Lifetime running costs
All the plasma TV manufacturers hide this well (deliberately?. It's never in the specifications) but if you dig into the manuals where I guess they are legally required to state it, you can find the power consumption of say a 46" plasma (TH-46PZ81B).
So it uses 480 watts x 100,000 hours (excluding the 35 watts it can use while in standby) which comes to an eye watering , 48,000,000 watts or 48,000 kilowatts!