Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521148
K. Wandachowicz, M. Przybyła
The luminance method applied while assessing the quality of lighting for the roads, mainly for motor traffic, with movement speed ranging from average to high, was described in this article. The main part of the article refers to the issue of taking measurements of luminance distribution on the roads. The measurements taken on the expressway were presented and probable causes of differences between the results of the project and results of the measurements were described.
{"title":"The Measurements of the Parameters of Road Lighting - Theory and Practice","authors":"K. Wandachowicz, M. Przybyła","doi":"10.1109/LUMENV.2018.8521148","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521148","url":null,"abstract":"The luminance method applied while assessing the quality of lighting for the roads, mainly for motor traffic, with movement speed ranging from average to high, was described in this article. The main part of the article refers to the issue of taking measurements of luminance distribution on the roads. The measurements taken on the expressway were presented and probable causes of differences between the results of the project and results of the measurements were described.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122168913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521072
Martin Motyčka, J. Skoda, Jaroslav Štěpánek, J. Nekvapil
This article has task to inform a reader about uncertainties of measurement of spectroradiometric systems with double monochromator. Uncertainty of measurement is very important for all photometric measurements and calculations. Spectroradiometric system's uncertainty is dependent on wavelength and it is difficult to estimate uncertainty of measurement for photometric parameters calculated from measured spectrum. In the first part of this article there is theory necessary for understanding uncertainty analyses and description of construction of spectroradiometric system with double monochromator. In the second part there is practical uncertainty analysis of double monochromator in light laboratory and its results.
{"title":"The Uncertainty of Measurement of Spectroradiometric System with Double Monochromator","authors":"Martin Motyčka, J. Skoda, Jaroslav Štěpánek, J. Nekvapil","doi":"10.1109/LUMENV.2018.8521072","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521072","url":null,"abstract":"This article has task to inform a reader about uncertainties of measurement of spectroradiometric systems with double monochromator. Uncertainty of measurement is very important for all photometric measurements and calculations. Spectroradiometric system's uncertainty is dependent on wavelength and it is difficult to estimate uncertainty of measurement for photometric parameters calculated from measured spectrum. In the first part of this article there is theory necessary for understanding uncertainty analyses and description of construction of spectroradiometric system with double monochromator. In the second part there is practical uncertainty analysis of double monochromator in light laboratory and its results.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132115302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521083
S. Słomiński
The last decade is the time of a very dynamic development of lighting technology. This development covers many areas that complement each other. The development of light sources, luminaires, measurement techniques and design methods make it necessary to develop new, effective tools to support the design and analysis of lighting equipment. In lighting technology, the most common analysis is made of such parameters as the illuminance, luminance distribution and discomfort glare, inseparable from the specificity of modern light sources. A characteristic feature of almost all of them is high luminance, on the level of 107- 108cd/m2. High luminance facilitates the design of very precise optical systems, but also it is strongly associated with the possibility of discomfort associated with glare. Current methods of glare analysis in simulation software are related to conversion to the average luminance value of the luminaire, saved as simplified light parameters in electronic files (IES, LDT or similar). Currently the calculations take place as a result of calculation ratio the value of luminous intensity in a given direction and the surface area of the dimension of the luminaires in the same direction. This can lead to a significant understatement of the luminance of the luminaire in any situation where luminous intensity comes from the heterogeneous luminance distribution on the surface of the luminaire. This situation most often occurs in luminaires with high-luminance light sources with a reflector system and in the case of multi-source luminaires with lenses - eg multi-LED luminaires. The paper presents advanced methods of luminance modelling of light sources developed as a result of digital measurements of luminance distributions. A comparative analysis of the accuracy of the simulation calculations of the analytical lighting fixture model will be presented. The results will be compared to the classic ray tracing methods used in currently used models.
