Approx. 250 kWh/month (2 bed/bath apartment billed on Southern California Edison).
A/C in the living room will bump it up in a few months (run it 4-5 hours on hot days).
I'm down to a few dozen incandescent bulbs and will try more efficient types soon (did not care for the light quality of the early versions so hopefully this has improved over the years).
Energy usage/conservation is an important issue in California just as it is world wide.
DeKay