A floor lamp is one way to create extra light in a room and fill an empty space. Floor lamps have a base that sits directly on the floor. Sometimes the lamppost turns in small increments when you change the light bulb or turn the lamp on and off. Because of this, the bolt or nut securing the post can become loose. When this happens, the centre bolt or nut literally lifts the base off the floor, causing the lamp to be wobbly. Repairing a wobbly floor lamp is a simple matter of adjusting either the base feet or the centre securing mechanism.
Unplug the floor lamp from the wall outlet. Remove the shade and the light bulb from the lamp. Lay the lamp on its side on the floor so you can access the bottom of the lamp base.
Turn the leg knobs of a flat lamp base leg clockwise to ensure none of them are loose. Leg knobs are simple round balls or blocks on the base of the lamp that provide space between the base and the floor.
Rotate the centre bolt or nut clockwise with a flathead screwdriver or wrench to tighten it against the bottom of the base. The bolt or nut secures the lamppost to the base.
Stand the floor lamp back on its base. Install the light bulb and lamp shade. Plug the power cord back into the wall outlet.