condition mean min max 4 h after light 41.2 41.2 41.2 8 h after light 87.55 87.0 88.1 12 h after light 72.75 61.5 84.0 4 h after dark 67.95 52.9 83.0 8 h after dark 70.55 69.3 71.8 12 h after dark 34.5 25.4 43.6