I wasn't talking about light bulbs, the light coming from screens on TV's, phones and monitors is different than a 60 watt light bulb in the bathroom or bedroom. Go brush your teeth, read a book, make some caffeine free tea or prepare your lunch for tomorrow. Don't just shut off stuff or get out of your computer chair and climb into bed. Routines help, get the body prepared to sleep. Don't use your cell phone and set the alarm as you go to bed. And don't lie in bed and text or read an email. Make the bedroom a place of rest and relaxation.