condition mean min max 4 h after light 3.1 3.1 3.1 8 h after light 8.55 4.2 12.9 12 h after light 4.1 4.1 4.1 4 h after dark 38.9 17.9 59.9 8 h after dark 13.85 3.5 24.2 12 h after dark 6.6000000000000005 0.8 12.4