condition mean min max 4 h after light 5.181803333333333 4.9897 5.344469999999999 8 h after light 5.321766666666667 5.11981 5.62509 12 h after light 5.15245 4.9474800000000005 5.54505 4 h after dark 5.20594 5.10417 5.334969999999999 8 h after dark 5.053636666666666 4.71962 5.256869999999999 12 h after dark 5.1782200000000005 4.97398 5.5122800000000005