condition mean min max 4 h after light 9.247275 7.97635 10.5182 8 h after light 6.21094 6.0051 6.41678 12 h after light 4.52815 4.07115 4.98515 4 h after dark 5.71124 5.48381 6.05418 8 h after dark 6.96334 6.2527 7.59637 12 h after dark 8.473346666666666 7.81505 8.93938