condition mean min max 4 h after light 51.013267 47.843442 54.183092 8 h after light 48.151073499999995 45.324627 50.97752 12 h after light 47.6388945 46.289926 48.987863 4 h after dark 49.852990000000005 46.39047 53.31551 8 h after dark 49.7888815 44.808605 54.769158 12 h after dark 41.342926 41.342926 41.342926