condition	mean	min	max
4 h after light	6.702426666666666	6.580419999999999	6.83847
8 h after light	6.8403	6.57215	6.98272
12 h after light	7.00574	6.6976	7.213889999999999
4 h after dark	7.033276666666667	6.91055	7.23107
8 h after dark	6.9624	6.744669999999999	7.1416
12 h after dark	7.083713333333334	6.9838	7.234780000000001