condition mean min max 4 h after light 5.306035 4.28798 6.32409 8 h after light 7.445505000000001 7.20535 7.68566 12 h after light 8.495595000000002 8.43894 8.55225 4 h after dark 9.95342 8.78534 11.1215 8 h after dark 7.14038 7.12648 7.15428 12 h after dark 7.270935 7.19589 7.34598