Effects of correlated color temperature of office light on subjective perception, mood and task performance

Zeng, Yunyi; Sun, Hongli; Yu, Juan; Lin, Borong

doi:10.1016/j.buildenv.2022.109508

Cited by 27 publications

(4 citation statements)

References 55 publications

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“…This study states that respondents with whitewashed workplaces have a lower level of distraction and are preferred by workers compared to rooms with paint with a combination of blue and red. Similar research states that bright color levels affect the mood of workers (Zeng et al, 2022).…”

Section: Lightingmentioning

confidence: 74%

Evaluating healthy workplace in geothermal industry

Febrian

2023

AJTEOH

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The geothermal industry is located in mountainous areas and far from urban centers that are at risk of danger. Hazard management is one aspect of occupational safety health management, including occupational environmental health. Therefore, this study aims to evaluate the healthy workplace in geothermal industry. Observation and measurement technique are used to determine the light intensity, noise, humidity and temperature in all room in the industry. The results state that there are three rooms that did not meet the standard, the noisy still eligible both for offices (65dBA) and PLTP (85 dBA), the humidity is quite high (60%) and the average temperature is 15-20oC. Most of the indicators are still below the limit value based on the company and local regulations. Pengukuran aspek fisik monitoring kesehatan lingkungan kerja sudah memperoleh hasil yang baik. Namun, masih ada beberapa lokasi lingkungan kerja yang perli dilakukan perbaikan lagi dari segi pencahayaan dengan penggantian jenis lampu LED, dan pengaturan suhu dan kelembapan ruang. The assessment of healthy workplace is needed to improve the well-being of the workers in geothermal industry.

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Section: Lightingmentioning

confidence: 74%

Evaluating healthy workplace in geothermal industry

Febrian

2023

AJTEOH

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“…For instance, in a study conducted by Zeng et al, participants were exposed to four different CCT values: 4000 K, 6000 K, 8000 K, and 10,000 K, while performing two types of tasks. The findings showed that participants felt more comfortable but sleepier under lower CCT values, while they felt more productive but less comfortable under higher CCT values such as 6000 K [25]. It is important to note that these studies were conducted in the absence of daylight and did not account for the interactions between different light sources such as daylight/sky and electric lights.…”

Section: Introductionmentioning

confidence: 98%

“…The small number of papers on this area suggests a significant gap in the literature regarding human impressions of indoor lighting. Most studies investigating the impact of lighting conditions on the perceived quality of indoor spaces can be grouped into two categories: those conducted in laboratory settings [24,25,29], and those conducted in virtual settings [30][31][32][33]. In both settings, electric and natural light are often studied separately to ensure controlled research conditions.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Impact of Combined Daylight and Electric Light on Human Perception of Indoor Spaces

Nikookar,

Sawyer,

Goel

et al. 2024

Sustainability

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People spend more than 90% of their time indoors, and, as such, improving indoor lighting quality can enhance their quality of life by positively influencing both physiological and psychological aspects. Numerous studies suggest that perceptions of a space vary depending on a number of lighting attributes present. Significant effort has been made across various fields to identify the spatial lighting conditions and attributes that impact human perception, although we lack studies that explore the impact of these conditions in tandem. This paper investigates how interior lighting conditions influence human impressions of room ambiance. The study examines 16 different interior scenes, considering factors such as sky condition (sunny vs. overcast), shading blinds position (open vs. closed), presence or absence of electric light (on vs. off), and Correlated Color Temperature (CCT) (2700 K, 4000 K, and 6500 K). The evaluation is conducted within an office environment at Carnegie Mellon University, using a combination of objective lighting metrics and subjective assessments. In total, 26 participants, consisting of 11 females, 14 males, and one undisclosed, aged between 18 and 50, evaluated the office ambiance under various lighting conditions using semantic differential scales. The analysis showed that the variation of blinds and CCT levels significantly influenced the participants’ impression of light. The study also identified statistically significant interactions between “blinds and CCT” and “blinds and sky” conditions, highlighting the combined influence of these variables on shaping indoor light impressions. This research offers valuable insights into the complex interplay of different lighting factors in shaping human perceptions, and underscores the importance of optimizing indoor lighting conditions for creating healthy and sustainable indoor environments.

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“…Yet, daylight can be considered task lighting since it allows for the recognition of crucial elements such as colour differentiation (Winchip, 2022). Zeng et al (2022) studied the influence of Correlated Color Temperature (CCT) at the workspace; the experiment found that 4000K was a psychological and physiologically comfortable CCT for participants. The most prevalent light sources for 4000K are fluorescent 5 4100K and metal halide 5 4000K, both of which define it as a cold colour (Russell, 2008).…”

Section: Introductionmentioning

confidence: 99%

Hybrid lighting approach to improve interior workspace environments: a case study in the UAE

Al Kailani,

Al Dhaheri,

Sheta

2024

FEBE

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PurposeInterior workspace environments use exclusively artificial light, resulting in a loss of biological connection and natural light quality, as well as greater energy consumption. The purpose of the study is to identify a suitable system that can provide natural light to such interior spaces throughout the day while supplementing it with artificial light when necessary. The fundamental aim is to provide insights into the most effective solutions for energy-efficient lighting design in the UAE's environment, with the potential to lower energy consumption related to interior lighting.Design/methodology/approachThe study adopted an empirical approach to gather and analyze primary data based on field measurements to understand and assess existing lighting conditions, as well as DIALux lighting simulation software to test the efficacy of the proposed HLS in terms of natural light delivery, illumination quality and energy consumption. A branch of a local bank in the United Arab Emirates, situated inside one of the shopping malls where there is no natural light penetration, has been chosen as a case study.FindingsThe findings of comparing the base case to four probable scenarios that used HLS revealed that the third scenario, which uses 100% pure sunshine and 35% artificial LED light during daylight operations and 100% LED light during night duty, is considered to be optimal in terms of illumination quality and energy efficiency.Originality/valueThe study demonstrated the potential of innovative lighting to improve the visual working environment in interior spaces with limited access to direct natural lighting, especially in arid regions, where sunlight is plentiful throughout the year. The study contributes new insights into the establishment of lighting-related recommendations and standards for the UAE context. This may include advice for sustainable construction practices, lighting guidelines or incentives to encourage the use of hybrid lighting technology in commercial and institutional buildings.

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Effects of correlated color temperature of office light on subjective perception, mood and task performance

Cited by 27 publications

References 55 publications

Evaluating healthy workplace in geothermal industry

Evaluating healthy workplace in geothermal industry

Investigating the Impact of Combined Daylight and Electric Light on Human Perception of Indoor Spaces

Hybrid lighting approach to improve interior workspace environments: a case study in the UAE

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