condition	mean	min	max
4 h after light	6.7405566666666665	6.6344899999999996	6.91585
8 h after light	6.75184	6.57706	6.988289999999999
12 h after light	6.71067	6.3788800000000005	7.042110000000001
4 h after dark	6.885043333333334	6.650710000000001	7.252669999999999
8 h after dark	6.9023900000000005	6.8354800000000004	6.95366
12 h after dark	7.11405	6.73055	7.37195