Guide
How much power does a 55-inch TV use?
A 55-inch TV does not have one fixed power number. Real consumption depends on panel type, brightness, HDR use, and how many hours the screen stays on each day.
Short answer
The practical way to judge a 55-inch TV is to estimate running cost over a month or a year, then compare it with a 65-inch model if you are thinking about a bigger screen.