期刊名称：Applied human science : journal of physiological anthropology
印刷版ISSN：1341-3473
电子版ISSN：1341-3473
出版年度：1997
卷号：16
期号：5
页码：199-204
出版社：日本生理人類学会
其他摘要：In order to investigate the physical, economical, physiological and psychological aspects regarding ancient lighting, two series of experiment were performed. At first a darkroom (1.3×4.5 m, Ht: 2.7m) was constructed. In experiment I, illuminance and consumption rate of fuel were measured. The Japanese classic candle, plant oil and animal fat yield I.12, 0.30-0.62 and 0.05 Iux at 1.0 m distance, respectively. The illuminance was reduced to about 50% by andon 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 Iux. It needed more than 1.44 Iux to read a newspaper.In the color discrimination test, yellowish green was most difficult, silver or long wave range colors were easy.
