A year ago I had a long outdated and no longer working outdoor fixture changed to a motion detector light. The same electrical company was here for other work recently and I asked about the light which had stopped working, and they said a year was par for the course with outdoor sensors. Does this sound right to you? I confess I haven't tried the obvious which is to change the bulb because I need a tall ladder, but if the problem is the sensor I'm surprised to hear they need to be replaced that frequently. Does sensor quality differ? Can I upgrade?