condition mean min max 4 h after light 58.9 58.9 58.9 8 h after light 82.25 81.1 83.4 12 h after light 121.2 113.5 128.9 4 h after dark 75.0 68.4 81.6 8 h after dark 65.85 50.5 81.2 12 h after dark 53.7 50.7 56.7