condition mean min max 4 h after light 8.690491 8.313042 9.06794 8 h after light 10.7952975 10.669166 10.921429 12 h after light 9.6066175 7.786209 11.427026 4 h after dark 12.609307 10.900604 14.31801 8 h after dark 16.867057 8.959527 24.774587 12 h after dark 10.125926 10.125926 10.125926