Within these averages there are significant differences and knowing where your child or teen falls within these ranges is the first step in understanding whether or not you want to adjust the amount of time they spend online, or if you suspect a larger problem is brewing. A full 21% of youth are defined as heavy media users who spend more than 16 hours with media a day. Another 63% are defined as moderate users who use media 3-16 hours a day. Youth who fall into the light user category are those who consume less than 3 hours of media a day.