If a bedside light switch is on, but nearby is no bulb within the lights, are you using electricity? ...

Why does the hose pressure on my Worcester...
Answers:    Depends on the type of light fixture....incandescent fixture,(common screw contained by type bulb) no. Fluorescent fixture, or similar fixture with ballast, (long tube type bulb) next yes. Any time you have something connected to power, beside a switch on, a small amount of electricity is being used.
Where's the washer on a tub faucet if...
No, because within is nothing to sort the circuit complete.