U.S. power companies say the early onset of Daylight Savings Time in the U.S. this year resulted in no major power save:
"We haven't seen any measurable impact," said Jason Cuevas, spokesman for Southern Co., one of the nation's largest power companies, echoing comments from several large utilities.
That may come as no surprise to the Energy Department, which last year predicted only modest energy savings because the benefits of the later daylight hour would be offset.
For example, households may draw less electricity for lights at night, but will use more power in the early in the day as they wake to darker and chillier mornings.
Residential lighting comprises only about 10 percent of the average homeowner's electricity use, while air conditioners, heaters and refrigerators consume much more power. Washers, dryers and plasma televisions are also bigger users of electricity than lighting.