Model dynamics for the control and treatment protocols.

<p>The blue strips indicate simulated sleep and green indicate scheduled shift work. The background shades of yellow refer to light intensity at different time of the day: white – bright light of 12 000 lux, bright yellow –5000 lux during morning commute home, yellow –500 lux of the ambient light between 09∶00 and 20∶00, dark yellow –150 lux during the constant routines (hatched bars), control shifts, and ambient light when awake but outside the 500 lux zone. The light gray indicates 25 lux during commutes to work in the night, while dark gray shows darkness during sleep and scheduled darkness in the treatment protocol. Red asterisks show the timings of the core body temperature minimum (<i>t_CBTmin</i>).