Perception of Lighting Fluctuation in Office Lighting Environment

Shikakura, Tomoaki; Morikawa, Hiroyuki; Nakamura, Yoshiki

doi:10.2150/jlve.27.75

Cited by 21 publications

(9 citation statements)

References 1 publication

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“…Akashi and Neches found that once the horizontal illuminance is reduced by more than 20% from the initial level, over 50% of the occupants are likely to detect the reduction 4 . These results are in line with previous studies that show that 50% of the population could not detect a 15-20% illuminance reduction when engaged in a visual task 3,5,6 and are in line with the results from Newsham and Mancini 7 . When a task is performed on a PC screen the sensitivity to illuminance reductions is even lower.…”

Section: Introductionsupporting

confidence: 93%

“…[3][4][5]8 Even though the study of Shikakura et al was performed in a multi-user office space, only one subject at a time participated in the experiment, while the light output of the luminaire above the subject's desk was altered. 6 The study we present here explores the acceptance of occupancy-triggered dimming of a single luminaire above a colleague's desk, in the users' visual field. It will include the influence of dimming speed, dimming direction and feedback regarding the reason for dimming, this being the change in occupancy.…”

Section: Introductionmentioning

confidence: 99%

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Dimming strategies for open office lighting: User experience and acceptance

Chraibi

Creemers

Rosenkötter

et al. 2018

Lighting Research & Technology

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Sensor-triggered control strategies can limit the energy consumption of lighting by considering the presence of users in the office and dimming lighting down when it is not needed. In multi-user offices, the application of occupancy-based dimming at room level limits the energy saving potential. However, zone or desk-based dimming may affect the comfort of co-workers due to its dynamics. This paper reports the assessment by 17 participants (30 to 50 years of age) of occupancy-based dimming in a mock-up office, using different dimming speeds. Participants consisted of co-workers experiencing changes triggered by others, and actors triggering these light changes. While the participants performed an office-based task, the luminaire above the actors' desk was dimmed from approximately 550 lx to 350 lx (average horizontal illuminance), and vice versa. The participants evaluated the dimming conditions regarding their noticeability and acceptability. The study showed that the noticeability of light changes due to dimming, increasing when fading times become shorter. Dimming with a fading time of at least two seconds was experienced as acceptable by more than 70% of the participants. The results of this experiment provide insights to system behaviour that does not compromise user experience while addressing the energy efficient use of electric lighting.Address for correspondence: Sanae Chraibi, Philips Lighting B.V., High Tech Campus 7,

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Section: Introductionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Dimming strategies for open office lighting: User experience and acceptance

Chraibi

Creemers

Rosenkötter

et al. 2018

Lighting Research & Technology

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“…960 lx ve 1500 lx değerlerine sahip iki ofisin karşılaştırıldığı çalışmada, mekânların birbirinden farklı algılandığı ve 1500 lx değerinin üzerindeki aydınlık düzeyinin çalışan algısında olumsuz çağrışımlar yaptığı görülmüştür (Sawada, 1999). Aynı zamanda aydınlık düzeyinde meydana gelen azalma durumu, artırılması durumuna göre daha yoğun hissedilmiştir (Shikakura, 2003). Yapılan bazı diğer çalışmalarda ise çalışma düzlemindeki ortalama aydınlık düzeyinin 800 lx olduğunda meydana gelen çevresel koşul olumlu olarak değerlendirilirken (Onaygil ve Tenner, 1993), aydınlık düzeyinin 1300 lx seviyesinden yukarı çıkması çalışma ortamının genel görsel konfor koşullarında belirgin bir fark yaratmamıştır (Gabriela, 2003).…”

Section: Aydınlatma Sistemiunclassified

Ofi̇s Tasariminda Ergonomi̇k Koşullarin Sağlanmasinin Önemi̇

et al. 2022

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The integration of the social structure and technical structure of office organizations is one of the key issues of today's business life. It is also important that the employee works in the office in a healthy, efficient, willing, and appropriate manner. Ergonomics is defined as the process of adapting people and their environment to each other physically and psychologically, as the most comfortable way to use human skills without forcing them physically and spiritually. In today's modern world, most office workers face a variety of problems in terms of the environmental and physical conditions of their work environment. This adversely affects the health and mental health of employees and their work productivity. It is necessary to organize office spaces where the employee is prevented from being inadequate in the face of developing technology, machinery and operating systems and is ergonomically considered healthy. All these arrangements must be made with the human anthropometric measurements, anatomical structure, physiological capacity, and tolerances in mind. The purpose of this study is to examine the impact of office ergonomics on business efficiency by addressing the importance of ergonomics science. In this objective, the health and work efficiency of the employees in the perspective of the components that make up the workplace have been analyzed. The study found that factors such as illumination system, sound and noise control, air conditioning system, vehicle-equipment compatibility and color preference have significant impact on employees in the working environment

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“…It seems likely that lighting and other aspects of the physical environment in general influence work outcomes through the mediation of work attitudes and other psychosocial factors (Newsham et al, in press). For practitioners, these results indicate that in addition to optimizing lighting conditions in the office, office ergonomists must also communicate with workers about the possible benefits of ambient and task lighting and how they might best adjust these for their changing needs (e.g., Akashi & Neches, 2005;Shikakura, Morikawa, & Nakamura, 2003).…”

Section: Ambient and Task Lightingmentioning

confidence: 99%

Office Ergonomics: A Review of Pertinent Research and Recent Developments

Brand¹

2008

Reviews of Human Factors and Ergonomics

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Office ergonomics provides an arbitrary framework for integrating a large body of research that is relevant to the design of office work environments to optimize the health, safety, comfort, and effectiveness of their human occupants. In this chapter, I organize this vast literature by focusing on important empirical and practical developments over the last decade. In particular, a systems perspective is maintained in order to more fully interpret the salient psychosocial (subjective) variables that mediate the influence of physical-environment characteristics on relevant human outcomes. I suggest that this approach is important for capturing current trends as well as moving the discipline forward. Included are reviews of research related to seating and other furniture considerations (e.g., the update of HFS 100 to HFES 100), pertinent information technologies (e.g., input devices and laptops), lighting, thermal comfort, and other general ambient conditions (e.g., private [cellular] offices vs. open-plan offices).

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Perception of Lighting Fluctuation in Office Lighting Environment

Cited by 21 publications

References 1 publication

Dimming strategies for open office lighting: User experience and acceptance

Dimming strategies for open office lighting: User experience and acceptance

Ofi̇s Tasariminda Ergonomi̇k Koşullarin Sağlanmasinin Önemi̇

Office Ergonomics: A Review of Pertinent Research and Recent Developments

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