condition mean min max 4 h after light 71.6 71.6 71.6 8 h after light 35.85 30.2 41.5 12 h after light 20.9 8.3 33.5 4 h after dark 51.8 49.4 54.2 8 h after dark 63.0 58.3 67.7 12 h after dark 36.05 31.0 41.1