condition mean min max 4 h after light 7.790675 6.67302 8.90833 8 h after light 5.1469000000000005 5.10994 5.18386 12 h after light 3.902375 3.83487 3.96988 4 h after dark 4.030423333333333 3.63298 4.26367 8 h after dark 6.931226666666666 6.62586 7.40396 12 h after dark 9.443203333333333 8.36448 10.2119