condition mean min max 4 h after light 9.943265 7.41763 12.4689 8 h after light 8.56451 8.38798 8.74104 12 h after light 8.221615 7.33431 9.10892 4 h after dark 9.345753333333333 8.05546 11.7569 8 h after dark 10.638403333333333 9.83771 11.9023 12 h after dark 11.123733333333334 10.4688 12.2086