I'm mike in Arkansas and I talked to you on the phone about a year ago. I bought the Synergy you make after exhausting research and I stil think it's the best and best deal. This thread got me interested in the inner workings of how long this thing will work. The Plasmafire Dr. says he makes a neon bulb cold corona that is like what Tesla made that still last 80 years later. I want to make a air purifier at home with cold plasma. Can you point me in the direction where can I get more info about how the neon cold plasma works, any books on the subject? Thanks for the Synergy.