condition mean min max 4 h after light 8.854653500000001 8.747173 8.962134 8 h after light 10.0052085 8.962134 11.048283 12 h after light 8.587991500000001 7.918585 9.257398 4 h after dark 8.137441 7.312748 8.962134 8 h after dark 8.832017500000001 7.83288 9.831155 12 h after dark 8.962134 8.962134 8.962134