Effects of illuminance distribution, color temperature and illuminance level on positive and negative moods

Abstract

This study investigates how artificial lighting affects people's positive and negative moods, and ascertains the features of lighting environments that more effectively increase positive moods or heal negative moods. The evaluation techniques are subjective evaluation (POMS and VAS). This study discusses 10 lighting environments, which contain different color temperatures, illuminance levels and illuminance distribution types. The findings showed that general lighting can increase people's positive moods to a higher level; however, indirect/ambient lighting is better able to reduce people's negative moods. As to color temperature, 2700K is more advantageous to moods than 6500K in direct/central and indirect/ambient lighting. However, color temperature has very little impact on moods in general lighting. As for illuminance level, moods between 780lx and 1500lx were insignificant. These findings mean that the single factor of lighting may not be influential. The interaction effect of lighting factors plays an important role in moods.