condition mean min max 4 h after light 3.6 3.6 3.6 8 h after light 5.55 3.0 8.1 12 h after light 8.25 3.1 13.4 4 h after dark 40.25 7.6 72.9 8 h after dark 24.45 5.0 43.9 12 h after dark 6.8500000000000005 3.4 10.3