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Can the Valkee 2 ease jet lag by lighting up ears? It didn't for me | Gadgets | The Guardian
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medical science - Do Valkee bright light headsets reduce SAD symptoms? - Skeptics Stack Exchange
Can the Valkee 2 ease jet lag by lighting up ears? It didn't for me | Gadgets | The Guardian
The Valkee conundrum: I've been shining bright light on my brain for weeks now, and I don't know why - Tech.eu
