condition mean min max 4 h after light 5.213955 5.19368 5.23423 8 h after light 4.95862 4.94756 4.96968 12 h after light 5.45221 5.17932 5.7251 4 h after dark 8.729875 7.46268 9.99707 8 h after dark 6.396464999999999 5.76601 7.02692 12 h after dark 8.100255 7.81698 8.38353