condition mean min max 0 h after light 5.690825 5.02727 6.35438 4 h after light 7.98641 7.46481 8.50801 8 h after light 15.2207 14.0763 16.3651 4 h after dark 10.637720000000002 9.69874 11.5767 8 h after dark 15.38885 15.3156 15.4621 12 h after dark 6.365285 6.23516 6.49541