condition mean min max 4 h after light 17.332062 16.486525 18.177599 8 h after light 17.8929825 16.417913 19.368052 12 h after light 16.452833 16.417913 16.487753 4 h after dark 16.346406 16.274899 16.417913 8 h after dark 16.6946515 16.417913 16.97139 12 h after dark 14.047412 14.047412 14.047412