condition	mean	min	max
4 h after light	6.1689300000000005	5.98588	6.26543
8 h after light	6.3494633333333335	6.14131	6.58133
12 h after light	6.910290000000001	6.6788	7.033810000000001
4 h after dark	6.929633333333333	6.787839999999999	7.11385
8 h after dark	6.714896666666666	6.629389999999999	6.822760000000001
12 h after dark	6.556993333333334	6.36683	6.80474