Journal article

A Blue-Enriched, Increased Intensity Light Intervention to Improve Alertness and Performance in Rotating Night Shift Workers in an Operational Setting

Tracey L Sletten, Bhairavi Raman, Michelle Magee, Sally A Ferguson, David J Kennaway, Ronald R Grunstein, Steven W Lockley, Shantha MW Rajaratnam

NATURE AND SCIENCE OF SLEEP | DOVE MEDICAL PRESS LTD | Published : 2021

Abstract

Purpose: This study examined the efficacy of a lighting intervention that increased both light intensity and short-wavelength (blue) light content to improve alertness, performance and mood in night shift workers in a chemical plant. Patients and Methods: During rostered night shifts, 28 workers (46.0±10.8 years; 27 male) were exposed to two light conditions each for two consecutive nights (~19:00-07:00 h) in a counterbalanced repeated measures design: traditional-spectrum lighting set at pre-study levels (43 lux, 4000 K) versus higher intensity, blue-enriched lighting (106 lux, 17,000 K), equating to a 4.5-fold increase in melanopic illuminance (24 to 108 melanopic illuminance). Participant..

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University of Melbourne Researchers

Grants

Awarded by National Health and Medical Research Council (NHMRC)


Awarded by Australasian Sleep Trials Network (NHMRC Enabling Grant)


Awarded by NHMRC Senior Principal Research Fellowship


Funding Acknowledgements

This research was supported by the National Health and Medical Research Council (NHMRC) project grant (#545871) and was endorsed by the Australasian Sleep Trials Network (NHMRC Enabling Grant #343020). The study sponsor had no role in the study design or preparation of the manuscript. RRG is a recipient of a NHMRC Senior Principal Research Fellowship (#1106974). aPresent address for Michelle Magee: Centre for Neuroscience of Speech, Melbourne School of Health Sciences, Parkville, The University of Melbourne, Victoria, Australia.