condition mean min max 4 h after light 10.90795 10.2542 11.5617 8 h after light 10.5622 10.3787 10.7457 12 h after light 12.38995 11.8869 12.893 4 h after dark 15.63665 14.5326 16.7407 8 h after dark 13.63365 13.229 14.0383 12 h after dark 13.25485 12.7953 13.7144