condition mean min max 4 h after light 9.762758999999999 9.745354 9.780164 8 h after light 9.3518325 9.125793 9.577872 12 h after light 9.401921999999999 8.214267 10.589577 4 h after dark 9.900002 9.771916 10.028088 8 h after dark 9.5385625 8.815425 10.2617 12 h after dark 8.407335 8.407335 8.407335