Hard to say, there is the security I now do, 4 screens on one huge monitor, meanwhile my editing job with a break for a min. or two to place a request on my favorite radio station (Satellite Guys Radio), answer my smart phone, respond to a text from a friend, look up phone numbers, Holy Cow! if that stuff caused cancer I couldn't be typing this today! I never really thought about it but I even eat in front of my computer and have my tablet and smart phone next to the bed when I sleep! No wonder I have to wear glasses! LOL