condition mean min max 4 h after light 9.845648 8.881247 10.810049 8 h after light 9.856987499999999 9.595854 10.118121 12 h after light 9.309491000000001 8.911151 9.707831 4 h after dark 8.3493275 7.599963 9.098692 8 h after dark 8.57246 8.263673 8.881247 12 h after dark 8.540268 8.540268 8.540268