condition mean min max 4 h after light 0.47299599999999997 0.437205 0.508787 8 h after light 0.7273795000000001 0.610843 0.843916 12 h after light 1.0096055000000002 0.869561 1.14965 4 h after dark 2.259675 1.74849 2.77086 8 h after dark 1.500745 1.35219 1.6493 12 h after dark 1.38123 1.30406 1.4584