condition mean min max 4 h after light 1.6 1.6 1.6 8 h after light 5.15 2.9 7.4 12 h after light 5.4 5.2 5.6 4 h after dark 18.2 4.8 31.6 8 h after dark 22.200000000000003 19.3 25.1 12 h after dark 4.85 3.8 5.9