condition mean min max 4 h after light 3.4 3.4 3.4 8 h after light 18.4 3.9 32.9 12 h after light 4.85 4.4 5.3 4 h after dark 6.050000000000001 5.9 6.2 8 h after dark 6.45 1.8 11.1 12 h after dark 2.9000000000000004 2.2 3.6