condition	mean	min	max
4 h after light	6.970863333333333	6.84086	7.1122
8 h after light	6.94983	6.9323	6.97766
12 h after light	6.8065766666666665	6.7644	6.853339999999999
4 h after dark	6.75273	6.68319	6.88473
8 h after dark	6.649453333333334	6.43738	6.884810000000001
12 h after dark	6.5950299999999995	6.42059	6.816269999999999