Statistical Evaluation of Dimmable Interior Lighting System Consumption Using Daylight

2016 ◽  
pp. 171-180
Author(s):  
Tomáš Novák ◽  
Petr Bos ◽  
Jan Šumpich ◽  
Karel Sokanský
Keyword(s):  
Statistical Evaluation ◽  
Lighting System ◽  
Interior Lighting

The photocytotoxicity of different lights on mammalian cells in interior lighting system

2012 ◽  
Vol 117 ◽  
pp. 13-18 ◽  
Author(s):  
Jiayin Song ◽  
Tingting Gao ◽  
Maole Ye ◽  
Hongtao Bi ◽  
Gang Liu
Keyword(s):  
Mammalian Cells ◽  
Lighting System ◽  
Interior Lighting

A Simple Method to Improve VCP by Reducing DGR in an Interior Lighting Installation

2018 ◽  
pp. 73-81
Author(s):  
Madjidi Faramarz ◽  
Abedi Kamal ad-Din
Keyword(s):  
Surface Area ◽  
Main Role ◽  
Visual Comfort ◽  
Lighting System ◽  
Simple Method ◽  
Evaluation Systems ◽  
Interior Lighting ◽  
Modified Equations ◽  
Comfort Perception ◽  
Discomfort Glare

Discomfort glare rating (DGR) and Unified glare rating (UGR) are main models currently used as discomfort glare evaluation systems, both of which are calculated employing four factors including the luminaire size, the luminaire position relative to the observer, background luminance, and the luminaires number and location. This study aims at proposing a simple solution for reducing DGR and thereby increasing visual comfort perception (VCP) in an interior lighting system. The proposed solution is based solely on variations of luminaire surface area without change in other factors, e.g. candlepower and number and location of luminaires in the lighting system. To this end, firstly, the equations related to DGR were modified for a desired luminaire, and, secondly, by solving the modified equations, the new luminaire surface area was obtained, which caused DGR decrease and VCP improvement. Finally, by some modifications in the location of selected luminaires having main role on DGR, the VCP rose considerably.

scholarly journals Ceiling and Wall Illumination, Utilance, and Power in Interior Lighting

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4744 ◽  
Author(s):  
Piotr Pracki ◽  
Michał Dziedzicki ◽  
Paulina Komorzycka
Keyword(s):  
Energy Efficiency ◽  
Computer Simulation ◽  
Lighting System ◽  
Room Size ◽  
Interior Lighting ◽  
Analysis Of Results ◽  
The Common ◽  
The Impact ◽  
Illuminance Uniformity

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.

Towards a user preference model for interior lighting Part 1: Concept of the user preference model and experimental method

2018 ◽  
Vol 51 (7) ◽  
pp. 1014-1029 ◽  
Author(s):  
TQ Khanh ◽  
P Bodrogi ◽  
X Guo ◽  
PQ Anh
Keyword(s):  
Lighting Design ◽  
User Acceptance ◽  
User Preference ◽  
The Internet ◽  
Lighting System ◽  
Colour Preference ◽  
Preference Model ◽  
Interior Lighting ◽  
Factors Influencing ◽  
The Internet Of Things

The objective and subjective factors influencing human-centric lighting design and their effect on the user of the lighting system are analysed with the aim of developing a user preference model. It is discussed how to apply this user preference model in the Internet of Things network structure of luminaires in order to obtain an ‘Internet of Luminaires’ for good user acceptance. The method of a visual experiment intended to elucidate these concepts and contribute to the user preference model is described. In the experiment, subjects assessed scene brightness, visual clarity, colour preference and scene preference in a real room. Modelling equations of these attributes will be shown and discussed in Part 2 of this work.

Correlations among lighting quality metrics for interior lighting

2018 ◽  
Vol 51 (8) ◽  
pp. 1192-1207
Author(s):  
P Bodrogi ◽  
QT Vinh ◽  
TQ Khanh
Keyword(s):  
Light Intensity ◽  
Light Source ◽  
User Acceptance ◽  
Quality Metrics ◽  
Strongly Correlated ◽  
Two Dimensional ◽  
Lighting System ◽  
Interior Lighting ◽  
Source Spectra ◽  
General User

Correlations between selected lighting quality metrics derived from the spectrum were computed and interpreted for a representative set of interior light source spectra. Metrics of brightness and the melanopic effect were strongly correlated with each other but not with the metrics of colour quality. Results can be used to establish a two-dimensional diagram with criterion values to ensure the general user acceptance of a lighting system. This diagram can be extended in the future by further metrics describing light intensity and spatial and temporal light distributions. Relationships between lighting quality metrics and colorimetric quantities as well as photoreceptor signal values are also shown.

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