Modulation of fluorescent light : flicker rate and light source effects on visual performance and visual comfort

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TypeArticle
Journal titleLighting Research & Technology
Volume27
Issue4
Pages243256; # of pages: 14
SubjectLighting; Lighting and health; Fluorescent lighting; Eclairage
AbstractThe effects of fluorescent light spectral composition and flicker rate on visual performance and visual comfort were studied on 48 undergraduate students using two different rates of flicker: conventional low-frequency flicker (120 Hz) and high frequency flicker (between 20-60 kHz); and three different light sources; full-spectrum lamps, cool-white lamps, and filtered-cool-white lamps. The design was a 2 x 3 (Flicker Rate X Light Source) mixed within-between ANOVA. Visual performance and time on visual performance task were assessed using a Landolt ring task. Visual comfort was assessed by self-report after a period of reading difficult text. Visual performance scores of 18-24-year-old male and female university students were significantly higher in the high-frequency flicker condition than the low-frequency flicker condition. Therewere no other statistically significant effects. Health status was unrelated to visual performance. Neurophysiological explanations are discussed. The finding that an energy-efficient means of driving fluorescent lamps also can improve visual performance provides added impetus to adopt this new technology.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
NoteAlso presented at the Canadian Psychological Association 1995 Annual Convention, Charlottetown, PEI, June 15-17.
Peer reviewedYes
NRC number38944
5645
NPARC number20375194
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Record identifier33a6829d-4261-423c-a2dd-ebcd289d5cea
Record created2012-07-23
Record modified2016-05-09
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