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A recent study has demonstrated that artificial lighting simulating daylight was able to increase concentration and cognitive performance in students. The so-called “biologically-optimized” lighting used in the study was produced by combining blue and white LEDs. The study investigated the effects of light on the performance of students at two schools in Ulm, Germany. It was carried out by the ZNL TransferZentrum für Neurowissenschaften und Lernen (Transfer Centre for Neuroscience and Learning) in conjunction with lighting manufacturer Osram between November 2011 and February 2012. The results showed that students working under biologically-optimized classroom lighting achieved better results than the comparison group in standardized tests for concentration ability, and their performance speed also increased.