scholarly journals Analysis of Occupants’ Visual Perception to Refine Indoor Lighting Environment for Office Tasks

Energies ◽  
2014 ◽  
Vol 7 (7) ◽  
pp. 4116-4139 ◽  
Author(s):  
Ji-Hyun Lee ◽  
Jin Moon ◽  
Sooyoung Kim
Keyword(s):  
Visual Perception ◽  
Lighting Environment ◽  
Indoor Lighting

scholarly journals A Field Study of the Impact of Indoor Lighting on Visual Perception and Cognitive Performance in Classroom

2020 ◽  
Vol 10 (21) ◽  
pp. 7436
Author(s):  
Qiang Liu ◽  
Zheng Huang ◽  
Zhijiang Li ◽  
Michael R. Pointer ◽  
Geng Zhang ◽  
...  
Keyword(s):  
Visual Perception ◽  
Field Study ◽  
Cognitive Performance ◽  
Light Emitting Diode ◽  
Visual Fatigue ◽  
Before And After ◽  
Text Reading ◽  
Lighting Environment ◽  
Indoor Lighting ◽  
The Impact

In this field study, a series of psychophysical tests were conducted to investigate the impact of indoor lighting on students’ visual perception and cognitive performance. A typical classroom of Wuhan University (China) was fitted with tubular light-emitting diode (LED) sources and LED panel sources in two experiments, respectively. Under the two lighting environments, seventy-nine college students were invited to complete a group of visual tests, which included colour preference evaluations of fruit and vegetables and skin tone, perceptual judgement on the atmosphere of the lighting environment, a reading comfort assessment concerning different paper colours, a Karolinska Sleepiness Scale (KSS) test quantifying alertness, and the Anfimov test of attention (also concerning paper colours). These tests were conducted twice, before and after a two-hour self-study under each lighting environment, with the aim of investigating the impact of visual fatigue on visual perception and cognitive performance. It was found that the influence of indoor lighting was significant on skin preference and atmosphere perception, while no measured effects of lighting were observed on participant’s alertness and attention. Meanwhile, the impact of visual fatigue was also found to be insignificant in this case. Interestingly, paper colour, rather than indoor lighting, was found to have a significant impact on the visual comfort of text reading. In addition, degree of proficiency significantly influenced the proofreading speed and accuracy of the subjects the in Anfimov test, which we believe should be taken into consideration when implementing similar tests in follow-up studies. The preliminary findings of this field study should provide a deeper understanding of how changes in classroom lighting contribute to visual perception and cognitive performance of occupants.

Lighting Environment Study on Rural Residential Buildings in Weihe Plain of China

2012 ◽  
Vol 193-194 ◽  
pp. 1165-1173
Author(s):  
Xi Liao ◽  
Jing Luo ◽  
Yuan Jiang ◽  
Yi Ping Zhu ◽  
Wen Bo Wu
Keyword(s):  
Psychological Health ◽  
Residential Buildings ◽  
Natural Light ◽  
Indoor Space ◽  
Environment Quality ◽  
Environment Study ◽  
Physical And Psychological Health ◽  
Lighting Environment ◽  
Indoor Lighting

As an important index reflecting residential quality, the lighting environment level of residential buildings exerts tremendous influence on both physical and psychological health of residents. Taking a typical rural house in Weihe Plain as example, with indoor lighting environment test, lighting habits of the resident and Ecotect software, the paper studies indoor lighting environment quality of rural residential buildings in Weihe Plain and analyzes the influence of residential buildings' design on lighting environment. The result shows that rural residents in Weihe Plain usually don’t attach due importance to the lighting environment quality of living space, and the design of indoor space goes against effective utilization of natural light. Thus, the paper eventually brings forward a method to consummate the lighting environment of rural residential buildings and explores the buildings’ potential of saving energy by making use of natural light.

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