The TCL 5-Series is the energy-efficiency champ among the 55” and 65” models we researched. It expends fewer watts per inch of screen size than other 4K TVs, and in our research, it was bested only by standard HD TVs, which have far fewer pixels to light.
An OLED screen uses about twice as much energy as a regular LED screen, though, and Ultra HD or 4K displays also eat up energy. So, unless you're really going for the top spec. TV, stick with a standard HD LED TV to save energy and electricity costs.
What type of TV is more energy efficient? The simple answer to this question is that an LED TV will be more efficient than both LCD and plasma displays. LCDs are the next most efficient, followed by plasma displays.
LED televisions are far more energy efficient than backlight LCDs. ... Additionally, LEDs are inherently a more efficient light source than heated fluorescent tubes and are slowly being introduced into other screen technologies to reduce costs.
The list of most energy efficient TVs in 2019 are: TCL 32S305 32-Inch 720p Roku Smart LED TV (2019 Model) TCL 40S305 40-Inch 1080p Roku Smart LED TV (2019 Model) TCL 43S405 43-Inch 4K Ultra HD Roku Smart LED TV (2019 Model)
For instance, the larger the screen size, the greater the energy use when the TV is turned on and displaying a picture (active mode). Today's big-screen TVs and all of the connected components can add nearly $200 to your annual energy bill, according to the U.S. Department of Energy.
According to recent studies, 4K TVs use on average 30 percent more power than 720 or 1080 HD TVs. Factor this startling figure against the predicted number of 4K TVs finding their way into US homes, and you could be looking at a combined increase in residential energy usage of more than a billion dollars.
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But a 55” LED TV uses about 57 watts or 2x the amount of electricity as a 32” TV (though still very little electricity). All this is to say, even with the bigger models, the average LED or LCD TV probably uses between 30 and 100 watts of electricity.
Energy-efficient backlighting allows LED televisions to have energy consumption of up to 40 percent less than LCD televisions and significantly less than a plasma screen.
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