condition mean min max 4 h after light 15.700600000000001 15.6843 15.7169 8 h after light 9.512635 9.2116 9.81367 12 h after light 8.873429999999999 8.42474 9.32212 4 h after dark 11.6323 11.4903 11.7743 8 h after dark 15.24595 14.8547 15.6372 12 h after dark 17.0927 16.7421 17.4433