Pub Date : 2018-09-01DOI: 10.1109/LUMENV.2018.8520975
Piotr Jakubowski, J. Kowalska, Robert Supronowicz, I. Fryc
The article presents quantities which are describing light sources color quality and their impact on human body nonvisual effect. Based on spectral power distributions data of three fluorescent lamps, measured by independent laboratories, the paper verified how such measurements differences could influents calculated based on them color and melanopic quantities. The results showed that for the color quality indices there is no significant influences of inter-laboratory variations in spectral power distribution. Additionally the SPDs measurement uncertainty with negligible value affected the calculated melanopic irradiance.
{"title":"The Influence of Spectral Measurements Uncertainty of Fluorescent Lamps on Calculated Value of Their Relative Melanopic Weighted Irradiance and Colour Quality Parameters","authors":"Piotr Jakubowski, J. Kowalska, Robert Supronowicz, I. Fryc","doi":"10.1109/LUMENV.2018.8520975","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8520975","url":null,"abstract":"The article presents quantities which are describing light sources color quality and their impact on human body nonvisual effect. Based on spectral power distributions data of three fluorescent lamps, measured by independent laboratories, the paper verified how such measurements differences could influents calculated based on them color and melanopic quantities. The results showed that for the color quality indices there is no significant influences of inter-laboratory variations in spectral power distribution. Additionally the SPDs measurement uncertainty with negligible value affected the calculated melanopic irradiance.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"518 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":"116238688","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.2018.8521136
S. Słomiński
The number of high luminance light sources commonly used in lighting technology is systematically growing, causing an increase in number of potential problems. One of them is the problem of discomfort glare and ways to measure it. Both calculation and measurement methods connected with this parameter have a series of disadvantages and advantages. Among the serious disadvantages, there can be dominant digital “models” of light sources and luminaires, which do not include, practically, any direct information on luminance distribution. To make the measurement results correspond to the calculation results, computer simulations and visual impression of the people assessing the lighting, the measuring devices should correctly record the analyzed parameters. The accurate parameters recording means the situation under which the measurement result is possibly close to what the human eye records. The modern measurement systems, among which there are undoubtedly ILMDs - Imaging luminance measuring devices, are potentially ideal to record all parameters used to calculate glare. Research done by the author proves that especially as far as the small light sources are concerned, such as LEDs and multi-source luminaire systems the parameters of the equipment used have a big influence on the measurement results. Especially, an angular field of view of single pixel of the digital sensor, which relates to a CCD or CMOS sensor size, dimensions of single photo-cell, focal length and technology that is used to make this device (B/W, color). A problem of the influence of depth of field of digital recording equipment with respect to the measured luminance values was dealt with. In this paper and presentation, the relationships of ILMD parameters, such as a field of view of a given type of sensor and single photo-element, including the used lens, will be presented.
{"title":"Typical Causes of Errors During Measuring Luminance Distributions in Relation to Glare Calculations","authors":"S. Słomiński","doi":"10.1109/LUMENV.2018.8521136","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521136","url":null,"abstract":"The number of high luminance light sources commonly used in lighting technology is systematically growing, causing an increase in number of potential problems. One of them is the problem of discomfort glare and ways to measure it. Both calculation and measurement methods connected with this parameter have a series of disadvantages and advantages. Among the serious disadvantages, there can be dominant digital “models” of light sources and luminaires, which do not include, practically, any direct information on luminance distribution. To make the measurement results correspond to the calculation results, computer simulations and visual impression of the people assessing the lighting, the measuring devices should correctly record the analyzed parameters. The accurate parameters recording means the situation under which the measurement result is possibly close to what the human eye records. The modern measurement systems, among which there are undoubtedly ILMDs - Imaging luminance measuring devices, are potentially ideal to record all parameters used to calculate glare. Research done by the author proves that especially as far as the small light sources are concerned, such as LEDs and multi-source luminaire systems the parameters of the equipment used have a big influence on the measurement results. Especially, an angular field of view of single pixel of the digital sensor, which relates to a CCD or CMOS sensor size, dimensions of single photo-cell, focal length and technology that is used to make this device (B/W, color). A problem of the influence of depth of field of digital recording equipment with respect to the measured luminance values was dealt with. In this paper and presentation, the relationships of ILMD parameters, such as a field of view of a given type of sensor and single photo-element, including the used lens, will be presented.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"9 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":"124028805","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.2018.8521002
Mikuláš Parma, P. Baxant
Periodically change of light and darkness, as well as different duration of these two states induce in plant a lot of metabolic and morphologic reactions. The plants dispose of specific receptors for receiving radiation signals. The most effective part of electromagnetic radiation in term of plant growing is red part of light spectrum especially wavelengths 660 and 730 nm, then blue light with absorption maximums 370, 450 and 470 nm. Growth active is often UV radiation too, namely UV-A (320 - 380 nm), UV-B (280 - 320 nm) and green light (500 - 600 nm). It was developed modular LED fixture which allows dynamic change of spectral power distribution of light source based on specific requirements resulted during study of plant physiology. The LED fixture is controlled and programmable via PC.
