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- Favero, Federico, 1978-, et al.
(author)
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NATURAL EXPERIMENT ON THE EFFECT OF ARTIFICIAL LIGHTING AND DAYLIGHT
- 2014
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In: PROCEEDINGS of CIE 2014 "Lighting Quality and Energy Efficiency”. - Vienna, AUSTRIA. - 9783902842497
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Conference paper (peer-reviewed)abstract
- We investigated the effect of the exposure to daylight and artificial light indoor during Scandinavian winter. Twenty-one subjects experienced two radically different lighting solutions for three days in a row, eight hours each day: one group (n=12) was exposed only to daylight, one (n=9) only to artificial electric lighting (>500lx average on work plane, 3000K). We observed an effect between light conditions on mood, which was elevated in the daylight room. Mean levels of alertness and perceived energy ratings were higher in the daylight condition. An effect of the lighting condition was found for activity levels as measured by the actigraphs, especially in the morning. Due to the experimental design it is at present difficult to tease out if observed effects were due to the lighting exposure or to other environmental factors, e.g. architectural layout, timing or intensity of the exposure, therefore future further studies would be needed to examine different combinations of factors.
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| 2. |
- Govén, Tommy, et al.
(author)
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Energy Efficient and Study Promoting Lighting at High School: Preliminary Results
- 2014
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In: [Host publication title missing]. - 9783902842497 ; , s. 772-779
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Conference paper (peer-reviewed)abstract
- Abstract in UndeterminedA correct lighting solution guarantees appropriate working conditions, while saving energy. Today it is well-known that the light influences our visual perception, our emotions and our biological system, thus our health and productivity. Four identical classrooms of a high school in Helsingborg, Sweden, were equipped with two different lighting concepts: classic pendants with T5 fluorescent tubes and a new diffuse light LED system. A grand total of 72 students aged between 17 and 18 years, were occupying the rooms over the academic year. The light environment, the electricity consumption, the students’ feelings and their circadian rhythm were monitored. Compared with the fluorescent installation, the LED system appears to do not have negative effects on the students, all the while saving energy.
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