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Lighting is one of the environmental elements that facilitates people to maintain their lives. With light people can collect visual cues about their environments in which they can perform visual tasks safely and comfortably. Exploring the lighting systems and conditions in residential interiors is important for introducing new concepts concerning human visual comfort. The study aimed to collect data and conduct a short-term analysis about residential lighting which will be a part of a more comprehensive research. The study focused on day- and artificial lighting systems, conditions and people’s assessments in interiors of residential buildings. An internet-based survey was distributed in July-August 2020 through Google Survey across Poland, Turkey, the U.K. and Sweden in the native languages of each country. 29 adult females and 31 adult males voluntarily participated in the present study. The study identified several interconnected factors related to residential lighting and explored them in detail. Large percentage of the respondents were satisfied or very satisfied with daylighting quality in summer (86.7%) and artificial lighting quality (78.4%) in their living areas. The amount and uniformity of lighting were the most effective cues connected with the respondents’ satisfaction. Reasonable and promising outcomes that were found can be used in generating new and comprehensive data about lighting quality in residential buildings.
Rengin Aslanoğlu; Piotr Pracki; Jan K. Kazak; Begüm Ulusoy; Sepideh Yekanialibeiglou. Short-term analysis of residential lighting: A pilot study. Building and Environment 2021, 196, 107781 .
AMA StyleRengin Aslanoğlu, Piotr Pracki, Jan K. Kazak, Begüm Ulusoy, Sepideh Yekanialibeiglou. Short-term analysis of residential lighting: A pilot study. Building and Environment. 2021; 196 ():107781.
Chicago/Turabian StyleRengin Aslanoğlu; Piotr Pracki; Jan K. Kazak; Begüm Ulusoy; Sepideh Yekanialibeiglou. 2021. "Short-term analysis of residential lighting: A pilot study." Building and Environment 196, no. : 107781.
This article compares the brightness and uniformity perception of virtual corridor displayed on computer screens and under different surrounding conditions, between two groups of respondents. The computer simulations of 10 lighting scenarios in the empty corridor, diverse in terms of luminance distribution and lighting power density, were developed. The visual assessment of the lighting effects was carried out on the basis of surveys. The respondents assessed the brightness and uniformity of each plane and entire corridor for each scenario, using semantic differential scaling. Each person from the first group individually made their evaluations on the same computer screen placed in the experimental box. Each person from the second group made the assessments on different computer screens, and all respondents from this group made the evaluations in the computer room at the same time. A high convergence of the results between the groups was found in the assessments of brightness and uniformity perception for consecutive lighting situations. In 93.75% of cases, the same perception in brightness and uniformity between the group means was achieved. A high convergence of the results between the groups in the assessment of brightness and uniformity perception for the same lighting situations was also demonstrated.
Piotr Pracki; Rafał Krupiński. Brightness and Uniformity Perception of Virtual Corridor with Artificial Lighting Systems. Energies 2021, 14, 412 .
AMA StylePiotr Pracki, Rafał Krupiński. Brightness and Uniformity Perception of Virtual Corridor with Artificial Lighting Systems. Energies. 2021; 14 (2):412.
Chicago/Turabian StylePiotr Pracki; Rafał Krupiński. 2021. "Brightness and Uniformity Perception of Virtual Corridor with Artificial Lighting Systems." Energies 14, no. 2: 412.
The common use of electric lighting in interiors has led to the need to search for user- and environmentally-friendly solutions. In this research, the impact of the luminaires and room parameters on the selected parameters of general lighting in interiors was assessed. To achieve the objective of this work, a computer simulation and statistical analysis of results were conducted. The illuminance uniformity on work plane, ceiling and wall relative illuminances, utilance, and normalized power density of lighting installations for 432 situations were analyzed in detail. The scenarios were varied in terms of room size, reflectance, lighting class, luminaire downward luminous intensity distribution, and layout. The lighting class was a factor having the highest impact on ceiling and wall illumination, utilance, and power. It was also shown that the impact of lighting class on ceiling illumination, utilance and power, was different in interiors of various sizes. The impact of reflectances and luminaire layouts on the analyzed parameters was significantly lower. The results also demonstrated that the use of different lighting classes gave the possibility of reducing the power of general lighting in interiors at a level of 30% on average. Based on the results, a classification of energy efficiency in general lighting in interiors was also proposed. Understanding the correlations between the lighting system used and the effects achieved is helpful in obtaining comfortable and efficient lighting solutions in interiors.
Piotr Pracki; Michał Dziedzicki; Paulina Komorzycka. Ceiling and Wall Illumination, Utilance, and Power in Interior Lighting. Energies 2020, 13, 4744 .
AMA StylePiotr Pracki, Michał Dziedzicki, Paulina Komorzycka. Ceiling and Wall Illumination, Utilance, and Power in Interior Lighting. Energies. 2020; 13 (18):4744.
Chicago/Turabian StylePiotr Pracki; Michał Dziedzicki; Paulina Komorzycka. 2020. "Ceiling and Wall Illumination, Utilance, and Power in Interior Lighting." Energies 13, no. 18: 4744.
