Plus, the only motion sensor lights for interior use that I have seen are small and usually plugged directly into a socket.
Then you're not looking in the electrical department of any big box home store. There are plenty of wall switch units to be had that will keep the trigger zone above the dawg. As for the screw in variety look at the ones for outside the house so you can face them at the window or down a hallway.
Any half competent security company can mount one in a stairwell or hallway above the fido/felix level so that only a wee person could get by and if you're remotely competent with home wiring you can mount them yourself.