Does the light incidence affect daytime acute alertness

This study will give insight into the impact of light’s origin on acute alertness during day- and nighttime. The aim of this study is to investigate the impact of at least two very different luminance distributions with the same illuminance and the same melanopic-weighted irradiance at the eye on NIF effects, in this case acute alertness. Whereas the results might be used to validate the impact of light’s origin on a nighttime NIF effect, they will also give insight into the importance of this design parameter on alertness during daytime.