condition mean min max 4 h after light 21.9 21.9 21.9 8 h after light 9.35 5.5 13.2 12 h after light 5.6 3.9 7.3 4 h after dark 7.45 5.5 9.4 8 h after dark 8.399999999999999 7.6 9.2 12 h after dark 18.35 16.4 20.3