condition mean min max 4 h after light 10.073232999999998 9.207453 10.939013 8 h after light 8.459527 8.189724 8.72933 12 h after light 7.6016895 7.251905 7.951474 4 h after dark 8.415526 8.175347 8.655705 8 h after dark 8.950465 8.912474 8.988456 12 h after dark 9.140696 9.140696 9.140696