condition mean min max 4 h after light 51.2 51.2 51.2 8 h after light 37.6 36.5 38.7 12 h after light 75.25 68.1 82.4 4 h after dark 72.25 60.0 84.5 8 h after dark 65.4 53.5 77.3 12 h after dark 39.35 6.4 72.3