condition	mean	min	max
4 h after light	7.481613333333334	7.471360000000001	7.493310000000001
8 h after light	7.7631	7.58949	7.96967
12 h after light	7.12958	7.05478	7.27457
4 h after dark	7.215626666666666	6.973889999999999	7.53118
8 h after dark	7.30555	7.14265	7.49194
12 h after dark	7.2583	7.2092	7.326860000000001