condition mean min max 0 h after light 11.8264 10.7617 12.8911 4 h after light 16.159 15.5343 16.7837 8 h after light 18.3016 16.6459 19.9573 4 h after dark 17.6195 17.3498 17.8892 8 h after dark 13.399149999999999 13.2839 13.5144 12 h after dark 12.350014999999999 9.77453 14.9255