Research perspectives of the influence of lighting modes on changes of human functional state by means of “smart lighting”

In studies of non-visual lighting effects conflicting results are frequently obtained. We suppose that such individual differences can be related to the initial functional state, as well as to the individual type of response to light exposure. This raises the question of the need to develop methods for express-diagnosis of functional state in response to a standardized light exposure. Our results show that the effect of fatigue during mental workload can be detected by measuring the critical flicker fusion frequency for light with the specific colors and brightness levels. However, the reliability of this method is difficult to estimate because of the different brightness of LEDs of different colors. We believe that the using of a “smart lighting” devices, allowing obtaining specific color and brightness by mixing individual colored LEDs, will overcome this limitation.