condition mean min max 4 h after light 9.6788785 9.368883 9.988874 8 h after light 8.995846499999999 8.682936 9.308757 12 h after light 9.6750755 9.368883 9.981268 4 h after dark 9.258299000000001 9.147715 9.368883 8 h after dark 9.9563325 9.35181 10.560855 12 h after dark 9.239791 9.239791 9.239791