condition mean min max 4 h after light 16.139557 13.643461 18.635653 8 h after light 12.2237795 10.08474 14.362819 12 h after light 12.4811955 12.424757 12.537634 4 h after dark 13.4458625 12.376616 14.515109 8 h after dark 12.7281405 12.164764 13.291517 12 h after dark 9.63357 9.63357 9.63357