I've had a lamp post in front of my house for many years that I have utilized a screw in light sensor that activates the bulb at dusk and turns it off when the sun comes up in the morning. It worked fine for many years but several months ago stopped working. I have purchased several replacement screw-in sensors and none of them seem to work as the light stays on all of the time. Has anyone else experienced a problem of this nature? Are all of these screw in light sensors defective or is there another problem??