Lift out the glass from the metal bottom. (It may take a twist to the left to loosen it up.) That exposes the bulb. Twist out the bulb like any other lamp and then screw in the new one. (I'm still looking to see what size bulb it takes. 25W doesn't heat up the lava very well for this type of lamp. If you know what bulb it takes, please email me at[email protected])