Several days ago, I purchased a UtiliTech Daylight Saving In-Wall Timer, Model 0192773. After installation, I programmed the unit, turned it on and off manually, and everything seemed to be working fine. The display showed that the unit was indeed programmed to turn on at dusk and off at dawn. The next day I was contacted by the homeowner and informed that the security lights did not turn on and off at dusk and dawn like they were supposed to. I responded to the home and reset the unit, and again it failed to turn on and off at dusk and dawn. I have since programmed it a third time, and the unit still fails to operate correctly. Very disappointed, and very costly for the homeowner.