Linda Geddes, journalist in the UK, published an article in the Guardian titled “No more snooze button: a complete guide to waking up feeling fantastic“. “Now the clocks have gone back and the days are getting shorter, it can be hard to get out of bed. But, from dawn simulators to a regular wakeup time, here are 16 ways to start the day well”, is what they promise in the introduction. Chrono@Work advised on the scientific background of using wake-up lights, also called ‘dawn simulators’. Two scientific papers were published earlier by Chrono@Work employee Marina Giménez and colleague Maan van de Werken, both working at the University of Groningen at that time, showing that the use of a dawn simulator indeed reduces sleep inertia, but did not shift the biological clock. There was an acute effect on waking up processes such as thermoregulation with, by other scientists confirmed, improvements in daytime well being and performance. Higher light intensities after waking up are needed to shift the clock, published by Chrono@Work employee Moniek Geerdink.