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.
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