Here's a breakdown of the annual electricity cost, based on the Department of Energy's 2007 national average price for energy of 10.65 cents per kilowatt-hour. The researchers assumed eight hours of TV watching per day.
* 36-inch picture tube TV: $50
* 40-inch LCD TV: $55
* 56-inch rear projection TV: $65
* 52-inch LCD TV: $70
* 50-inch plasma TV, 720p (lower resolution): $80
* 50-inch plasma TV, 1080p (highest resolution): $110
Source: Consumer Reports