condition mean min max 4 h after light 87.6 87.6 87.6 8 h after light 96.0 71.6 120.4 12 h after light 100.05 97.3 102.8 4 h after dark 95.85 74.9 116.8 8 h after dark 81.75 67.7 95.8 12 h after dark 74.55 58.5 90.6