This paper presents an attempt at a unified approach for the assessment of outdoor lighting solutions at the design stage. First of all, the lighting criteria for different types of outdoor lighting installations have been carefully described. Despite the differences in criteria, it is possible to find a common ground for the assessment of lighting solutions at the design stage. This is based on the need for the assessment of lighting solutions to be included in the requirements for the luminous environment, light pollution, and energy efficiency. The review and analysis of the standards and reports allows an experimental procedure to be created, the main aim of which is to find the best and most sustainable lighting solution for any outdoor situation. The procedure was tested by the example of an analysis of parking lot lighting solutions. In the case analyzed, 120 solutions were considered. It appeared that, in only 65 cases were the requirements referring to both lighting condition and light pollution met. Finally, based on the lighting energy efficiency assessment, ten solutions were selected as the most suitable. Furthermore, only one solution out of the ten was the most beneficial, taking into account the extra criterion of basic economic cost. The case study confirms that the assessment procedure allows the most beneficial solution to be selected, taking into account the luminous environment, as well as light pollution and energy efficiency criteria. The proposed multi-criteria assessment procedure may be used as a valuable tool by lighting designers to select the most beneficial solution in order to meet the needs of safety, visual efficiency, and comfort, as well as taking into account light pollution and energy efficiency restrictions.
Piotr Pracki; Krzysztof Skarżyński. A Multi-Criteria Assessment Procedure for Outdoor Lighting at the Design Stage. Sustainability 2020, 12, 1330 .
AMA StylePiotr Pracki, Krzysztof Skarżyński. A Multi-Criteria Assessment Procedure for Outdoor Lighting at the Design Stage. Sustainability. 2020; 12 (4):1330.
Chicago/Turabian StylePiotr Pracki; Krzysztof Skarżyński. 2020. "A Multi-Criteria Assessment Procedure for Outdoor Lighting at the Design Stage." Sustainability 12, no. 4: 1330.
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.
Piotr Pracki. Impact of Direct Lighting Luminaires' Luminous Intensity Distribution on Lighting Quality in Interiors. 2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4) 2018, 1 -6.
AMA StylePiotr Pracki. Impact of Direct Lighting Luminaires' Luminous Intensity Distribution on Lighting Quality in Interiors. 2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4). 2018; ():1-6.
Chicago/Turabian StylePiotr Pracki. 2018. "Impact of Direct Lighting Luminaires' Luminous Intensity Distribution on Lighting Quality in Interiors." 2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4) , no. : 1-6.
Piotr Pracki; Urszula Blaszczak. The Analysis and Assessment of Lighting System in Mass Residence Building on the Example of Dormitory in Warsaw. Procedia Environmental Sciences 2017, 38, 356 -363.
AMA StylePiotr Pracki, Urszula Blaszczak. The Analysis and Assessment of Lighting System in Mass Residence Building on the Example of Dormitory in Warsaw. Procedia Environmental Sciences. 2017; 38 ():356-363.
Chicago/Turabian StylePiotr Pracki; Urszula Blaszczak. 2017. "The Analysis and Assessment of Lighting System in Mass Residence Building on the Example of Dormitory in Warsaw." Procedia Environmental Sciences 38, no. : 356-363.
Improvement of energy efficiency in buildings is the goal of many activities around the world. In recent years a need to increase the number of buildings, which not only fulfil the minimum energy performance requirements, but have very low energy consumption and are environmentally friendly has been recognised. In this paper the issues of electric lighting quality in educational buildings, focused on the analysis of lighting energy efficiency are presented. A brief characteristic of the selected educational building and requirements for the assessment were presented. The lighting conditions in selected interiors of the building and the lighting energy efficiency in the whole building were evaluated. To demonstrate the opportunity to improve lighting conditions and energy efficiency, four solutions for each selected interior were proposed. New fluorescent and LED lighting solutions were compared in detail. The comparison between the existing lighting and new solutions was conducted either. The lighting in evaluated building was not energy efficient and what worse, the lighting conditions in many interiors were much below the requirements. Introducing new lighting solutions should improve the quality of luminous environment in interiors and reduce substantially the lighting power installed as well as the energy use in the building.
Piotr Pracki; Urszula Joanna Blaszczak. The issues of interior lighting on the example of an educational building adjustment to nZEB standard. 2016 IEEE Lighting Conference of the Visegrad Countries (Lumen V4) 2016, 1 -6.
AMA StylePiotr Pracki, Urszula Joanna Blaszczak. The issues of interior lighting on the example of an educational building adjustment to nZEB standard. 2016 IEEE Lighting Conference of the Visegrad Countries (Lumen V4). 2016; ():1-6.
Chicago/Turabian StylePiotr Pracki; Urszula Joanna Blaszczak. 2016. "The issues of interior lighting on the example of an educational building adjustment to nZEB standard." 2016 IEEE Lighting Conference of the Visegrad Countries (Lumen V4) , no. : 1-6.
Piotr Pracki. The use of different metrics for the evaluation of road lighting energy efficiency. PRZEGLĄD ELEKTROTECHNICZNY 2016, 1, 226 -230.
AMA StylePiotr Pracki. The use of different metrics for the evaluation of road lighting energy efficiency. PRZEGLĄD ELEKTROTECHNICZNY. 2016; 1 (2):226-230.
Chicago/Turabian StylePiotr Pracki. 2016. "The use of different metrics for the evaluation of road lighting energy efficiency." PRZEGLĄD ELEKTROTECHNICZNY 1, no. 2: 226-230.
In this paper, the parameters influencing the installed power demand as well as the installed and normalised power density for road lighting are introduced. The levels of these parameters typical for different road lighting situations are assumed and the resulting normalised power densities for road lighting are derived. A classification system for the energy efficiency of road lighting based on the installed and normalised power densities is proposed. The classification system can be used to compare the energy efficiency of designed and used road lighting as well as forming a basis for an energy efficiency evaluation system for road lighting.
P. Pracki. A proposal to classify road lighting energy efficiency. Lighting Research & Technology 2011, 43, 271 -280.
AMA StyleP. Pracki. A proposal to classify road lighting energy efficiency. Lighting Research & Technology. 2011; 43 (3):271-280.
Chicago/Turabian StyleP. Pracki. 2011. "A proposal to classify road lighting energy efficiency." Lighting Research & Technology 43, no. 3: 271-280.