The lights are back on in Warren County after the worst ice storm in 17 years plunged more than half of Caney Fork Electric’s customers into the dark, some going a couple of days without power.“We had a wonderful day Wednesday,” said Caney Fork general manager Bill Rogers. “We left here at 11 p.m. to get some sleep and there were just a handful of customers still out.”Rogers said Caney Fork began Wednesday with 2,500 customers without power and the forecast temperatures would dip below zero after sunset.“We had problems in every corner of our system,” Rogers said, noting Caney Fork serves four full counties, including Warren, and four partial counties. “At its height, we had around 9,000 customers out, but in all there were 15,000 to 17,000 customers affected at one time or another.”Rogers noted there are 32,000 Caney Fork subscribers, meaning more than half of its customers were affected by Monday’s ice storm.