Research results: Proper lighting increases well-being
Just in time OSRAM and the “Bergische Universität Wuppertal” presented interesting research findings – which show that the winter blues can be fought effectively with the right light.
Being more awake during the day and having a quieter and deeper sleep at night can considerable increase a person's well-being during the dark time of the year. This is the result of a study conducted by Prof. Dr. Jarek Krajewski from the “Bergische Universität Wuppertal” for which OSRAM lighting solutions were used in the "Jammertal Golf und Spa Resort" wellness hotel in Datteln, Germany.
Half of the total number of 80 probands was exposed to the normal lighting conditions typical for a hotel. The other half spent their two-day stay under lighting conditions similar to the natural sky which activate the human body during the day and allow it to get tired in the evening. This group was able to concentrate better during the day and suffered less from sleeping problems at night. Long-term ECGs were carried out, motion sensors were applied, and the stress hormone cortisol as well as the sleeping hormone melatonin measured during the test.
"The results clearly demonstrate that we can also prevent winter tiredness in our own homes", emphasized OSRAM biologist Dr. Andreas Wojtysiak. "During the day it is important to provide sufficient light in cool color temperatures – e.g. the light produced by fluorescent lamps or LEDs with a bluish daylight white light color – because they have a stimulating effect. However, lamps with a low proportion of blue in the light spectrum should be preferred in the evening hours – such as halogen lamps or LED lamps with a reddish warm-white light color – because they allow the human body to get tired. In general, what matters in winter is to spend as much time as possible in the open air – natural daylight is ideal for our body."
In short: Light tips to fight the winter blues
During the day
• Important: Make sure you are exposed to a sufficient amount of light with a cool color temperature!
• The right illuminant: Fluorescent lamps or LEDs with a bluish daylight white light color
In the evening
• Important: Use lamps with a low proportion of blue light!
• The perfect illuminant: Halogen lamps or LED lamps with a reddish warm-white light color
• Important: Spend as much time in the open air as possible to benefit from natural daylight!