condition mean min max 4 h after light 8.2015845 7.108644 9.294525 8 h after light 9.099969000000002 8.595503 9.604435 12 h after light 9.6582235 8.812562 10.503885 4 h after dark 9.7285825 9.414715 10.04245 8 h after dark 9.6757375 8.764596 10.586879 12 h after dark 9.192813 9.192813 9.192813