condition mean min max 4 h after light 4.48224 2.81585 6.14863 8 h after light 6.39468 3.59253 9.19683 12 h after light 6.53281 5.61611 7.44951 4 h after dark 9.891425 9.40845 10.3744 8 h after dark 6.42117 4.71483 8.12751 12 h after dark 8.358445 6.86171 9.85518