condition mean min max 4 h after light 96.6 96.6 96.6 8 h after light 96.9 82.4 111.4 12 h after light 108.2 59.1 157.3 4 h after dark 88.8 43.5 134.1 8 h after dark 77.65 62.1 93.2 12 h after dark 60.349999999999994 52.4 68.3