condition	mean	min	max
4 h after light	19.823764	19.730592	19.916936
8 h after light	15.495904	14.725759	16.266049
12 h after light	17.7718085	16.773484	18.770133
4 h after dark	18.9269985	15.566929	22.287068
8 h after dark	17.036017	14.525675	19.546359
12 h after dark	19.312385	19.312385	19.312385