condition mean min max 4 h after light 56.0 56.0 56.0 8 h after light 71.85 67.7 76.0 12 h after light 77.7 65.7 89.7 4 h after dark 71.7 69.5 73.9 8 h after dark 83.85 73.1 94.6 12 h after dark 56.25 54.5 58.0