condition mean min max 4 h after light 97.6 97.6 97.6 8 h after light 52.75 48.9 56.6 12 h after light 80.0 62.7 97.3 4 h after dark 107.6 105.4 109.8 8 h after dark 58.449999999999996 43.8 73.1 12 h after dark 69.8 66.5 73.1