condition mean min max 4 h after light 9.9622095 9.646215 10.278204 8 h after light 9.156305 8.345617 9.966993 12 h after light 9.437954000000001 8.91737 9.958538 4 h after dark 10.036874000000001 9.661455 10.412293 8 h after dark 9.1585025 8.587103 9.729902 12 h after dark 9.365782 9.365782 9.365782