[quote user="Conway"]
And yes, LCD's are alot more power efficient then a Plasma.
[/quote]
Panasonic has done demonstrations in recent years showing that while LCDs consume a constant amount of power - since the backlight is always on - the power consumption of plasmas varies widely according to the brightness of the image on-screen. So running full white, a plasma uses a lot of power, whil darker scenes see the enrgy consumption go down.
Of course it averages out to an extent, and Panasonic was using it as one of a whole load of demonstrations of why it feels plasma is best for larger screen sizes (37in+), but it's not quite as simple as 'plasmas use a lot more power than LCDs'.