“Peter Raynes, professor of opto-electronic engineering at the University of Oxford, says modern LCD screens use a similar amount of power to bulky old cathode ray tube (CRT) televisions.”
“This says that, on average, the power consumption of a cathode-ray screen is 3.4 watts per screen inch, while plasma uses 9.4 watts per screen inch - based on figures from 2005.”
http://news.bbc.co.uk/2/hi/uk_news/magazine/6188940.stm
The original ENERGY STAR® rating for TVs only measured standby power (the amount of power the set consumes when it’s turned off), which accounts for a small fraction of the power TVs consume. The ENERGY STAR 3.0 rating, which took effect on November 1, 2008, also factored in power consumption when the TV is on, providing a much clearer idea of how much power a TV uses.
Version 4.1, which takes effect on May 1, 2010, sets a more stringent standard for on-mode power consumption. It promises consumers a savings of 40 percent over models currently on the market. Version 5.1, which takes effect on May 1, 2012, promises a savings of 65% over sets that were on the market prior to the debut of the version 4.1 standards.
So I am a year ahead of my time hippie;-)