Given that participants were simply reading, an activity most people would classify as relaxing, the fact that the e-book has an alerting effect shows just how much light alone can influence sleep and sleepiness.
Ikizingatiwa kuwa washiriki walikuwa wakisoma tu, shughuli ambayo watu wengi wangeiainisha kuwa ya kustarehesha, ukweli kwamba kitabu cha kielektroniki kina athari ya kutahadharisha inaonyesha ni kiasi gani cha mwanga pekee kinaweza kuathiri usingizi na usingizi.