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My impression was that he was using watts as J/s. -That this is the average power needed to run a particular lifestyle. Like a living American is equivalent to a 11000 watt bulb (turned on).
So, I guess that would be about 9.5 x 10^8 joules per day? I agree that it's poor language choice to say 'needs x watts'. Maybe 'consumes energy at a rate of x watts'?