condition mean min max 4 h after light 8.1 8.1 8.1 8 h after light 51.2 39.9 62.5 12 h after light 20.2 15.7 24.7 4 h after dark 23.55 21.3 25.8 8 h after dark 15.649999999999999 12.4 18.9 12 h after dark 26.55 4.7 48.4