condition mean min max 4 h after light 9.858705 9.68301 10.0344 8 h after light 6.50945 6.15455 6.86435 12 h after light 4.782405 4.3233 5.24151 4 h after dark 5.92375 5.6774 6.31516 8 h after dark 7.64362 6.96095 8.29014 12 h after dark 8.064526666666666 7.74969 8.23312