condition mean min max 0 h after light 5.31599 5.10836 5.52362 4 h after light 4.622405 4.04836 5.19645 8 h after light 2.515835 2.06349 2.96818 4 h after dark 4.190165 3.66325 4.71708 8 h after dark 5.016405 3.99293 6.03988 12 h after dark 6.67596 5.66833 7.68359