Originally Posted by panhead

Corona discharge models produce much more ozone per hour but the manufacturers of corona units neglect to tell consumers how they come about that rating,they test the units for rating at optimum conditions which are at 30% relative humidity or less,in most cases much less,as the relative humidity level increases past 30% the ozone output drops dramatically,a corona discharge unit runs on the basis of static electricity,in a moist enviroment like a grow op they are not the best choice,in a 50% relative humidity grow op the levels are so diminished that they have no advantage over UV models