On average Plasma TVs use more than twice the power of 32-inch LCD screens and 2.5 times as much as conventional 32-inch widescreens. Admittedly part of that reason is their larger size (Plasma TVs tend to be 42-inches) but even similar sized LCD screens use less power than 42-inch Plasma sets.

The smaller the screen, the less power it uses. On average, a 26-inch LCD TV screen uses less than 90 watts when switched on and costs £13 a year to run. A 40-inch LCD uses almost 100 watts more power and costs twice as much to run.