Effect of color temperature on melatonin production for illumination of working environments

Kraneburg, Anja; Franke, Steffen; Methling, Ralf; Griefahn, Barbara

doi:10.1016/j.apergo.2016.08.006

Cited by 29 publications

(26 citation statements)

References 40 publications

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“…Two studies evaluated adolescents (age 13-18 years) and compared the results with adult participants [136,137]. Mean age of participants was 25 years in eight studies [123,124,[126][127][128][129]133,138], with a range of 18 to 30 years in eleven studies [117,121,122,127,131,[139][140][141][142][143][144]. Participants with an age range to 40 years were included in six studies [125,132,[145][146][147][148], those with an age range to 50 years were included in three studies [134,136,149], and those with an age range from 18 to 60 years were included in four studies [120,137,150,151].…”

Section: Mammals (Humans) (A) Description Of Studies and Participantsmentioning

confidence: 99%

“…Polychromatic light was used in most studies [117,122,124,126,127,129,131,134,138,139,[141][142][143][145][146][147][149][150][151]. Some studies examined effects of monochromatic light [120,144], LED monochromatic light [123,132,148], or LED polychromatic light [136,137].…”

Section: Number Gender (M F) Age Of Subjectsmentioning

confidence: 99%

“…The majority of studies used CCT <3000 K [121,122,127,129,142,146,147], and between 3000 and 6500 K [117,122,126,127,131,139,140,143,147,150,151]. Two studies used CCT >6500 K [141,150]. One study tested illuminance under seven different CCTs ranging from 1600 to 14,000 K [141]; in one study, the authors used 2700 K and 5600 K [136], and, in one study, they used 2700 K and 6500 K [137].…”

Section: Number Gender (M F) Age Of Subjectsmentioning

confidence: 99%

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Light Pollution, Circadian Photoreception, and Melatonin in Vertebrates

et al. 2019

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Artificial light at night (ALAN) is increasing exponentially worldwide, accelerated by the transition to new efficient lighting technologies. However, ALAN and resulting light pollution can cause unintended physiological consequences. In vertebrates, production of melatonin—the “hormone of darkness” and a key player in circadian regulation—can be suppressed by ALAN. In this paper, we provide an overview of research on melatonin and ALAN in vertebrates. We discuss how ALAN disrupts natural photic environments, its effect on melatonin and circadian rhythms, and different photoreceptor systems across vertebrate taxa. We then present the results of a systematic review in which we identified studies on melatonin under typical light-polluted conditions in fishes, amphibians, reptiles, birds, and mammals, including humans. Melatonin is suppressed by extremely low light intensities in many vertebrates, ranging from 0.01–0.03 lx for fishes and rodents to 6 lx for sensitive humans. Even lower, wavelength-dependent intensities are implied by some studies and require rigorous testing in ecological contexts. In many studies, melatonin suppression occurs at the minimum light levels tested, and, in better-studied groups, melatonin suppression is reported to occur at lower light levels. We identify major research gaps and conclude that, for most groups, crucial information is lacking. No studies were identified for amphibians and reptiles and long-term impacts of low-level ALAN exposure are unknown. Given the high sensitivity of vertebrate melatonin production to ALAN and the paucity of available information, it is crucial to research impacts of ALAN further in order to inform effective mitigation strategies for human health and the wellbeing and fitness of vertebrates in natural ecosystems.

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Section: Mammals (Humans) (A) Description Of Studies and Participantsmentioning

confidence: 99%

Section: Number Gender (M F) Age Of Subjectsmentioning

confidence: 99%

Section: Number Gender (M F) Age Of Subjectsmentioning

confidence: 99%

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Light Pollution, Circadian Photoreception, and Melatonin in Vertebrates

et al. 2019

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“…Another important effect of smart lighting on sustainable development without worsening environmental impact is the increase of productivity in human activities [40], particularly factories [41] and office environments [42]. The economic benefits arising from these productive philosophies are an objective of many matters currently developing within the framework of circular economy, whose coupling with lighting is really fruitful, as shown in several studies to date [43][44][45].…”

Section: Non-conventional Uses Of Lightingmentioning

confidence: 99%

The Perspective of Total Lighting as a Key Factor to Increase the Sustainability of Strategic Activities

Peña-García

Salata

2020

Sustainability

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In the last decades, lighting has evolved from a branch of engineering ensuring safety and performance in indoor and outdoor installations, to a key discipline interacting with a wide spectrum of fields and having a deep impact on our daily lives. Although this evolution also applies to other areas of knowledge, the special features of lighting make its potential and also its limitations different. It is not the typical field where a well-established mathematical framework allows a departure from well-defined input and identifying clear effects and conclusions. The reason is that lighting is a field dealing with the interaction between a physical phenomenon and a physiological and psychological system, the human being. In addition to the complexity of its basis, the relationship between lighting and sustainability has become stronger in recent years. This relationship is bi-directional in some cases: on one hand, advanced societies require more and more complex lighting installations, which means high energy consumption, use of raw materials, financial costs, manufacturing and maintenance processes, waste and emissions to the atmosphere. On the other hand, good lighting has an impact on issues like productivity, well-being, happiness, disease avoidance, safety, and many other qualitative aspects whose direct or indirect impact on sustainability is remarkable. This work will analyze how lighting can give answers to questions related to sustainability, not only from the classic topics of energy consumption and waste management, but from a wider and global perspective. The results of these works are analyzed, and the basis of the new framework of total lighting, discussed.

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“…Finally, color temperature is gaining interest in literature and its influence on mood, cognitive performance, and satisfaction has been deeply investigated in the last years [44]. In particular, it is interesting to consider how color temperature influences melatonin production and therefore human alertness and response [45]. It is important to recall that all visual stimuli affect human comfort following three different routes: the visual system, the circadian timing system, and mood and motivation [46].…”

Section: Quantitative Parametersmentioning

confidence: 99%

A Novel Approach for the Definition of an Integrated Visual Quality Index for Residential Buildings

2019

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Visual quality is an important component of indoor environment quality and greatly affects inhabitants’ perception of the living space. Nevertheless, the lighting design of residential buildings is usually underestimated by both designers and standards. This paper presents an integrated index for evaluating the visual quality of an indoor environment in residential buildings. The main parameters considered are daylight access, probability of glare from daylight and electric illumination, maintained illuminance, and color temperature. These aspects are evaluated throughout a whole year using a fixed set of metrics and are combined using relative weights. It was decided to also consider qualitative parameters in order to give more importance to some psychological aspects of visual comfort. Finally, the building visual quality index is obtained by a weighted average of the results of each room with the addition of the qualitative parameters. The applicability of the index was tested through the simulation of a dwelling that will be built and monitored in the context of the Comfort for Sustainable Buildings in the Alps (CASA) research project. The building visual quality index proved to be useful during the design process, allowing for improvements in both electric illumination and daylight access through a comparison of different solutions. This study could represent a step towards the holistic evaluation of indoor environment quality.

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Effect of color temperature on melatonin production for illumination of working environments

Cited by 29 publications

References 40 publications

Light Pollution, Circadian Photoreception, and Melatonin in Vertebrates

Light Pollution, Circadian Photoreception, and Melatonin in Vertebrates

The Perspective of Total Lighting as a Key Factor to Increase the Sustainability of Strategic Activities

A Novel Approach for the Definition of an Integrated Visual Quality Index for Residential Buildings

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