condition mean min max 4 h after light 646.827333 631.484498 662.170168 8 h after light 569.944113 564.642499 575.245727 12 h after light 608.0694475 528.869116 687.269779 4 h after dark 494.378233 435.896663 552.859803 8 h after dark 585.95934 581.073998 590.844682 12 h after dark 600.317431 600.317431 600.317431