Sure, there are ones that can be used to replace a wall switch.
To see one example, go to homedepot.com and search for 100396703

My brother has these in his house, though of course when they turn on
depends on the location of the switch it replaces.

--

Mike S.

"BOB" wrote in message
...
I know there are motion sensors which detect movement and can turn on
a light fixture. What I was wondering is there a way to do this inside
a house? I would need one that would detect a person walking _into_
the room so the light would cut on several feet before a person enters
the room.

Is there a relatively cheap and easy way to do this?
Perhaps I might want to do only one room to see how it would work out?

thanks,