condition mean min max 0 h after light 3.50645 3.46393 3.54897 4 h after light 3.87344 3.41524 4.33164 8 h after light 4.175275 3.36579 4.98476 4 h after dark 4.542845 4.52389 4.5618 8 h after dark 3.58196 3.48907 3.67485 12 h after dark 3.41047 2.43722 4.38372