condition mean min max 4 h after light 16.7 16.7 16.7 8 h after light 83.85 66.9 100.8 12 h after light 96.85 81.9 111.8 4 h after dark 76.95 60.2 93.7 8 h after dark 69.9 52.2 87.6 12 h after dark 38.75 35.1 42.4