condition mean min max 0 h after light 7.79567 7.16611 8.42523 4 h after light 8.288495000000001 8.15971 8.41728 8 h after light 15.8725 15.636 16.109 4 h after dark 15.2492 12.4634 18.035 8 h after dark 12.9445 12.8902 12.9988 12 h after dark 7.89959 6.65951 9.13967