condition mean min max 4 h after light 5.584295 4.88884 6.27975 8 h after light 4.74852 4.53739 4.95965 12 h after light 6.21117 5.86125 6.56109 4 h after dark 8.559126666666666 8.02544 9.34327 8 h after dark 11.662996666666666 8.60289 13.4496 12 h after dark 5.16047 3.68908 5.94864