condition mean min max 4 h after light 4.9510000000000005 4.14387 5.75813 8 h after light 6.86352 6.83173 6.89531 12 h after light 7.612 6.27044 8.95356 4 h after dark 9.754 9.4657 10.0423 8 h after dark 9.650835 9.43413 9.86754 12 h after dark 9.12432 8.93376 9.31488