How do i fit a ceiling mounted light. I only have a wall light ??

[dicky_heart]

Hi,

My mom as asked me to fit her a fluorescent light on the ceiling at the bottom of her staircase. At the moment the only lighting there is a single wall light, operated by a single light switch.

She would like to keep the wall light , and preferably have the flourescent switching on either with it or from a seperate switch.

Could anyone tell me how to go about doing this.

Thank You

Rob