condition mean min max 0 h after light 21.731749999999998 20.5998 22.8637 4 h after light 14.17295 12.848 15.4979 8 h after light 16.828249999999997 15.2686 18.3879 4 h after dark 45.5519 40.8606 50.2432 8 h after dark 35.78075 34.0615 37.5 12 h after dark 19.581249999999997 16.2685 22.894