Mea culpa. 88 kwh is 0.31 GJ, not 0.31 MJ.
Please delete the last message and read
this one instead.
Economists discussing energy-related
issues often use commercial units. Below
is a table of conversion factors given by
H. Geller in his 2003 "Energy Revolution:
Politics for a Sustainable Future" book.
A typical U.S. household consumes about
190 GJ of energy per year (including loses
in electricity production and delivery).
A typical U.S. car or light track consumes about
600 gallons of gasoline per year, equivalent to
79 GJ.
A typical U.S. refrigirator, now in use,
consumes about 3.24 GJ per year (900 kwh).
A 60 W light bulb, used 4 hours per day,
consumes 0.31 GJ per year (88 kwh).
I hope somebody will find this summary useful.
Ludwik Kowalski