condition mean min max 4 h after light 12.4 12.4 12.4 8 h after light 8.45 7.8 9.1 12 h after light 15.399999999999999 14.6 16.2 4 h after dark 11.899999999999999 9.7 14.1 8 h after dark 15.3 10.5 20.1 12 h after dark 15.35 15.2 15.5