I first want to emphasize that I do respect the reason for power ratings but they have more to do with interference of other consumer products than exposure to hazardous EMF. It's the standard part 15 of FCC.... Phone, cable, radio, etc. companies are transmitting at levels that make our tinkering look like a joke. If say, a 3 watt Wi-Fi router could cause headaches in 1 out of every 10 people then regular Wi-Fi would be killing people in apartment complexes where they may be getting 20 Wi-Fi routers bouncing at them at optimal angles, etc., amplifying the effect. I am NOT saying I don't respect radio waves and electricity in general, but as a former electronic tech for many years (since age 12 or so, then professionally from 17-36). I can tell you that the world is already full of stuff way more hazardous than what we are putting out.