{"title":"Advanced Luminance Modeling of Light Sources for Simulation and Computational Purposes of Lighting Parameters","authors":"S. Słomiński","doi":"10.1109/LUMENV.2018.8521083","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521083","url":null,"abstract":"The last decade is the time of a very dynamic development of lighting technology. This development covers many areas that complement each other. The development of light sources, luminaires, measurement techniques and design methods make it necessary to develop new, effective tools to support the design and analysis of lighting equipment. In lighting technology, the most common analysis is made of such parameters as the illuminance, luminance distribution and discomfort glare, inseparable from the specificity of modern light sources. A characteristic feature of almost all of them is high luminance, on the level of 107- 108cd/m2. High luminance facilitates the design of very precise optical systems, but also it is strongly associated with the possibility of discomfort associated with glare. Current methods of glare analysis in simulation software are related to conversion to the average luminance value of the luminaire, saved as simplified light parameters in electronic files (IES, LDT or similar). Currently the calculations take place as a result of calculation ratio the value of luminous intensity in a given direction and the surface area of the dimension of the luminaires in the same direction. This can lead to a significant understatement of the luminance of the luminaire in any situation where luminous intensity comes from the heterogeneous luminance distribution on the surface of the luminaire. This situation most often occurs in luminaires with high-luminance light sources with a reflector system and in the case of multi-source luminaires with lenses - eg multi-LED luminaires. The paper presents advanced methods of luminance modelling of light sources developed as a result of digital measurements of luminance distributions. A comparative analysis of the accuracy of the simulation calculations of the analytical lighting fixture model will be presented. The results will be compared to the classic ray tracing methods used in currently used models.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115622396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521005
J. Raditschová, D. Gašparovský
Contemporary lighting systems are unconditionally based on Solid State Lighting incorporating the newest LED technology. Where older lighting systems are in operation, the fastest way how to increase the energy performance, to save costs for lighting energy and to enhance various quality features of lighting is to apply retrofit LED lamps as replacement for other lamp types in existing luminaires. This measure is not free of shortcomings although due to marketing reasons disadvantages are not highlighted. This paper aims to give an overview of the LED retrofits most widely used in interior lighting and to highlight their key technical parameters in comparison to lamps they are replacing. Parameters and features of LED retrofits will be critically analyzed, including the comparison of operational costs and calculation of the real cost benefits of the LED retrofits.
{"title":"Critical Analysis of Cost Benefits of LED Retrofits in Indoor Lighting","authors":"J. Raditschová, D. Gašparovský","doi":"10.1109/LUMENV.2018.8521005","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521005","url":null,"abstract":"Contemporary lighting systems are unconditionally based on Solid State Lighting incorporating the newest LED technology. Where older lighting systems are in operation, the fastest way how to increase the energy performance, to save costs for lighting energy and to enhance various quality features of lighting is to apply retrofit LED lamps as replacement for other lamp types in existing luminaires. This measure is not free of shortcomings although due to marketing reasons disadvantages are not highlighted. This paper aims to give an overview of the LED retrofits most widely used in interior lighting and to highlight their key technical parameters in comparison to lamps they are replacing. Parameters and features of LED retrofits will be critically analyzed, including the comparison of operational costs and calculation of the real cost benefits of the LED retrofits.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123869489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521023
P. Pracki
Luminous intensity distribution of luminaires influences the qualitative metrics of lighting. Direct lighting is the most common way of illumination in public interiors. Thus, its application should be carefully considered. For defined luminous intensity distributions of direct lighting luminaires and their layouts, in rooms with various sizes and reflectances, the ceiling and wall illuminance ratios, and UGR values were calculated and analysed in detail. Meeting the recommendations for ceiling and wall illumination, and discomfort glare were checked. Impact of luminous intensity distribution of the direct lighting luminaires on ceiling and wall illumination, and discomfort glare was assessed. Impact of room size and reflectances on ceiling and wall illumination, and discomfort glare was also observed. Substantial limitation of the direct lighting luminaires for general illumination in interiors was demonstrated and it should be regarded with great concern if visual comfort for people in interiors is to be provided.
{"title":"Impact of Direct Lighting Luminaires' Luminous Intensity Distribution on Lighting Quality in Interiors","authors":"P. Pracki","doi":"10.1109/LUMENV.2018.8521023","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521023","url":null,"abstract":"Luminous intensity distribution of luminaires influences the qualitative metrics of lighting. Direct lighting is the most common way of illumination in public interiors. Thus, its application should be carefully considered. For defined luminous intensity distributions of direct lighting luminaires and their layouts, in rooms with various sizes and reflectances, the ceiling and wall illuminance ratios, and UGR values were calculated and analysed in detail. Meeting the recommendations for ceiling and wall illumination, and discomfort glare were checked. Impact of luminous intensity distribution of the direct lighting luminaires on ceiling and wall illumination, and discomfort glare was assessed. Impact of room size and reflectances on ceiling and wall illumination, and discomfort glare was also observed. Substantial limitation of the direct lighting luminaires for general illumination in interiors was demonstrated and it should be regarded with great concern if visual comfort for people in interiors is to be provided.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125304776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521037
L. Balázs, József Nádas
In this paper we analyze the trade-off between color quality and luminous efficacy of hybrid LED systems. The color rendering index of white phosphor LED based light sources is limited to Ra = 80+ in the majority of current market applications. Color-mixed hybrid systems incorporating white phosphor LEDs and monochromatic red LEDs can significantly improve the color quality of the light sources. We present the dependence of major color quality metrics (CIE Ra, CQS, and color fidelity and color gamut index of the IES TM-30-15) as a function of the luminous efficacy of radiation calculated for color tuned hybrid LED systems. Improved color quality and color tunability make hybrid LED systems more competitive in the market as luminous efficacy of light emitting diodes is increasing further.
