condition mean min max 4 h after light 3.7 3.7 3.7 8 h after light 14.95 4.1 25.8 12 h after light 14.2 6.4 22.0 4 h after dark 12.45 4.1 20.8 8 h after dark 20.05 5.9 34.2 12 h after dark 25.200000000000003 17.3 33.1