To give an illustrative idea of your point -- I typically leave my AC at 75f during daylight (when it's 100f ambient), but turn it down to 70 to sleep (when it

To give an illustrative idea of your point -- I typically leave my AC at 75f during daylight (when it's 100f ambient), but turn it down to 70 to sleep (when it's 85-90f ambient). So it's possible I'm actually ACing more or as much at night.