how to replace a light bulb

-first, make sure you turned off the power!
-Then, wait a moment until the bulb get cooler before touching it.
-Use a ledder to reach the bulb.
-Remove bulb. Take the bulb out from the socket. Keep gently twisting anticlockwise until the bulb comes loose from the socket.
-Replace previous bulb with the new one. Keep gently twisting clockwise until it won't go any further.
-Place the new bulb in the socket.
-Turn on the power.

First, make sure the power is turned off.
Let the bulb cool off before you unscrew it.
Use a sturdy stepladder to reach the light bulb.
Hold the bulb then gently turn the bulb counter-clockwise.
The bulb should come loose from the socket, and you can remove it.
Finally, put a new bulb in the socket and turn it in a clockwise direction. Remember, don't screw the bulb too tight or it will break.

adapted from http://www.wikihow.com/Change-a-Light-Bulb