Be aware this will shut off all of your power, not just for one fixture. You should also unplug the lighting fixture before you change the light bulb (if it's a fixture with a plug, that is).
[header] How to change a light bulb [title] Make sure the power is turned off. [step] This is a good idea any time you are messing around with electrical fixtures. Why not be safe? [substeps] Just switch the red power button to " off " in your fuse box.