Thanks for the reply. I will check them out today, but it may not work for me since the light switch is actually on the other side of a wall fro mthe exterior entrance. Well since I haven't began to hang the new drywall there yet guess I could just flip the switch from one side of the wall to the other and take advantage of it that way. Wonder what the angle spread is on the sensor? Guess it will vary.
Thanks pwhoolboom, I will check it out. I am sure it will help me by keeping me from running a a new light switch and wire to be next to the exterior door and installing 3-way. I am not remodeling the side with the exterior door yet.