condition	mean	min	max
0 h after light	17.8454	16.9826	18.7082
4 h after light	12.557649999999999	11.9466	13.1687
8 h after light	18.8863	18.5792	19.1934
4 h after dark	20.7247	19.8437	21.6057
8 h after dark	19.66785	18.9876	20.3481
12 h after dark	15.43685	14.8192	16.0545