condition mean min max 4 h after light 169.5 169.5 169.5 8 h after light 163.05 159.3 166.8 12 h after light 217.75 200.6 234.9 4 h after dark 229.35 207.6 251.1 8 h after dark 254.7 244.9 264.5 12 h after dark 207.15 190.3 224.0