Visual Impression of Lighting from a Window and a Ceiling: a Comparison between the Compound Lighting and the Uniform Lighting

The purpose of this study is to understand the change of impression by comparing the uniformity lighting with the compound lighting. The experiment is carried out with the two scaled-models that were supposed to be an office space. One is lit by the uniform lighting and the other by the compound lighting. Subjects were asked to evaluate the point of difference by semantic differential rating on their overall impression after comparing with two rooms. The results showed that the impressions of compound lighting were more positive score than that of uniformity lighting on the items of ‘dim-bright’, ‘dislike-like’, ‘artificial-natural’ and ‘closed-open’, and that there was no significant difference in impressions between two spaces on other items.