Document Detail

Study on illuminance and visual properties of flammable illumination.
MedLine Citation:
PMID:  9431706     Owner:  NLM     Status:  MEDLINE    
In order to investigate the physical, economical, physiological and psychological aspects regarding ancient lighting, two series of experiment were performed. At first a darkroom (1.3 x 4.5 m, Ht: 2.7 m) was constructed. In experiment I, illuminance and consumption rate of fuel were measured. The Japanese classic candle, plant oil and animal fat yield 1.12, 0.30-0.62 and 0.05 lux at 1.0 m distance, respectively. The illuminance was reduced to about 50% by and on which was a lighting tool of folkcraft. The burning duration of plant oil was about two weeks to 180 ml when it burned 4 hours per one day. In experiment II, 15 young females were examined regarding the visual properties such as visual acuity, readability of newspaper and discrimination of color under the simulated illumination of candle. The visual acuity was 0.42 under 0.16 lux. It needed more than 1.44 lux to read a newspaper. In the color discrimination test, yellowish green was most difficult, silver or long wave range colors were easy.
K Yamasaki; Y Nagai
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Applied human science : journal of physiological anthropology     Volume:  16     ISSN:  1341-3473     ISO Abbreviation:  Appl Human Sci     Publication Date:  1997 Sep 
Date Detail:
Created Date:  1998-02-04     Completed Date:  1998-02-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9506216     Medline TA:  Appl Human Sci     Country:  JAPAN    
Other Details:
Languages:  eng     Pagination:  199-204     Citation Subset:  IM    
Department of Life and Environmental Science, Jissen Women's University.
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MeSH Terms
Color Perception
Discrimination (Psychology)*
Plant Oils
Visual Acuity*
Reg. No./Substance:
0/Lipids; 0/Plant Oils; 0/Waxes

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