condition mean min max 0 h after light 5.77957 4.88527 6.67387 4 h after light 8.352835 7.9713 8.73437 8 h after light 7.11564 7.01428 7.217 4 h after dark 9.409355 9.0605 9.75821 8 h after dark 10.6963 10.6178 10.7748 12 h after dark 7.947699999999999 6.22577 9.66963