In the morning I set it as close to first shooting light at possible (I adjust it about 3 times during the season as the days get shorter).
In the afternoon, 4:30.
Pretty dang close to what we do.
What I posted in a previous feeder post:
For us it is 15 - 25 minutes before sunrise and one hour before sunset.
There is no really good rule for all of Texas, Orange differs from Dalhart by a good 30 minutes.
I hunt in 4 different counties and set the time accordingly, it is simple, just google sunrise/sunset for your area.
As whitetail are crepuscular for the most part, they follow light/dark as their clock. So I set my feeders accordingly.
"Man is still a hunter, still a simple searcher after meat..." Robert C. Ruark