condition mean min max 4 h after light 9.8306595 9.668695 9.992624 8 h after light 8.9836785 8.260543 9.706814 12 h after light 8.782575 8.782575 8.782575 4 h after dark 8.839780999999999 8.010867 9.668695 8 h after dark 7.7774304999999995 7.429393 8.125468 12 h after dark 8.782575 8.782575 8.782575