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A Blue-Enriched, Increased Intensity Light Intervention to Improve Alertness and Performance in Rotating Night Shift Workers in an Operational Setting
Brighter Blue-Enhanced Light to Boost Alertness and Performance in Rotating Night Shift Workers
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Abstract
A 4.5-fold increase in melanopic illuminance significantly improved alertness and performance in night shift workers.
- Exposure to higher intensity, blue-enriched lighting led to significant improvements in subjective sleepiness and reaction times during night shifts.
- KSS scores and mean reaction times on the Psychomotor Vigilance Task were significantly better during the lighting intervention compared to traditional lighting.
- The number of lapses in reaction time on the PVT also decreased significantly with the blue-enriched lighting condition.
- No significant differences in self-reported mood were observed between the two lighting conditions.
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Key numbers
22.4 ms
Decrease in PVT Reaction Time
Measured at the end of the night shift under intervention lighting.
1.9
Reduction in PVT Lapses
Average number of lapses at the end of the shift compared to traditional lighting.