A PILOT EXPERIMENT ON A METHOD FOR EVALUATING ACCEPTABILITY OF A DAYLIT LUMINOUS ENVIRONMENT

1. We propose a hierarchical model as a hypothesis to evaluate comfort in lighting environments. 2. The model consists of physical quantitie s such as stimuli, and visual sensations as the first response, and th en overall evaluation. 3. A pilot experiment in a side-lit classroom u sing 147 subjects was made to examine this model. 4. It was found that in the side-lit classroom the most effective answers for discriminati on between ''acceptable'' and ''not acceptable'' were ''the surface of desk was not considered dark'' and ''not to experience any reflectanc e of lighting on the sheet of paper on which they wrote''. 5. Moreover all of the effective items relate to the task area, namely desk and b lackboard, and this meant that subjects gave priority to workability i n the classroom.