condition mean min max 4 h after light 56.5 56.5 56.5 8 h after light 94.9 68.5 121.3 12 h after light 52.85 50.2 55.5 4 h after dark 69.2 62.7 75.7 8 h after dark 102.4 97.9 106.9 12 h after dark 53.0 12.0 94.0