condition mean min max 4 h after light 8.528667 7.963714 9.09362 8 h after light 8.885154499999999 8.721691 9.048618 12 h after light 9.583096000000001 9.189272 9.97692 4 h after dark 8.5756095 7.995859 9.15536 8 h after dark 8.966148 7.780496 10.1518 12 h after dark 10.659329 10.659329 10.659329