condition mean min max 0 h after light 9.0821 8.7149 9.4493 2 h after light 13.21619 6.52328 19.9091 4 h after light 15.9055 15.4294 16.3816 8 h after light 11.9038 11.8085 11.9991 12 h after light 39.49905 37.5888 41.4093 2 h after dark 18.7926 16.2559 21.3293 4 h after dark 11.431905 8.37671 14.4871 8 h after dark 9.559685 6.53527 12.5841 12 h after dark 7.5747 6.20221 8.94719