"Ed Pawlowski" wrote

Yes, but the motion detector will not know you are in the car. The
car is a big hunk of cold metal. Many of these sensors are actually
sensing heat, not motion. You can pull up in the car and it will not
go off. Only when the driver gets out of the car, it will sense body
heat and turn the light on.

The one I have now will sense the car, even when I back into the
driveway. It may be sensing the warm exhaust, but in any case, it
works better than my old ones.

Huh? Isn't the engine in front of a car warm at least when it drives up?
I've seen those FLIR videos of police chases, and the engines are white hot
to the sensor. I would think an engine that has been driven enough to get
the heater warm would put off more heat than a person at 98.6 with a coat
on.

Steve