condition	mean	min	max
4 h after light	6.441903333333333	6.32107	6.65123
8 h after light	6.381093333333333	6.07792	6.82782
12 h after light	6.2475933333333336	6.0141599999999995	6.53834
4 h after dark	6.237753333333334	6.14499	6.3257900000000005
8 h after dark	6.28691	6.21005	6.4000900000000005
12 h after dark	6.26327	5.9623	6.66033