is still slightly warmer than natural north light. However, the most comprehensive study on this topic was done by the University of Vienna in 2019. It divided appreciation further into beauty, emotional arousal and interest, and studied both portraits and abstract art. While the findings for portraits suggest a warmer CCT in line with previous studies, a cooler CCT was preferred for abstract art. References http://vastulab.com/importance-of-north-light-in-building-architect-guide-to-construction/ Architectural design Architectural theory