condition mean min max 0 h after light 2.22922 1.66904 2.7894 4 h after light 4.09041 3.93623 4.24459 8 h after light 6.2497 6.20634 6.29306 4 h after dark 5.60097 4.76605 6.43589 8 h after dark 4.75549 4.6504 4.86058 12 h after dark 2.56625 2.016 3.1165