Is it worth it? Yes. Especially if you haven’t bothered to go into the menu to adjust brightness and contrast since you installed it. In stores, basic marketing decrees that televisions be set to maximum brightness so that the screens are bright and colourful and capture the buyer’s attention. The first thing to do when you get home after buying it is to turn down the brightness. Too much brightness is not only bad for your electricity bill. It’s also bad for your eyes—your pupils have to strain to adapt. So, what's the right setting? About 60%, or even half. According to a report prepared by the environmental organization WWF, television accounts for an average of 13% of household energy expenditure . By doing this you can significantly reduce the bill.