Perceived well-being and light- reactive hormones: an exploratory study in office settings.

BORSETTI, H; TONELLO G; TERESCHUK; ML; TONELLO G; TERESCHUK; ML; HERNÁNDEZ, NB; LÓPEZ ZIGARÁN, S; HERNÁNDEZ, NB; LÓPEZ ZIGARÁN, S; BORSETTI, H

LIGHTING RESEARCH & TECHNOLOGY

SAGE PUBLICATIONS LTD

Año: 2018 p. 1 - 22

1477-1535

Light can impact on psychobiological processes in a healthy or harmful way,challenging designers to better understand the resources they are manipulating.The present exploratory study compared two office lighting which differed incorrelated colour temperatures (CCTs) and level. A holistic approach, comprised of visual, emotional and biological dimensions, was used in order to assess thelighting conditions that could favor productivity but also well-being by means of the identification of congruent relationships between objective and subjective measurements in response to light stimuli. The former included analyses of melatonin and cortisol, and the latter were psychological instruments for measuring transitory mood, somnolence, and visual comfort. Controlled experiments were run in laboratory with a repeated measure design, which yielded fifty-six evaluations.Although no extreme ranges of CCTs were used in this study, the spectral bluecomponent present in the CCT of approximately 4000 K, and also provided by theLEDs system at the higher level, could have contributed to render most of thestrong effects as to inter and intra correlations among psychobiological responses. The mediator role of the psychological profile of the individuals was demonstratedby means of the significant predictive value of perceived stress measures.