If the bulb is in the bathroom, the electrical outlet should have a reset button on it. Simply push the reset button and the light should now work.
Step3
If the bulb is in a room other than the bathroom, locate your circuit breaker. Identify the room where the bulb is located. Flip the switch and then flip it back. Viola, the bulb is reset!
Tips & Warnings
By reseting the circuit to a room, ALL electronics including clocks, etc in that room will be reset.