Smartphones deliver light to users through Light Emitting Diode (LED) displays. Blue light is
the most potent wavelength for sleep and mood. This study investigated the immediate …

Smartphone usage strongly increased in the last decade, especially before bedtime. There
is growing evidence that short-wavelength light affects hormonal secretion …

Background: It has been shown that short-wavelength blue component of the visible light
spectrum can alter the circadian rhythm and suppress the level of melatonin hormone. The …

Many people spend an increasing amount of time in front of computer screens equipped
with light-emitting diodes (LED) with a short wavelength (blue range). Thus we investigated …

Background The use of electronic devices emitting blue light during evening hours has been
associated with sleep disturbances in humans, possibly due to the blue light-mediated …

The use of light-emitting electronic devices before bedtime may contribute to or exacerbate
sleep problems. Exposure to blue-wavelength light in particular from these devices may …

The use of electronic devices with light-emitting screens has increased exponentially in the
last decade. As a result, humans are almost continuously exposed to unintentional artificial …

Ab] stract Consumer electronic devices play an important role in modern society.
Technological advancements continually improve their utility and portability, making …

This study was designed to explore the roles that long-and short-wavelength lights have on
momentary mood and alertness at night. Twenty-two subjects participated in a mixed-design …

There are studies reporting the negative impact of smartphone utilization on sleep. It is
considered that reduction of melatonin secretion under the blue light exposure from smart …