condition mean min max 4 h after light 10.88124 9.484691 12.277789 8 h after light 12.4215335 11.656311 13.186756 12 h after light 14.500626 12.776428 16.224824 4 h after dark 12.318714 11.779378 12.85805 8 h after dark 16.0554405 15.762647 16.348234 12 h after dark 13.16027 13.16027 13.16027