This study follows on the work of John Flynn exploring the influence of light on subjective impressions of an environment. In particular, the study focuses on chromaticity, i.e., color temperature, and light level, illuminance, as two of the parameters that might influence these subjective impressions. Thirty-two subjects rated their impressions on a series of semantic-differential rating scales relative to six color temperatures and three illuminance levels delivered in a classroom-like environment. Additionally, the subjects were asked to rate the perceived difference in chromaticity in a series of paired comparisons on a scale of 1 to 10 to determine how easily the color temperatures were distinguishable from one another for each illuminance level. The results suggest chromaticity has a stronger influence on subjective impressions than could be determined by Flynn, but with trends that differ somewhat with respect to illuminance level. Additionally, the results suggest that color temperatures varied in distinguishability relative to difference in color temperature and to some degree illuminance level.
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