Let there be lights: plugging Progress Energy into Duke Energy will create the nation's largest utility. Here's what it will look like.

• Position: FEATURE

Jim Rogers will hand over Duke Energy's CEO job to Progress Energy CEO Bill Johnson and become executive chairman of the combined company, which be based in Charlotte.

Charlotte-based Duke Energy Corp.'s $26 billion purchase of Raleigh-based Progress Energy Inc. is expected to close by year-end.

Combined, Duke and Progress will be the largest U.S. investor-owned power utility in amount of electricity sold to retail customers and revenue from it. Company 2009 revenue (billions) 1. Duke Energy Corp. * $17.7 2. Southern Co. 13.4 3. PG&E Corp. 11.6 4. FPL Group Inc. 11.5 5. American Electric Power Co. 10.4 6. FirstEnergy Corp. 9.8 7. Exelon Corp. 9.5 8. Edison International 9.5 9. Consolidated Edison Inc. 7.8 10. Entergy Corp. 7.3 * Pro forma With Progress, Duke, which ranked 181st on the Fortune 500 last year, would have come in at No. 109, just after McDonald's. Company 2009 revenue (billions) 101. Staples Inc. $24.3 102. Google Inc. 23.7 103. Macy's Inc. 23.5...