{"title":"Color Quality of Hybrid LED Systems","authors":"L. Balázs, József Nádas","doi":"10.1109/LUMENV.2018.8521037","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521037","url":null,"abstract":"In this paper we analyze the trade-off between color quality and luminous efficacy of hybrid LED systems. The color rendering index of white phosphor LED based light sources is limited to Ra = 80+ in the majority of current market applications. Color-mixed hybrid systems incorporating white phosphor LEDs and monochromatic red LEDs can significantly improve the color quality of the light sources. We present the dependence of major color quality metrics (CIE Ra, CQS, and color fidelity and color gamut index of the IES TM-30-15) as a function of the luminous efficacy of radiation calculated for color tuned hybrid LED systems. Improved color quality and color tunability make hybrid LED systems more competitive in the market as luminous efficacy of light emitting diodes is increasing further.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125067862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521078
Marek Mokráň, L. Lipnický
At present, there are lights on the market that are capable of emitting white light with an adjustable correlated color temperature. The advantage of these luminaires is the possibility of changing the correlated color temperature, for example, due to a change in the function of the room in which they are installed, with no replacement of the lamps. The disadvantage of such a correlated color temperature setting is that this setting is performed directly on the luminaire and it is not possible to set the correlated color temperature with the control system. When changing the color temperature, in most cases, it is undesirable to change the other photometric parameters. In this paper, attention is paid to changes of the photometric parameters caused by changing the correlated color temperature.
{"title":"Photometric Parameters of LED Luminaires with Switchable Correlated Colour Temperature","authors":"Marek Mokráň, L. Lipnický","doi":"10.1109/LUMENV.2018.8521078","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521078","url":null,"abstract":"At present, there are lights on the market that are capable of emitting white light with an adjustable correlated color temperature. The advantage of these luminaires is the possibility of changing the correlated color temperature, for example, due to a change in the function of the room in which they are installed, with no replacement of the lamps. The disadvantage of such a correlated color temperature setting is that this setting is performed directly on the luminaire and it is not possible to set the correlated color temperature with the control system. When changing the color temperature, in most cases, it is undesirable to change the other photometric parameters. In this paper, attention is paid to changes of the photometric parameters caused by changing the correlated color temperature.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130152783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521128
M. Sielachowska, D. Tyniecki, M. Zajkowski
The dynamic development of cities is associated with a significant increase in the luminance of architectural buildings, advertisements or usable spaces. Objects that emit a significant amount of luminous flux to the environment are also various types of sports buildings, such as city stadiums, football pitches or tennis courts. The need to protect the environment determinates the need to reduce and prevent the effect of light pollution. The article analyzes the possibilities of using unmanned aerial vehicles to assess light pollution by measuring the distribution of luminous flux emitted by sports facilities. The method of light measurement based on a goniometric system using unmanned aerial vehicles was presented and their positioning in three-dimensional space was taken into account. A method for controlling the photometric probe and calibrating the measurement system has been proposed.
