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A pilot experiment on a method for evaluating acceptability of a daylit luminous environment

Authors:	Toshie Iwata Miwako Tokura Masanori Shukuya and Ken-ichi Kimura

Institution:	^a Advanced Research Center of Science and Engineering, Waseda University, Okubo 3-4-1, Shinjuku-ku, Tokyo, Japan ^b Toshiba Lighting and Technology Corp., Higashishinagawa 4-3-1, Shinagawa-ku, Tokyo, Japan ^c Department of Architecture, Musashi Institute of Technology, Tamazutsumi 1-28-1, Setagaya-ku, Tokyo, Japan ^d Department of Architecture, Waseda University, Okubo 3-4-1, Shinjuku-ku, Tokyo, Japan

Abstract:	1. 1. We propose a hierarchical model as a hypothesis to evaluate comfort in lighting environments. 2. 2. The model consists of physical quantities such as stimuli, and visual sensations as the first response, and then overall evaluation. 3. 3. A pilot experiment in a side-lit classroom usng 147 subjects was made to examine this model. 4. 4. It was found that in the side-lit classroom the most effective answers for discrimination between “acceptable” and “not acceptable” were “the surface of desk was not considered dark” and “not to experience any reflectance of lighting on the sheet of paper on which they wrote”. 5. 5. Moreover all of the effective items relate to the task area, namely desk and blackboard, and this meant that subjects gave priority to workability in the classroom. Author Keywords: Daylighting; luminous environment; subjective experiment; class-room

Keywords:	Daylighting luminous environment subjective experiment class-room
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