I can't speak for the Plasma, DLP or Projection TV's, but I can say for a fact that my LCD doesn't consume more electricity than a normal CRT TV...in actuality, I believe it takes up less to run....either way, the change is so minute that it really doesn't play a factor.
I went from a 19" CRT TV to a 32" LCD and didn't notice any changes in my bill..
I'm assuming that larger TV's won't be much of an issue either...technology is progressing so fast these days and they're definitely taking power consumption into consideration when producing these big screen models.
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