" Other simple practices? Supply all patients with earplugs and a face mask when they first come onto a ward, just like the complimentary air travel bag you are given on long haul flights. Use dim non-LED lighting at night and bright lighting during the day. This will help maintain strong circadian rhythms in patients, and thus a strong sleep wake pattern. "

― Matthew Walker , Why We Sleep The New Science of Sleep and Dreams / Why We Can't Sleep Women's New Midlife Crisis