Plasma TVs are energy hogs, generating and dissipating a LOT of heat. LCDs are not so wasteful. For example, my 20" LCD monitor operates on 120 VAC, which is then rectified and reduced to 12 & 5 VDC. When you transform a higher voltage to a lower one, you gain a LOT of current. The monitor uses less current, so therefore uses less electricity than that of a Plasma or conventional TV.