Effect of Illuminance Uniformity on Paper-Based Reading Performance

Previously the effect of illuminance and correlated color temperature (CCT) on reading performance had been evaluated. However, the influence among uniformity of illuminance, illuminance, and CCT had not been closely taken into account. Therefore, the aim of current study was to investigate how a particular trait of lighting conditions affected reading performance. The indoor lighting environment was conducted with two uniformity of illuminance and two light conditions. Reading tasks of finding out the incorrect characters and grammatical errors in the manuscript were carried out and the brain activities were recorded by electroencephalogram (EEG). The reading performance was evaluated by signal detection theory (SDT). The results showed that the participants performed better under high illumination uniformity and the lighting condition of 400lx and 3000K. According to the results, this study might inspires the design of indoor lighting in workplace so that working efficiency and quality could be further improved.