Smartphones, tablets and e-readers have made modern life the kind of speedy, all-access convinience Gene Roddenberry conceived of in his 1960s Star Trek program. But health experts warn that the proliferation of these handy e-devices comes to the flip side: impaired sleep for children and adults, and a possible connection between poor sleep and symptoms that are remarkably similar to attention-deficit hyperactivity disorder (ADHD).

Light is a type of medicine. Take light therapy, for example, which can help people that suffer from seasonal depression. Proper light exposure can help boost sleep, performance and increase energy levels. However, because today’s world is full of electronic devices, being too lit-up has a downside, which can negatively affect your overall health and sleep.