condition mean min max 4 h after light 1.2 1.2 1.2 8 h after light 16.9 4.9 28.9 12 h after light 4.3 3.6 5.0 4 h after dark 11.4 4.7 18.1 8 h after dark 3.6500000000000004 1.4 5.9 12 h after dark 1.75 1.6 1.9