Orlando Sentinel: Floridians give little thought to running up their power bills. They leave lights on, set thermostats on chilly and shower until the hot water is gone. Many have no clue whether their homes are energy gluttons. Energy ignorance, however, is starting to hurt. Electricity prices are on a climb that could last for years because of environmental regulations to address global warming and because of jumps in prices for power-plant fuels. In the span of six months, Orlando Utilities …