Reason for todays visit was to install a customer supplied wall timer. The new timer was installed in place of the garage 3-way that controlled the front 2 wall lights as well as the 2 garage wall lights. Customer provided the defiant digital timer. At customers request we set timer to turn on at dusk and off at dawn. I walked customer through operation and left directions with him. While on site I noticed the post light was not working properly with the existing photocell (dusk to dawn). The light was on during the day time. I replaced the photocell with a new button style and it is now working properly.