condition mean min max 4 h after light 1.7 1.7 1.7 8 h after light 4.4 2.2 6.6 12 h after light 8.9 7.8 10.0 4 h after dark 8.399999999999999 8.2 8.6 8 h after dark 5.75 4.6 6.9 12 h after dark 7.25 5.5 9.0