condition mean min max 4 h after light 12.9 12.9 12.9 8 h after light 4.4 4.2 4.6 12 h after light 12.5 4.4 20.6 4 h after dark 3.2 1.7 4.7 8 h after dark 10.95 8.9 13.0 12 h after dark 3.55 3.4 3.7