play a great role in it. Naturally, such innovations in theatre art made it necessary to correct the programmes of training of universal specialists required in this area. Professional education of a theatre lighting designer, apart from knowledge of technology and basics of scenography, requires serious artistic training.
The methodological experience obtained in scenography training of future designers in the Environment Design sub-department of S.G. Stroganov MGHPA may provide an example of new design approaches to solving of comprehensive problems of scenography. Design training techniques used in the  sub-department include the method of environmental approach, the method of script modelling using a virtual design model and the method of conceptual design.

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