I have another PIR Motion Sensor. Sometimes it will not trigger a light per the rules I set up when someone crosses its field of vision.
It is mounted on a low ceiling soffet and there are 2 can lights that use MR-16 Halogen bulbs. These are the bubls that are about an inch in diameter. They are 50 watt bulbs, but are on a dimmed setting. The PIR is is in between the two lights and they are about 18 inches away from the PIR and 10 inches forward.
Do you think these bulbs are heating up the air around the PIR making it so it can not sense body heat on people?