[MrForbes]

Another thing that doesn't seem to come up in discussions very much is power consumption...for example, a Panasonic plasma 46" model TH-46PZ85U consumes 628 watts, while an HP LCD 47" model LC4776N consumes 320 watts.

Finding power consumption specs for some brands is also rather difficult, you might need to look at the label on the back of the set.

The local Sears store has a rather crowded TV section, with lots of sets on closely spaced shelves. The ambient temperature is pretty high!