condition	mean	min	max
4 h after light	19.2080355	17.997511	20.41856
8 h after light	18.493649	17.255946	19.731352
12 h after light	18.82249	18.099368	19.545612
4 h after dark	16.48633	14.082116	18.890544
8 h after dark	18.423004499999998	15.878252	20.967757
12 h after dark	19.821554	19.821554	19.821554