condition mean min max 4 h after light 90.0 90.0 90.0 8 h after light 49.2 33.9 64.5 12 h after light 72.35 46.7 98.0 4 h after dark 49.0 36.1 61.9 8 h after dark 56.45 44.0 68.9 12 h after dark 44.7 43.0 46.4