i had the bulb replaced a month or so ago - this was the first time it has worked since i moved here. although it has always been sensitive, it is only in the last 3 or so days that it has started staying on. i just found the switch last night so i can turn it off, but i found evidence that someone was trying to look into/get into my house, so i am hesitant to turn it off! of course! i thought that i remembered years ago on a light that was installed outside my front door that there was a pattern by which you flipped the switch to make it either motion detector or always on. no? i tried turning it off for several hours and turning it back on in an effort to "reset" it. i don't think it can be growing limbs as there has been no growth since it was repaired. LJ - can the sensitivity setting just change?