condition mean min max 0 h after light 6.30419 6.19656 6.41182 4 h after light 2.98127 2.69013 3.27241 8 h after light 5.678100000000001 5.59722 5.75898 4 h after dark 10.464865 9.59473 11.335 8 h after dark 6.9404900000000005 6.38914 7.49184 12 h after dark 6.549625000000001 5.95122 7.14803