condition mean min max 4 h after light 9.693337 9.089774 10.2969 8 h after light 9.942142 8.105381 11.778903 12 h after light 8.8657325 8.698769 9.032696 4 h after dark 9.5546355 9.014235 10.095036 8 h after dark 9.977881 9.368883 10.586879 12 h after dark 9.368883 9.368883 9.368883