We often associate sleep problems with the blue light from our electronic devices during late-night scrolling.  However, our exposure to artificial blue light before bed might not be as significant a cause as we believe. The amount of blue light emitted by smartphone screens is relatively small compared to sunlight, with increasing evidence suggesting that claims about its impact on sleep are exaggerated. Scientist Mariana Figueiro at the Icahn School of Medicine at Mount Sinai studied how light affects health and found that various factors influence how pre-bed screen time impacts sleep. Figueiro suggests that there is limited evidence regarding blue light exposure's suppression of melatonin, the hormone responsible for inducing sleep. According to some of Figueiro's research, the duration of device use, its proximity to your eyes, and its brightness may affect your ability to fall asleep. Figueiro's 2013 study found that using an iPad at full brightness for two hours caused a slight drop in melatonin levels, whereas using it for one hour had no effect. Some research suggests that increased sunlight exposure during the day can decrease the likelihood of experiencing an energy dip in the evening. Although blue light from smartphone screens isn't a major concern, it's still recommended to avoid looking at screens before bed for other reasons, such as the type of content you're consuming. Reading work emails before sleep can cause anxiety, which is closely linked to insomnia, so it's best to keep your phone out of reach and silence notifications when you're going to sleep.