2016 Yes https://opg.optica.org/oe/fulltext.cfm?uri=oe-24-10-A907&id=340246 Choi, Kyungah Asia Observational Students Elementary (K-5) Test Performance With a comprehensive analysis of the three studies, three lighting presets–3500 K, 5000 K, and 6500 K–are suggested for easy, standard, and intensive activity, respectively. The study is expected to act as a good stepping stone for developing dynamic lighting systems to support students’ performance in learning environments.