I have looked at the 'radar' bulbs myself, as I thought they would be great for several applications at my house. The big holdup for me was exactly what you experienced....I thought they'd be nice in the connector from the house to the workshop and garage, but wouldn't tolerate activation from inside the room at either end...the reviews I read mentioned, for example, putting the bulb in the outside light by the door, but getting activation from inside the house. I think for the time being, I'll stick with the 'Eye' detectors I use now with great success. And BTW, the batteries have worked in mine for years with no issues, probably change every three years or so and the two I have in use detect at least 10 times a day...