zerop

Ok then, what's the difference between these two? From Sunset For 2 hours Then turn light on Else turn light off -----and this one----- From Sunset To Sunset + 2 hours Then turn light on Else turn light off Anything?

Didn't know how exactly to search for this subject. I currently have a program to run from sunset to 6:30pm (same day) everyday. At sunset some lights are turned on and at 6:30pm the lights are turned off. This time of year it is no problem as sunset is at about 5:00pm. What happens later in the year (and especially after the time change) when sunset is after 6:30pm? Will the program run backwards? Say sunset is at 7:00pm. Will the lights be turned off at 6:30pm (they would already be off) and then at sunset (at 7:00pm) they would be turned on?