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Daylight increases our productivity
A field study from USA indicates that employees working by a window have up to 15% increased productivity compared to colleagues further inside the building.
Daylight and productivity – A Field Study
M. Figueiro, MS. Rea, A. Rea; Lighting Research Center, Rensselaer Polytehnic Institute, Troy, NY, USA and R. Stevens, Univ. Of Connectocut Health Center.
Daylight improves your brain capacity, ability to focus, and memory
A scientific study from Switzerland shows that an increase in daylight exposure during the day can improve the brain’s capacity, performance and ability to solve problems with prolonged effect. The study explored the effect after six hours of daylight exposure, or similar light via a specific lamp, against the effect after six hours by traditional office lighting (not daylight). It was shown that subjects working by traditional office lighting became tired and slow, whereas the mind woke up in more than one sense after a day spent by daylight. The effect lasted into the evening.
Effects of prior light exposure on early evening performance, subjective sleepiness, and hormonal secretion
Münch M, Linhart F, Borisuit A, Jaeggi SM, Scartezzini JL.
Behavioral Neuroscience, 2012 Feb;126(1):196-203.
Daylight changes the brain’s speed, reaction time and judgement
This study demonstrated that the wavelength, exposure time and intensity of daylight contribute to change and improve the brain’s working speed, reaction time, emotional responses and general functions, such as judgement and acumen. Particularly the blue part of light had an effect on human behaviour.
Light as a modulator of cognitive brain function
Vandewalle G, Maquet P, Dijk DJ.
Trends in Cognitive Science, 2009 Oct;13(10):429-38.
Daylight improves intelligence, physiology, and our circadian rhythm
Daylight offers the brain better work conditions, because it optimizes our 24-hour circadian rhythm. This is measured by the brain’s performance and intelligence. Applying several physiological and behavioural study parameters, the research team from Switzerland have demonstrated that daylight optimizes the body, brain, consciousness and mind.
Can light make us bright? Effects of light on cognition and sleep
Chellappa SL, Gordijn MC, Cajochen C.
Progress in Brain Research, 2011;190:119-33.
Want to know more about our inbuilt body clock?
Thanks to our modern lifestyle, most people suffer from some degree of light deprivation and an unbalanced circadian rhythm. This is characteristic of the Northern latitudes where the winters are especially dark, but also in more sunlit parts of the world, people working indoors typically don’t get enough daylight. For instance, in San Diego, California, the average citizen gets less than one hour of daylight per day.
It is becoming increasingly clear that numerous biological processes in the human body depend on sufficient exposure to the right types of light. Extensive research is currently conducted into the effects of light on our mental and physical wellbeing, in particular of the blue part of daylight.
Daylight stimulates, influences and controls many of our physical and mental processes: Sleep, Energy level, Brain activity, incl. ability to concentrate, Mood, Digestion and the Circadian rhythm.
Avoid daylight at bedtime for better sleep
Using smartphones and tablets right before bedtime or in bed pose a risk to our ability to fall asleep and to the sleep quality. Daylight is beneficial and necessary during the day, but very unhelpful at any other time.
The impact of self-luminous displays on evening melatonin levels
M. Figueiro, MS. Rea; Lighting Research Center, Rensselaer Polytehnic Institute, Troy, NY, USA.