condition mean min max 4 h after light 6.4 6.4 6.4 8 h after light 10.0 5.5 14.5 12 h after light 3.4000000000000004 2.4 4.4 4 h after dark 11.95 5.7 18.2 8 h after dark 8.649999999999999 8.6 8.7 12 h after dark 14.75 8.1 21.4