{"title":"Experimental LED Luminaire and Its Usage at Study of Plant Physiology","authors":"Mikuláš Parma, P. Baxant","doi":"10.1109/LUMENV.2018.8521002","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521002","url":null,"abstract":"Periodically change of light and darkness, as well as different duration of these two states induce in plant a lot of metabolic and morphologic reactions. The plants dispose of specific receptors for receiving radiation signals. The most effective part of electromagnetic radiation in term of plant growing is red part of light spectrum especially wavelengths 660 and 730 nm, then blue light with absorption maximums 370, 450 and 470 nm. Growth active is often UV radiation too, namely UV-A (320 - 380 nm), UV-B (280 - 320 nm) and green light (500 - 600 nm). It was developed modular LED fixture which allows dynamic change of spectral power distribution of light source based on specific requirements resulted during study of plant physiology. The LED fixture is controlled and programmable via PC.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"39 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":"124565471","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.2018.8521146
S. Darula, R. Kittler
Nowadays daylight apertures in buildings are designed on the bases of overcast sky conditions in wintertime in Slovakia and Czech Republic. The criterion is the relative value of the Daylight Factor in its average 0.9% in two reference points in the middle depth of the room. Commonly, in practice as a consequence are designed windows roughly 1.5 - 1.7 m high in living rooms. The proposed European standard FprEN17037 is introducing a new criterion median exterior horizontal illuminance with the required indoor illuminance 300 lx in the middle of the room depth or 100 lx as minimum close to the rear wall. This study discusses problems of the design of window size in residential buildings and consequences of the new median criterion as well as the required interior illuminance in absolute lux values.
{"title":"The Window Size in Residential House Facades After the Current and New CEN Standard","authors":"S. Darula, R. Kittler","doi":"10.1109/LUMENV.2018.8521146","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521146","url":null,"abstract":"Nowadays daylight apertures in buildings are designed on the bases of overcast sky conditions in wintertime in Slovakia and Czech Republic. The criterion is the relative value of the Daylight Factor in its average 0.9% in two reference points in the middle depth of the room. Commonly, in practice as a consequence are designed windows roughly 1.5 - 1.7 m high in living rooms. The proposed European standard FprEN17037 is introducing a new criterion median exterior horizontal illuminance with the required indoor illuminance 300 lx in the middle of the room depth or 100 lx as minimum close to the rear wall. This study discusses problems of the design of window size in residential buildings and consequences of the new median criterion as well as the required interior illuminance in absolute lux values.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"327 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":"128914138","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.2018.8521032
L. Maierová
Impact of artificial light at night on sleep and health of humans and other living species is discussed among scientists. This paper analyses the properties of several commercially available light sources with regards to their effects on wildlife, human sleep, and health. A novel, environmentally considerate LED light source is introduced. Further, integration of this light source into the pilot biodynamic street lighting system is described. Based on the season and time of day, a control system changes the spectral composition of the light in order to provide healthy, sustainable lighting without compromising on safety, psychological needs or energy savings.
{"title":"Public Lighting, Public Health","authors":"L. Maierová","doi":"10.1109/LUMENV.2018.8521032","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521032","url":null,"abstract":"Impact of artificial light at night on sleep and health of humans and other living species is discussed among scientists. This paper analyses the properties of several commercially available light sources with regards to their effects on wildlife, human sleep, and health. A novel, environmentally considerate LED light source is introduced. Further, integration of this light source into the pilot biodynamic street lighting system is described. Based on the season and time of day, a control system changes the spectral composition of the light in order to provide healthy, sustainable lighting without compromising on safety, psychological needs or energy savings.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"159 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":"132186527","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/bigdataservice.2018.00007
C. Haase, Mario Kummer, Daniele Agostini, HU Berlin, Omid Amini, Alexander Bobenko, F. Cucker, J. Draisma, U. Bern, M. Drton
{"title":"Conference Organizers","authors":"C. Haase, Mario Kummer, Daniele Agostini, HU Berlin, Omid Amini, Alexander Bobenko, F. Cucker, J. Draisma, U. Bern, M. Drton","doi":"10.1109/bigdataservice.2018.00007","DOIUrl":"https://doi.org/10.1109/bigdataservice.2018.00007","url":null,"abstract":"","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":"130815076","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.2018.8520965
M. Smíd, P. Kliment, P. Linduška
Luminous flux (1m) and active electrical power consumption (W) of new SSL products coming to market are measured at test laboratories in order to determine the luminous efficacy (Im/W) and energy class of the products. Due to the fact that spectral responsivities of V(A)-filtered photometers differ from the defined CIE V(λ) curve, all photometers are typically calibrated using incandescent light with correlated colour temperature (CCT) of 2856 K. This causes unwanted spectral errors in the measurements of SSL products at test laboratories and also in the field due to the large differences in the spectra of calibration sources and the light being measured, and in many cases cannot be corrected for. The EMPIR (European Metrology Programme for Innovation and Research) project 15SIB07 PhotoLED addresses the obsolescence of traditional incandescent standard lamp technology used in photometry and the need to support the introduction and uptake of solid-state lighting (SSL) products. It develops and validates the basis for a new photometric system based on white LEDs, by developing new LED-based calibration sources and measurement techniques supporting the specific properties of the new light sources and detector technology including illuminance measurement of the new LED-sources without optical V(A)-filters in the calibration of photometers and measurement facilities used for determining the energy efficiency of new SSL products coming to market. The project started in September 2016. We will report on main targets of the project, current status of the achieved research results and plans of project results in industrial uptake. Our presentation will as well include latest research results of CMI team within the project
