You are correct, Bob. Some years back, Yardly Beers (I don't remember his call and he's an SK), of Boulder, CO mounted a 100 watt bulb atop a 40 foot telephone pole driven with 5 watts through 100 feet of RG58. It took him three years to earn a WAS and a DXCC. The fete was written up in QST. Like you said, when conditions are good ERP is almost irrelevant.