condition mean min max 0 h after light 8.72309 8.6272 8.81898 4 h after light 7.033635 5.56132 8.50595 8 h after light 12.80995 12.7158 12.9041 4 h after dark 13.60145 13.3147 13.8882 8 h after dark 9.492815 8.84353 10.1421 12 h after dark 9.062675 7.22395 10.9014