In a psychomotor vigilance task (PVT), reaction time and attention lapses were significantly improved when supplemental lighting with high melanopic luminance was used
Specifically, the baseline-adjusted PVT reaction time was 11 ms shorter, representing moderate to high efficiency. In addition, there were 0.9 fewer lapses of attention during the eight-hour exposure to supplemental lighting, which also represents moderate to high efficiency. The results of the study suggest that supplemental lighting with high mEDI can improve neurobehavioural performance, including alertness and reaction time.
Subjective ratings of drowsiness, alertness, happiness, health, mood and motivation were significantly improved using supplemental lighting compared to the control group
Subjective drowsiness was on average 0.5 points lower. Other subjective indicators also showed positive values throughout the exposure to high melanopic efficacy lighting.
