Light in the ear has no effect

We have published the first independent study about the Valkee device and showed that light in the ear does not acutely affect human circadian physiology, alertness and psychomotor vigilance performance. The efficacy of the Valkee device is controversial and […]

LIGHTOPIA- Exhibition on Light at the Vitra Design Museum, Weil am Rhein, Germany

We have been involved in contributing to the exhibition with an essay (Beyond our Eyes: The invisible Impact of Light by Christian Cajochen in Essays on the cultural history of light, Volume 1/3, Museum Catalogue) and a presentation on the Effects […]

Release of New Paper causes International Attention

The release of the new paper about the effects of the lunar cycle on human sleep from Prof. Christian Cajochen and his team caused tons of calls and emails from journalists in the last days. Here are some articles:

The […]

Book again available: Chronotherapeutics for Affective Disorders – 2nd Edition

The clinican’s manual for light and wake therapy has been revised by Prof. em. Anna Wirz-Justice and her colleagues. This second edition has now been released.
You can order a copy here.
Chronotherapeutics for Affective Disorders.
A  Clinician’s Manual for […]


Prof. em. Anna Wirz-Justice received this year’s Australian Society for Medical Research medal. She adressed the National Press Club on the topic of chronobiology (watch).
Ammy Appleby on her achievements:
With more than 20 year of research on seasonal affective disorder and […]

Beitrag zu blauem Licht und Schlaf auf

This entry is only available in Deutsch.

Interview in a Swiss newspaper

This entry is only available in Deutsch.

Interview in der NZZ

This entry is only available in Deutsch.

New York Times article

New York Times article on a study conducted at the Centre for Chronobiology in Basel on the effects of light-emitting diodes on circadian physiology and cognitive performance: In Eyes, a Clock Calibrated by Wavelengths of Light (4.7.2011) (PDF)