condition mean min max 4 h after light 54.9 54.9 54.9 8 h after light 47.7 32.2 63.2 12 h after light 60.05 43.6 76.5 4 h after dark 74.45 64.4 84.5 8 h after dark 79.15 72.4 85.9 12 h after dark 89.5 85.6 93.4