My dad asked me to replace the light next to his front door with a motion sensing unit. He bought a stock fixture from HD with the sensor built into the fixture. There is no way to aim the sensor, it just points straight out from the front of the fixture.
The instructions say that the sensor will work better if the "heat source" moves across the coverage area as opposed to straight towards it. They sure got that right!
The approach to their front door is straight up a ~40' walkway from the sidewalk. Even set at the highest sensitivity, which should allow for a ~30' range, the light doesn't come on until the person is right at the stoop, ready to lift their leg onto the first step.
However, if you walk across the yard the light will come on anywhere in the 5' to 30'+ range. In fact, 1 out 3 cars going down the street activate the light.
Unfortunately, "across the coverage area" is not how they (or anyone else) would approach their front door.
What kind of fixture/sensor does he need so that it will pick up people walking straight towards it?
BTW, it's an old brick house with a shallow box for the fixture cut into the brick. A one-for-one swap is easy, but mounting a separate sensor someplace else and running wires back to the fixture would be a pain. I'd really prefer something built into the fixture if possible.