{"title":"Future Photometry Based on Solid-State Lighting Products - Joint Research Project of European Metrology Institutes","authors":"M. Smíd, P. Kliment, P. Linduška","doi":"10.1109/LUMENV.2018.8520965","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8520965","url":null,"abstract":"Luminous flux (1m) and active electrical power consumption (W) of new SSL products coming to market are measured at test laboratories in order to determine the luminous efficacy (Im/W) and energy class of the products. Due to the fact that spectral responsivities of V(A)-filtered photometers differ from the defined CIE V(λ) curve, all photometers are typically calibrated using incandescent light with correlated colour temperature (CCT) of 2856 K. This causes unwanted spectral errors in the measurements of SSL products at test laboratories and also in the field due to the large differences in the spectra of calibration sources and the light being measured, and in many cases cannot be corrected for. The EMPIR (European Metrology Programme for Innovation and Research) project 15SIB07 PhotoLED addresses the obsolescence of traditional incandescent standard lamp technology used in photometry and the need to support the introduction and uptake of solid-state lighting (SSL) products. It develops and validates the basis for a new photometric system based on white LEDs, by developing new LED-based calibration sources and measurement techniques supporting the specific properties of the new light sources and detector technology including illuminance measurement of the new LED-sources without optical V(A)-filters in the calibration of photometers and measurement facilities used for determining the energy efficiency of new SSL products coming to market. The project started in September 2016. We will report on main targets of the project, current status of the achieved research results and plans of project results in industrial uptake. Our presentation will as well include latest research results of CMI team within the project","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"16 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":"126062268","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.2018.8521042
W. Żagan, K. Skarżyński
Floodlighting designs have only been analysed in terms of visual and aesthetic beauty up to now. Research in the field of floodlighting has also focused on other aspects of this type of lighting in recent years. The energy efficiency issue and the impact on light pollution are the most crucial aspects. These issues have not yet been properly explored in the literature. Significant factors which affect the issue of the engineering aspect of floodlighting have to be determined and studied carefully because of their high importance. The main aim of this paper is to present the key factors which have a crucial impact on energy efficiency and light pollution in the field of floodlighting. These factors are: the direction and location of the lighting equipment, luminous intensity distribution, light output ratio, the method of floodlighting and the spectral power distribution of a light source, as well as the spectral distribution of the reflectance from the illuminated surface. Each of these factors are precisely commented on. These are presented by means of a calculation, a measurement or a visualization example, which clearly allow the crux of the problem to be analysed in the easiest way. The research shows that the problem of improving floodlighting design in respect of energy efficiency and light pollution is a complex and exacting problem for a lighting designer. It definitely requires the creation of an individual and unified system of assessment. It ought to take into account all the crucial factors and be simple, understandable and easy to use. Development of such a system is underway at the Lighting Technology Division of Warsaw University of Technology. It will soon be finalized in the form of a doctoral dissertation by one of the authors of this paper.
{"title":"Factors Having a Crutial Impact on Energy Efficiency of Floodlighitng","authors":"W. Żagan, K. Skarżyński","doi":"10.1109/LUMENV.2018.8521042","DOIUrl":"https://doi.org/10.1109/LUMENV.2018.8521042","url":null,"abstract":"Floodlighting designs have only been analysed in terms of visual and aesthetic beauty up to now. Research in the field of floodlighting has also focused on other aspects of this type of lighting in recent years. The energy efficiency issue and the impact on light pollution are the most crucial aspects. These issues have not yet been properly explored in the literature. Significant factors which affect the issue of the engineering aspect of floodlighting have to be determined and studied carefully because of their high importance. The main aim of this paper is to present the key factors which have a crucial impact on energy efficiency and light pollution in the field of floodlighting. These factors are: the direction and location of the lighting equipment, luminous intensity distribution, light output ratio, the method of floodlighting and the spectral power distribution of a light source, as well as the spectral distribution of the reflectance from the illuminated surface. Each of these factors are precisely commented on. These are presented by means of a calculation, a measurement or a visualization example, which clearly allow the crux of the problem to be analysed in the easiest way. The research shows that the problem of improving floodlighting design in respect of energy efficiency and light pollution is a complex and exacting problem for a lighting designer. It definitely requires the creation of an individual and unified system of assessment. It ought to take into account all the crucial factors and be simple, understandable and easy to use. Development of such a system is underway at the Lighting Technology Division of Warsaw University of Technology. It will soon be finalized in the form of a doctoral dissertation by one of the authors of this paper.","PeriodicalId":389317,"journal":{"name":"2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4)","volume":"27 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114032305","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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