Ambiguities regarding the relationship between office lighting and subjective alertness: An exploratory field study in a Dutch office landscape

Duijnhoven, J. van; Aarts, Mpj Mariëlle; Rosemann, Alp Alexander; Kort, Helianthe

doi:10.1016/j.buildenv.2018.06.011

Cited by 27 publications

(18 citation statements)

References 18 publications

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“…The results of the papers are summarized in Table 4. The papers show that adequate light levels and quality contribute to both physical well-being and better mood (Lamb & Kwok, 2016;Thayer et al, 2010;Veitch, Newsham, Boyce, & Jones, 2008;Viola, James, Schlangen, & Dijk, 2008), but not to alertness (Van Duijnhoven, Aarts, Rosemann, & De Kort, 2018), and that more daylight enhances sleep quality (Bjørnstad, Patil, & Raanaas, 2016;Boubekri, Cheung, Reid, Wang, & Zee, 2014). Dynamic lighting with variation of colour temperature during the day (De Kort & Smolders, 2010), and different proportions of direct and indirect light (Fostervold & Nersveen, 2008) do not impact health.…”

Section: Light In the Workpacementioning

confidence: 99%

The relationship between interior office space and employee health and well-being – a literature review

Colenberg

Jylhä

Arkesteijn

2020

Building Research & Information

147

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Health is a trending topic in the office market, yet scientific research on healthy offices is scattered. This study undertakes a systematic literature review on the relationship between the interior space of offices and physical, psychological and social well-being. The review identifies the characteristics of interior office space that have been studied in relation to employee health, and outlines the empirical evidence. Of 2816 papers in the database, 50 addressed the relationship between interior office space and health and did so based on six features: layout, furniture, light, greenery, controls and noise. Evidence on the relationship between interior space and health has accumulated only within a few topics. On the one hand, open-plan offices, shared rooms and higher background noise are negatively related to health. On the other hand, positive relationships are found between physical well-being and aspects that encourage physical activity; between physical/psychological well-being and (day)light, individual control and real/ artificial greenery; and between social well-being and small shared rooms. In measuring health, physical well-being is predominant. Similarly, studies have predominantly aimed to prevent health problems rather than enhance health. Overall, the related research is in a nascent stage. Further research is required to verify claims about healthy offices.

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Section: Light In the Workpacementioning

confidence: 99%

The relationship between interior office space and employee health and well-being – a literature review

Colenberg

Jylhä

Arkesteijn

2020

Building Research & Information

147

View full text Add to dashboard Cite

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“…Because these acceptance studies also show contrasting results for the influence of time of day, there is clearly a need for studies that address the role of this factor in lighting preferences. SA might underlie these dynamics, as also argued by Begemann et al (1997). van Duijnhoven et al (2018 found a relationship between SA and the preferred horizontal illuminance at the desk but only for a subset of users.…”

Section: Introductionmentioning

confidence: 59%

Preferred luminance distributions in open-plan offices in relation to time-of-day and subjective alertness

Bakker

Aarts

Kort

et al. 2019

LEUKOS

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Dynamic lighting is one of the new trends in lighting research; providing the right lighting level at the right time could possibly increase the alertness and performance of office workers. However, they might have preferences that deviate from this "healthy" lighting. Simultaneously, the building environment becomes increasingly automated, with occupancy-based control as one of the most well-known examples to reduce offices' lighting energy consumption. Nevertheless, preferences for lighting levels in the unoccupied area of the multi-occupant office space have not been addressed yet. Therefore, we studied luminance distribution preferences in relation to time of day and subjective alertness (SA) in a single occupancy scenario. Participants (N = 30) set the surrounding and background lighting six times a day as we first probed for SA. Our results clearly showed that a subset preferred varying luminance distributions; participants had fluctuating feelings of alertness, too. Preferences deviated sometimes from the typical dynamic lighting scenarios, suggesting that they do not always prefer healthy lighting. Moreover, we identified an effect of SA on the preferences, both with and without controlling for time of day. Hence, this study showed that we need to address these two factors when we want to provide satisfactory lighting conditions in case the office is not fully occupied. These are likely to affect other lighting preferences and therefore deserve more attention from research. Because we identified large individual differences, we suggest personalizing dynamic scenarios as the focus of future research.

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“…A pair of symmetrical square wave voltages (v gs1 , v gs2 ) were generated by the self-excited windings, as depicted in Figure 2. Their frequency f s was in synchronism with the resonant frequency f r which was created by the combination of resonant inductor L r and resonant capacitor C r , as can be expressed by Equations (1) and (2).…”

Section: Self-excited Driving Voltagesmentioning

confidence: 99%

“…As such, with these features, the usage of LED lighting has become an irresistible trend. Among the various advantages of LED, the most prominent still focuses on its high lighting efficiency, although not all questions about the interaction between humans and light emitted by the LEDs have been completely solved [1][2][3]. Nowadays, in pursuit of things such as high lighting quality, special lighting atmospheres, and/or energy-saving capacities, many LED lights have incorporated a dimming function.…”

Section: Introductionmentioning

confidence: 99%

A Single-Stage High-Power Factor Converter with Synchronized Self-Excited Technique for LED Lighting

2018

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This paper proposes a single-stage, high power-factor light-emitting diode (LED) driver with a self-excited control scheme for the power switches. The self-excited mechanism is accomplished by fetching the driving voltages from a center-tapped transformer. The frequency of the driving voltages is exactly the same as the resonant frequency of the resonant converter, thus synchronizing the resonant frequency with the switching frequency and achieving zero-voltage switching (ZVS) and zero-current switching (ZCS) of power switches. The circuit topology is mainly composed of a half-bridge LC resonant converter, along with a boost-type power-factor corrector (PFC) to fulfill the single-stage structure, meaning that the presented LED driver possesses high power-factor features and low switching loss. Finally, a 40 W prototype circuit is implemented and tested, and the experimental results exhibit a satisfactory performance.

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Ambiguities regarding the relationship between office lighting and subjective alertness: An exploratory field study in a Dutch office landscape

Cited by 27 publications

References 18 publications

The relationship between interior office space and employee health and well-being – a literature review

The relationship between interior office space and employee health and well-being – a literature review

Preferred luminance distributions in open-plan offices in relation to time-of-day and subjective alertness

A Single-Stage High-Power Factor Converter with Synchronized Self-Excited Technique for LED Lighting

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