{"title":"The Measurement Method of Light Distribution Emitted from Sports Facilities Using Unmanned Aerial Vehicles","authors":"M. Sielachowska, D. Tyniecki, M. Zajkowski","doi":"10.1109/LUMENV.2018.8521128","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521128","url":null,"abstract":"The dynamic development of cities is associated with a significant increase in the luminance of architectural buildings, advertisements or usable spaces. Objects that emit a significant amount of luminous flux to the environment are also various types of sports buildings, such as city stadiums, football pitches or tennis courts. The need to protect the environment determinates the need to reduce and prevent the effect of light pollution. The article analyzes the possibilities of using unmanned aerial vehicles to assess light pollution by measuring the distribution of luminous flux emitted by sports facilities. The method of light measurement based on a goniometric system using unmanned aerial vehicles was presented and their positioning in three-dimensional space was taken into account. A method for controlling the photometric probe and calibrating the measurement system has been proposed.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129105383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8520963
F. Kundracik, M. Kocifaj
The Slovak research team has developed a unique theoretical solution and an efficient software module for the calculation of the parameters of the light pollution in the dependence on current meteorological situation and the properties of light sources in the analysed region. The module is based on a smart algorithm that is able to do real-time calculations. In the comparison to alternative products it is ca 10 times faster at the same precision. This is one of the reasons why SkyGlow became the key tool for the prediction of the skyglow distribution under conditions where other solutions failed due to unacceptable demands on the computing power. SkyGlow was proved to be the only software module applicable in urban environment having high density and variability of light sources. In cooperation with Dark Sky Association and with representatives of the city of Tucson (U.S.) it was used for the forecast of changes in the diffuse light levels over Tucson after the extensive reconstruction of the public lighting system. SkyGlow solution was the basis for the judgment of the possible impacts of LED conversion in cities in U.S. (in charge of US Department of Energy and Pacific Northwest National Laboratory. This paper deals with the analysis of main results achieved by the modelling of the diffuse light levels of the night sky over Tucson and by utilizing terrestrial and satellite data. Experimental observations are also presented and analysed. The paper also shows the way how described methods can be used at the evaluation of possible changes in light pollution in other regions (including Czech Republic and Slovakia).
{"title":"SkyGlow Model Successfully Applied to the Evaluation of the Light Pollution over Tucson, U.S.","authors":"F. Kundracik, M. Kocifaj","doi":"10.1109/LUMENV.2018.8520963","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8520963","url":null,"abstract":"The Slovak research team has developed a unique theoretical solution and an efficient software module for the calculation of the parameters of the light pollution in the dependence on current meteorological situation and the properties of light sources in the analysed region. The module is based on a smart algorithm that is able to do real-time calculations. In the comparison to alternative products it is ca 10 times faster at the same precision. This is one of the reasons why SkyGlow became the key tool for the prediction of the skyglow distribution under conditions where other solutions failed due to unacceptable demands on the computing power. SkyGlow was proved to be the only software module applicable in urban environment having high density and variability of light sources. In cooperation with Dark Sky Association and with representatives of the city of Tucson (U.S.) it was used for the forecast of changes in the diffuse light levels over Tucson after the extensive reconstruction of the public lighting system. SkyGlow solution was the basis for the judgment of the possible impacts of LED conversion in cities in U.S. (in charge of US Department of Energy and Pacific Northwest National Laboratory. This paper deals with the analysis of main results achieved by the modelling of the diffuse light levels of the night sky over Tucson and by utilizing terrestrial and satellite data. Experimental observations are also presented and analysed. The paper also shows the way how described methods can be used at the evaluation of possible changes in light pollution in other regions (including Czech Republic and Slovakia).","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132290373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8521038
R. Krupiński
Photorealistic computer simulations are now a popular method of lighting design. They are usually associated with the illumination of objects, but they are also successfully used in interior lighting, especially representative lighting. The problem of the verifiability of the tool is often discussed and in which cases only visualization without purely analytical calculations can be used to evaluate the lighting design. The article presents both subjective and objective studies of conformity of a project made using photorealistic visualization and its subsequent implementation. Subjectively it means based on the comparison of simulation images made with different accuracy, with post-implementation photographs of these projects, objectively - on the basis of measurements of the luminance of the completed project and their reference to distributions previously generated by computer. The field measurements carried out as well as surveys have clearly shown that computer simulations in the form of raster images are a reliable design tool in the hands of a lighting designer. The future of the lighting design is also presented.
{"title":"Evaluation of Lighting Design Based on Computer Simulation","authors":"R. Krupiński","doi":"10.1109/LUMENV.2018.8521038","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521038","url":null,"abstract":"Photorealistic computer simulations are now a popular method of lighting design. They are usually associated with the illumination of objects, but they are also successfully used in interior lighting, especially representative lighting. The problem of the verifiability of the tool is often discussed and in which cases only visualization without purely analytical calculations can be used to evaluate the lighting design. The article presents both subjective and objective studies of conformity of a project made using photorealistic visualization and its subsequent implementation. Subjectively it means based on the comparison of simulation images made with different accuracy, with post-implementation photographs of these projects, objectively - on the basis of measurements of the luminance of the completed project and their reference to distributions previously generated by computer. The field measurements carried out as well as surveys have clearly shown that computer simulations in the form of raster images are a reliable design tool in the hands of a lighting designer. The future of the lighting design is also presented.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130787835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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