It depends where you live. In my country, electricity is pretty pricey, usually higher in the Summer months. Instead of leaving your light turned on all night, switch to a night light or a USB powered light. You can charge those things up and they stay lit all night without utilizing extra electricity. As for the TV, put it on a timer (most models now come with features that allow you to program a sleep timer). Or if you want to be even more energy efficient, you could use an IPAD, Kindle or laptop to watch your programs on.