Every night since moving in, I have been doing battle with the external light timer. The previous owner left instructions, and I found the manual online, but no matter what I did, I couldn’t get them to work correctly. Even when I set the program, the timer drifted and would be wrong by the next day.
I finally gave up trying to get it working and ordered the fanciest light timer I’ve ever seen: a Honeywell Econoswitch. It’s a digital timer that fits right into the light switch panel. You can do a separate program for each day to turn the lights on and off, or the really cool feature is that it will calculate the sunrise and sunset based on the latitude and longitude that you enter in. The installation was simple and this one is a breeze to program. It’s well worth the money!