A lot of people either fall asleep on the couch watching TV or they head up to bed and watch some TV until they fall asleep.  This may not be the best idea.

You may want to shut the television or computer off before you get some shut-eye.  New research suggests it might affect your mental health. A study found that chronic exposure to some artificial light during the night may lead to depressive symptoms in hamsters.

According to the Ohio State University study, hamsters who spent their nights exposed to dim lights - measured as five times brighter than a full moon and about the same light you'd get in urban cities at night or from having a TV on in a dark room - had more signs of depression.

An American Medical Association summary released earlier this year also detailed the negative health effects of nighttime lighting, adding that it disrupted natural sleeping patterns and hormone release.