2012 Fiscal Year Final Research Report
Development of a map of the electricity wastage for night time lighting and a method for predicting the frequency of light pollution by using celestial images
| Project/Area Number |
23656351
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Architectural environment/equipment
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| Research Institution | Tokai University |
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Principal Investigator |
IWATA Toshie 東海大学, 工学部, 教授 (80270627)
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| Co-Investigator(Kenkyū-buntansha) |
ITO Daisuke ものつくり大学, 技能工芸学部, 講師 (10567978)
NAKAJIMA Takashi 東海大学, 情報理工学部, 教授 (70408029)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 光害 / 上方光束 / 天空輝度分布 / 雲量・雲高計 / 節電 / 電力消費量 |
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| Research Abstract |
A method for computing the upward flux from cities, which causes light pollution, was developed by using luminance of the night sky and the reflectance and the heights of the clouds. In order to identify the outdoor lighting environment under power shortage triggered by the 2011 Tohoku earthquake, field measurements had been conducted in railway stations. The results showed that nearly 30% of the luminaires was turned off. Based on these results, distribution of the electricity wastage, as well as upward flux, emitted to the sky was illustrated.
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