condition	mean	min	max
4 h after light	6.1473466666666665	6.0502400000000005	6.28869
8 h after light	6.176793333333333	6.06033	6.31705
12 h after light	5.981986666666667	5.8147	6.12372
4 h after dark	6.0667800000000005	5.967230000000001	6.17439
8 h after dark	6.169843333333334	6.05725	6.26154
12 h after dark	6.0421	5.92646	6.15367