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Valkee has raised a huge €7.4 million round for its bright-light headsets marketed to treat Seasonal Affectiveness Disorder (S.A.D.). An unnamed "international fund" joined the round, with the current investors participating.    A few of our readers are skeptical of Valkee's claims, but it's tough to say its not a good business. The devices seem to be put toget...

The Finnish Centre for Economic Development, Transport and the Environment organized a user test of bright light devices, and concluded that both the conventional bright light lamps and the new Valkee in-ear bright light headset have a similar positive effect on seasonal winter symptoms, the winter blues. The results of the test reveal that 6-12 minutes treatment with the bright light headset corr...

Everyone has an opinion on Valkee , the headset that shoots bright light into the ear canal to treat and prevent Seasonal Affective Disorder (S.A.D.). It's not unreasonable to have some doubts about the device's claims; the theory that the ear canal contains the path to the brain's photosensitive areas is an odd concept to most laymen. And the device, which has small light bu...