condition mean min max 0 h after light 1.853805 1.61601 2.0916 4 h after light 12.235305 8.95691 15.5137 8 h after light 1501.525 1469.17 1533.88 4 h after dark 172.5655 151.476 193.655 8 h after dark 26.92245 26.4111 27.4338 12 h after dark 3.84255 2.69542 4.98968