condition	mean	min	max
4 h after light	6.8224100000000005	6.6422300000000005	7.07793
8 h after light	7.052433333333333	7.01686	7.074439999999999
12 h after light	7.412016666666666	7.29442	7.56115
4 h after dark	7.1137733333333335	6.942060000000001	7.2533199999999995
8 h after dark	7.000513333333334	6.975210000000001	7.017530000000001
12 h after dark	6.86926	6.80341	6.94033