condition	mean	min	max
4 h after light	6.27706	5.80397	6.51604
8 h after light	6.6378	6.42833	6.79537
12 h after light	6.0683766666666665	5.85177	6.30255
4 h after dark	6.59359	6.336880000000001	6.919339999999999
8 h after dark	6.714846666666666	6.41852	7.10835
12 h after dark	7.150363333333333	6.73588	7.51668