@article{ref1,
title="Psychophysiological effects of coloured lighting on older adults",
journal="Lighting research and technology",
year="2009",
author="Laufer, L. and Láng, E. and Izsó, L. and Németh, E.",
volume="41",
number="4",
pages="371-378",
abstract="This paper examines the psychological and psychophysiological effects of blue light exposure — as compared to red light exposure — on older adults during the day. The blue lighting was found to be significantly more activating and more unpleasant than the red lighting. The mid-frequency high-frequency ratio of the heart period variability slightly decreased under blue lighting indicating an increase of parasympathetic modulation in this lighting condition compared to red lighting.<p />",
language="",
issn="1477-1535",
doi="10.1177/1477153509336803",
url="http://dx.doi.org/10.1177/1477153509336803"
}