Olga Kombeiz, Anna Steidle, Erik Dietl

• How can the physical environment, especially light, facilitate conflict resolution? Previous research has led to no clear answers about optimal lighting conditions in conflict situations and, until now, potential moderators and mediators have been scarcely investigated. Building on research on light-induced cooperativeness, we expected that self-oriented individuals would be influenced by the lighting in social situations such as conflict resolution. In self-oriented individuals, dim warm light should promote interdependent self-construal and, in turn, lead to a preference for collaborative conflict resolution strategies. Two studies confirmed our assumptions, with social dominance orientation and trait interdependent self-construal serving as indicators of individuals' social orientation. Overall, these results provide an explanation for inconsistent previous findings and contribute to the understanding of light-induced changes in social behavior. Limitations as well as practical implications for lighting design in social spaces are discussed.