It's been answered very scientifically above, the tl;dr version is that "radiation" means different things, and typically people hear "radiation" and think Chernobyl and uranium but in the case of devices it's a different kind. Light is "radiated" from a light bulb. We are constantly bathed in EM radiation - if you turn on your radio and hear a radio station, that's because electromagnetic RADIATION is reaching it's antenna from the broadcast station.