condition mean min max 0 h after light 6.617395 6.52734 6.70745 2 h after light 15.56475 15.3071 15.8224 4 h after light 14.14245 13.8145 14.4704 8 h after light 7.950075 7.20062 8.69953 12 h after light 12.5843 11.6216 13.547 2 h after dark 8.69312 7.30624 10.08 4 h after dark 7.80073 6.13104 9.47042 8 h after dark 7.6012949999999995 6.67432 8.52827 12 h after dark 7.60785 7.601 7.6147