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A large television screen will use more power than a small one although the difference isn't great.

A television uses power to process the incoming signals and prepare them to be sent to the display itself. This process is the same, regardless of the size of the screen so it will use the same amount of power for a large or small screen. Processing video signals uses a significant amount of power, especially if it is running an HDTV signal.

The screen itself will use more power as it gets larger. An LCD television requires higher power back lighting as the screen increases in size. A plasma television will use more power to drive the larger pixels. It is this part of the television that will consume additional power as the model increases in size.

As an example, a 32 inch and a 46 inch model from the same manufacturer consume 99 Watts and 131 Watts respectively. Bear in mind that the 46 inch television has a screen that is more than twice the area of the 32 inch.

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