condition	mean	min	max
4 h after light	7.5400366666666665	7.50102	7.5814699999999995
8 h after light	7.241763333333334	7.03273	7.3663300000000005
12 h after light	6.9841	6.95603	7.008319999999999
4 h after dark	6.988403333333333	6.88448	7.116860000000001
8 h after dark	7.020363333333334	6.86373	7.1212800000000005
12 h after dark	6.55116	6.3512900000000005	6.678030000000001