To have a motion sensing light control other fixtures you need to run
wires from the switched electric at the motion sensing light, But most
are rated at 350-500 watt so you cant add much. X -10 also known as
Radioshack Plug In Power has exterior motion lamps and switch modules
that can control everything even from 3 button built in or hand held
garage door openers. One unit can be set to trigger many others by AC
line pulse communication.