Hi,
I dunno -- I think the Wikipedia is also way off. I'm seeing numbers for worldwide electricity of 17,408 TWh/year (~25% of that is the USA?).
The energy alternatives | The power and the glory | The Economist
There is a graphic ~2/3 the way down.
But, in the text it says the world's population uses 15 terawatts of power -- but it doesn't say the length of time...
I've emailed Guy Dauncey for clarification -- it may be that is should be 120TWh/day?
[Edit: I found another Wikipedia page that pertains directly:
http://en.wikipedia.org/wiki/World_e...nd_consumption