Earlier, workers reported drowsiness and poorer mood and physical well-being when exposed to electric light compared to daylight
Subjective assessments of research participants showed that while alertness and physical well-being decreased during the afternoon in both lighting conditions, workers felt more tired and drowsy earlier under electric lighting compared to daylight. Deterioration in general well-being was only observed under electric lighting.
Under daylight illumination, the research participants reported higher visual comfort than under conventional electric lighting.
In two real office lighting environments, significantly higher visual acceptability scores were found under daylight conditions than under electric light, despite the absence of a direct view outside. At the same time, subjective glare was lower in daylight conditions than in electric conditions.
