condition mean min max 4 h after light 4.966365 2.28743 7.6453 8 h after light 6.488905 5.65088 7.32693 12 h after light 9.62843 8.94416 10.3127 4 h after dark 11.382766666666667 10.8997 12.024 8 h after dark 9.930286666666666 9.10238 10.9089 12 h after dark 6.29145 5.35129 7.56724