The days when TVs came in only two types, color or black and white, are long gone. Today, TVs use several different technologies and each technology has different levels of energy efficiency. Many people change their TVs because they want a bigger screen, but bigger TVs use significantly more energy. The United States Department of Energy estimates that the energy used by TVs in America is enough to power a home in the state of New York for a year. Giant plasma screen models can be the most energy-hungry appliance in a home. One major factor in TV power usage is the picture setting, and changing the picture setting on a TV can make a surprising difference, sometimes reducing total energy use by up to 50%. On the other hand, a 52-inch LCD uses twice the power of a 32-inch model.