condition	mean	min	max
4 h after light	7.52198	7.3486899999999995	7.60986
8 h after light	7.299433333333334	7.2359800000000005	7.39226
12 h after light	7.308096666666667	7.036410000000001	7.56319
4 h after dark	7.398183333333333	7.1534699999999996	7.61072
8 h after dark	7.64486	7.5375	7.718310000000001
12 h after dark	7.82494	7.65837	7.91505