From the paper itself (highlight mine): > During LE-eBook reading sessions, the light-emitting device was set to maximum brightness and placed in a stand that

From the paper itself (highlight mine): > During LE-eBook reading sessions, the light-emitting device was set to maximum brightness and placed in a stand that held it at a fixed angle. This stand was placed on a table directly in front of the individual at a 30- to 45-cm distance from their eyes. Participants were allowed to turn pages on the LE-eBook, but were asked not to hold it while reading or make any adjustments to the settings. During the printed book reading sessions, participants were allowed to hold the book at any desired distance from their eyes. Is this anything new anyways? Shining bright blueish light into people's eyes before bedtime has got to be a well researched topic already. This feels like media-tailored hype while a simple "yes, back-lit ebook readers use this kind of light so those existing findings apply" would have sufficed.